HDFFV-9994 port changes from develop.

CMake folder changes brought up to standard.

37 files changed, 2210 insertions, 562 deletions

diff --git a/tools/h5diff/CMakeLists.txt b/tools/h5diff/CMakeLists.txt
index 5876045..fcb1a30 100644
--- a/tools/h5diff/CMakeLists.txt
+++ b/tools/h5diff/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.1.0)
+cmake_minimum_required (VERSION 3.2.2)
 PROJECT (HDF5_TOOLS_H5DIFF)
 
 #-----------------------------------------------------------------------------
@@ -45,7 +45,35 @@ if (BUILD_TESTING)
     set_target_properties (h5diffgentest PROPERTIES FOLDER generator/tools)
 
     #add_test (NAME h5diffgentest COMMAND $<TARGET_FILE:h5diffgentest>)
-  endif (HDF5_BUILD_GENERATORS)
+  endif ()
+
+  #-----------------------------------------------------------------------------
+  # If plugin library tests can be tested
+  #-----------------------------------------------------------------------------
+  set (HDF5_TOOL_PLUGIN_LIB_CORENAME         "dynlibdiff")
+  set (HDF5_TOOL_PLUGIN_LIB_NAME             "${HDF5_EXTERNAL_LIB_PREFIX}${HDF5_TOOL_PLUGIN_LIB_CORENAME}")
+  set (HDF5_TOOL_PLUGIN_LIB_TARGET           ${HDF5_TOOL_PLUGIN_LIB_CORENAME})
+  add_definitions (${HDF_EXTRA_C_FLAGS})
+  INCLUDE_DIRECTORIES (${HDF5_SRC_DIR})
+
+  add_library (${HDF5_TOOL_PLUGIN_LIB_TARGET} SHARED dynlib_diff.c)
+  TARGET_C_PROPERTIES (${HDF5_TOOL_PLUGIN_LIB_TARGET} SHARED " " " ")
+  target_link_libraries (${HDF5_TOOL_PLUGIN_LIB_TARGET} ${HDF5_TEST_LIB_TARGET})
+  H5_SET_LIB_OPTIONS (${HDF5_TOOL_PLUGIN_LIB_TARGET} ${HDF5_TOOL_PLUGIN_LIB_NAME} SHARED ${HDF5_PACKAGE_SOVERSION})
+
+  # make plugins dir
+  file (MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/plugins")
+  #-----------------------------------------------------------------------------
+  # Copy plugin library to a plugins folder
+  #-----------------------------------------------------------------------------
+  add_custom_command (
+      TARGET     ${HDF5_TOOL_PLUGIN_LIB_TARGET}
+      POST_BUILD
+      COMMAND    ${CMAKE_COMMAND}
+      ARGS       -E copy_if_different
+          "$<TARGET_FILE:${HDF5_TOOL_PLUGIN_LIB_TARGET}>"
+          "${CMAKE_BINARY_DIR}/plugins/$<TARGET_FILE_NAME:${HDF5_TOOL_PLUGIN_LIB_TARGET}>"
+  )
 
   include (CMakeTests.cmake)
 
diff --git a/tools/h5diff/CMakeTests.cmake b/tools/h5diff/CMakeTests.cmake
index f2a7ab3..91e0cab 100644
--- a/tools/h5diff/CMakeTests.cmake
+++ b/tools/h5diff/CMakeTests.cmake
@@ -50,6 +50,8 @@
       ${HDF5_TOOLS_H5DIFF_SOURCE_DIR}/testfiles/compounds_array_vlen2.h5
       ${HDF5_TOOLS_H5DIFF_SOURCE_DIR}/testfiles/non_comparables1.h5
       ${HDF5_TOOLS_H5DIFF_SOURCE_DIR}/testfiles/non_comparables2.h5
+      ${HDF5_TOOLS_H5DIFF_SOURCE_DIR}/testfiles/tudfilter.h5
+      ${HDF5_TOOLS_H5DIFF_SOURCE_DIR}/testfiles/tudfilter2.h5
   )
 
   set (LIST_OTHER_TEST_FILES
@@ -227,6 +229,8 @@
       ${HDF5_TOOLS_H5DIFF_SOURCE_DIR}/testfiles/h5diff_710.txt
       ${HDF5_TOOLS_H5DIFF_SOURCE_DIR}/testfiles/h5diff_80.txt
       ${HDF5_TOOLS_H5DIFF_SOURCE_DIR}/testfiles/h5diff_90.txt
+      ${HDF5_TOOLS_H5DIFF_SOURCE_DIR}/testfiles/h5diff_ud.txt
+      ${HDF5_TOOLS_H5DIFF_SOURCE_DIR}/testfiles/h5diff_udfail.txt
   )
 
   set (LIST_WIN_TEST_FILES
@@ -238,6 +242,9 @@
 
   # Make testfiles dir under build dir
   file (MAKE_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles")
+  if (H5_HAVE_PARALLEL)
+    file (MAKE_DIRECTORY "${PROJECT_BINARY_DIR}/PAR/testfiles")
+  endif ()
 
   #
   # copy test files from source to build dir
@@ -245,6 +252,9 @@
   foreach (h5_tstfiles ${LIST_HDF5_TEST_FILES} ${LIST_OTHER_TEST_FILES})
     get_filename_component(fname "${h5_tstfiles}" NAME)
     HDFTEST_COPY_FILE("${h5_tstfiles}" "${PROJECT_BINARY_DIR}/testfiles/${fname}" "h5diff_files")
+    if (H5_HAVE_PARALLEL)
+      HDFTEST_COPY_FILE("${h5_tstfiles}" "${PROJECT_BINARY_DIR}/PAR/testfiles/${fname}" "h5diff_files")
+    endif ()
   endforeach ()
 
 
@@ -255,11 +265,17 @@
     foreach (h5_tstfiles ${LIST_WIN_TEST_FILES})
       get_filename_component(fname "${h5_tstfiles}" NAME)
       HDFTEST_COPY_FILE("${HDF5_TOOLS_H5DIFF_SOURCE_DIR}/testfiles/${h5_tstfiles}w.txt" "${PROJECT_BINARY_DIR}/testfiles/${fname}.txt" "h5diff_files")
+      if (H5_HAVE_PARALLEL)
+        HDFTEST_COPY_FILE("${HDF5_TOOLS_H5DIFF_SOURCE_DIR}/testfiles/${h5_tstfiles}w.txt" "${PROJECT_BINARY_DIR}/PAR/testfiles/${fname}.txt" "h5diff_files")
+      endif ()
     endforeach ()
   else ()
     foreach (h5_tstfiles ${LIST_WIN_TEST_FILES})
       get_filename_component(fname "${h5_tstfiles}" NAME)
       HDFTEST_COPY_FILE("${HDF5_TOOLS_H5DIFF_SOURCE_DIR}/testfiles/${h5_tstfiles}.txt" "${PROJECT_BINARY_DIR}/testfiles/${fname}.txt" "h5diff_files")
+      if (H5_HAVE_PARALLEL)
+        HDFTEST_COPY_FILE("${HDF5_TOOLS_H5DIFF_SOURCE_DIR}/testfiles/${h5_tstfiles}.txt" "${PROJECT_BINARY_DIR}/PAR/testfiles/${fname}.txt" "h5diff_files")
+      endif ()
     endforeach ()
   endif ()
   add_custom_target(h5diff_files ALL COMMENT "Copying files needed by h5diff tests" DEPENDS ${h5diff_files_list})
@@ -281,12 +297,7 @@
       if (NOT "${last_test}" STREQUAL "")
         set_tests_properties (H5DIFF-${resultfile} PROPERTIES DEPENDS ${last_test})
       endif ()
-    else (HDF5_ENABLE_USING_MEMCHECKER)
-      add_test (
-          NAME H5DIFF-${resultfile}-clear-objects
-          COMMAND    ${CMAKE_COMMAND}
-              -E remove ./testfiles/${resultfile}.out ./testfiles/${resultfile}.out.err
-      )
+    else ()
       add_test (
           NAME H5DIFF-${resultfile}
           COMMAND "${CMAKE_COMMAND}"
@@ -299,78 +310,85 @@
               -D "TEST_APPEND=EXIT CODE:"
               -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
       )
-      set_tests_properties (H5DIFF-${resultfile} PROPERTIES DEPENDS "H5DIFF-${resultfile}-clear-objects")
-    endif (HDF5_ENABLE_USING_MEMCHECKER)
+    endif ()
     if (H5_HAVE_PARALLEL)
       ADD_PH5_TEST (${resultfile} ${resultcode} ${ARGN})
     endif ()
-  ENDMACRO (ADD_H5_TEST file)
+  ENDMACRO ()
 
   MACRO (ADD_PH5_TEST resultfile resultcode)
     # If using memchecker add tests without using scripts
     if (HDF5_ENABLE_USING_MEMCHECKER)
       add_test (NAME PH5DIFF-${resultfile} COMMAND $<TARGET_FILE:ph5diff> ${MPIEXEC} ${MPIEXEC_PREFLAGS} ${MPIEXEC_NUMPROC_FLAG} ${MPIEXEC_MAX_NUMPROCS} ${MPIEXEC_POSTFLAGS} ${ARGN})
-      set_tests_properties (PH5DIFF-${resultfile} PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles")
+      set_tests_properties (PH5DIFF-${resultfile} PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/PAR/testfiles")
       if (NOT ${resultcode} STREQUAL "0")
         set_tests_properties (PH5DIFF-${resultfile} PROPERTIES WILL_FAIL "true")
       endif ()
       if (NOT "${last_test}" STREQUAL "")
         set_tests_properties (PH5DIFF-${resultfile} PROPERTIES DEPENDS ${last_test})
       endif ()
-    else (HDF5_ENABLE_USING_MEMCHECKER)
-      add_test (
-          NAME PH5DIFF-${resultfile}-clear-objects
-          COMMAND    ${CMAKE_COMMAND}
-              -E remove ./testfiles/${resultfile}_p.out ./testfiles/${resultfile}_p.out.err
-      )
+    else ()
       add_test (
           NAME PH5DIFF-${resultfile}
           COMMAND "${CMAKE_COMMAND}"
               -D "TEST_PROGRAM=${MPIEXEC};${MPIEXEC_PREFLAGS};${MPIEXEC_NUMPROC_FLAG};${MPIEXEC_MAX_NUMPROCS};${MPIEXEC_POSTFLAGS};$<TARGET_FILE:ph5diff>"
               -D "TEST_ARGS:STRING=${ARGN}"
-              -D "TEST_FOLDER=${PROJECT_BINARY_DIR}/testfiles"
-              -D "TEST_OUTPUT=P_${resultfile}.out"
+              -D "TEST_FOLDER=${PROJECT_BINARY_DIR}/PAR/testfiles"
+              -D "TEST_OUTPUT=${resultfile}.out"
               -D "TEST_EXPECT=${resultcode}"
               -D "TEST_REFERENCE=${resultfile}.txt"
 #              -D "TEST_APPEND=EXIT CODE: [0-9]"
 #              -D "TEST_REF_FILTER=EXIT CODE: 0"
               -D "TEST_SKIP_COMPARE=TRUE"
-              -P "${HDF_RESOURCES_EXT_DIR}/prunTest.cmake"
+              -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
       )
-      set_tests_properties (PH5DIFF-${resultfile} PROPERTIES DEPENDS "PH5DIFF-${resultfile}-clear-objects")
-    endif (HDF5_ENABLE_USING_MEMCHECKER)
-  ENDMACRO (ADD_PH5_TEST file)
-
-   # ADD_H5_NO_OUTPUT_TEST
-   # Purpose to verify only exitcode without output comparison
-   # Don't use this if possible; this may be removed.
-   MACRO (ADD_H5_NO_OUTPUT_TEST testname resultcode)
-    # If using memchecker add tests without using scripts
+    endif ()
+  ENDMACRO ()
+
+  MACRO (ADD_H5_UD_TEST testname resultcode resultfile)
     if (NOT HDF5_ENABLE_USING_MEMCHECKER)
+      # Remove any output file left over from previous test run
       add_test (
-          NAME H5DIFF-${testname}-clear-objects
+          NAME H5DIFF_UD-${testname}-clearall-objects
           COMMAND    ${CMAKE_COMMAND}
-              -E remove ./testfiles/${testname}.out ./testfiles/${testname}.out.err
+              -E remove
+              testfiles/${resultfile}.out
+              testfiles/${resultfile}.out.err
       )
-      # if there was a previous test
-      if (NOT "${last_test}" STREQUAL "")
-        set_tests_properties (H5DIFF-${testname}-clear-objects PROPERTIES DEPENDS ${last_test})
+      if (${resultcode} STREQUAL "2")
+        add_test (
+            NAME H5DIFF_UD-${testname}
+            COMMAND "${CMAKE_COMMAND}"
+                -D "TEST_PROGRAM=$<TARGET_FILE:h5diff>"
+                -D "TEST_ARGS:STRING=${ARGN}"
+                -D "TEST_FOLDER=${PROJECT_BINARY_DIR}/testfiles"
+                -D "TEST_OUTPUT=${resultfile}.out"
+                -D "TEST_EXPECT=${resultcode}"
+                -D "TEST_REFERENCE=${resultfile}.txt"
+                -D "TEST_APPEND=EXIT CODE:"
+                -D "TEST_ENV_VAR=HDF5_PLUGIN_PATH"
+                -D "TEST_ENV_VALUE=${CMAKE_BINARY_DIR}"
+                -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
+        )
+      else ()
+        add_test (
+            NAME H5DIFF_UD-${testname}
+            COMMAND "${CMAKE_COMMAND}"
+                -D "TEST_PROGRAM=$<TARGET_FILE:h5diff>"
+                -D "TEST_ARGS:STRING=${ARGN}"
+                -D "TEST_FOLDER=${PROJECT_BINARY_DIR}/testfiles"
+                -D "TEST_OUTPUT=${resultfile}.out"
+                -D "TEST_EXPECT=${resultcode}"
+                -D "TEST_REFERENCE=${resultfile}.txt"
+                -D "TEST_APPEND=EXIT CODE:"
+                -D "TEST_ENV_VAR=HDF5_PLUGIN_PATH"
+                -D "TEST_ENV_VALUE=${CMAKE_BINARY_DIR}/plugins"
+                -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
+        )
       endif ()
-    endif (NOT HDF5_ENABLE_USING_MEMCHECKER)
-
-    add_test (NAME H5DIFF-${testname} COMMAND $<TARGET_FILE:h5diff> ${ARGN})
-    if (NOT ${resultcode} STREQUAL "0")
-      set_tests_properties (H5DIFF-${testname} PROPERTIES WILL_FAIL "true")
+      set_tests_properties (H5DIFF_UD-${testname} PROPERTIES DEPENDS H5DIFF_UD-${testname}-clearall-objects)
     endif ()
-
-    if (HDF5_ENABLE_USING_MEMCHECKER)
-      if (NOT "${last_test}" STREQUAL "")
-        set_tests_properties (H5DIFF-${testname} PROPERTIES DEPENDS ${last_test})
-      endif ()
-    else (HDF5_ENABLE_USING_MEMCHECKER)
-      set_tests_properties (H5DIFF-${testname} PROPERTIES DEPENDS H5DIFF-${testname}-clear-objects)
-    endif (HDF5_ENABLE_USING_MEMCHECKER)
-  ENDMACRO (ADD_H5_NO_OUTPUT_TEST)
+  ENDMACRO ()
 
 ##############################################################################
 ##############################################################################
@@ -784,9 +802,9 @@
     set_tests_properties (H5DIFF-clearall-objects PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles")
     if (NOT "${last_test}" STREQUAL "")
       set_tests_properties (H5DIFF-clearall-objects PROPERTIES DEPENDS ${last_test})
-    endif (NOT "${last_test}" STREQUAL "")
+    endif ()
     set (last_test "H5DIFF-clearall-objects")
-  endif (HDF5_ENABLE_USING_MEMCHECKER)
+  endif ()
 
 # ############################################################################
 # # Common usage
@@ -1357,3 +1375,9 @@ ADD_H5_TEST (h5diff_643 1 -v -d 5 --use-system-epsilon ${FILE1} ${FILE2} /g1/dse
 ADD_H5_TEST (h5diff_644 1 -v --use-system-epsilon -d 5 ${FILE1} ${FILE2} /g1/dset3 /g1/dset4)
 ADD_H5_TEST (h5diff_645 1 -v -p 0.05 --use-system-epsilon ${FILE1} ${FILE2} /g1/dset3 /g1/dset4)
 ADD_H5_TEST (h5diff_646 1 -v --use-system-epsilon -p 0.05 ${FILE1} ${FILE2} /g1/dset3 /g1/dset4)
+
+##############################################################################
+###    P L U G I N  T E S T S
+##############################################################################
+ADD_H5_UD_TEST (h5diff_plugin_test 0 h5diff_ud -v tudfilter.h5 tudfilter2.h5)
+ADD_H5_UD_TEST (h5diff_plugin_fail 2 h5diff_udfail -v tudfilter.h5 tudfilter2.h5)
diff --git a/tools/h5diff/Makefile.am b/tools/h5diff/Makefile.am
index 7e3b620..0d01f14 100644
--- a/tools/h5diff/Makefile.am
+++ b/tools/h5diff/Makefile.am
@@ -44,6 +44,11 @@ check_PROGRAMS=$(TEST_PROG)
 check_SCRIPTS=$(TEST_SCRIPT) $(TEST_SCRIPT_PARA)
 # The parallel test script testph5diff.sh actually depends on testh5diff.sh.
 SCRIPT_DEPEND=h5diff$(EXEEXT) $(H5PDIFF) testh5diff.sh
+if HAVE_SHARED_CONDITIONAL
+if USE_PLUGINS_CONDITIONAL
+   TEST_SCRIPT += h5diff_plugin.sh
+endif
+endif
 
 # Source files for the program
 h5diff_SOURCES=h5diff_main.c h5diff_common.c
@@ -53,9 +58,20 @@ h5diffgentest_SOURCES=h5diffgentest.c
 # Programs depend on the main HDF5 library and tools library
 LDADD=$(LIBH5TOOLS) $(LIBHDF5)
 
+if HAVE_SHARED_CONDITIONAL
+  # Build it as shared library if configure is enabled for shared library.
+  lib_LTLIBRARIES=libdynlibdiff.la
+  libdynlibdiff_la_SOURCES=dynlib_diff.c
+
+install-exec-hook:
+	$(RM) $(DESTDIR)$(libdir)/*dynlib*
+endif
+
 # Temporary files.  *.h5 are generated by h5diff.  They should
 # be copied to the testfiles/ directory if update is required
 CHECK_CLEANFILES+=*.h5 expect_sorted actual_sorted
 
+DISTCLEANFILES=h5diff_plugin.sh
+
 include $(top_srcdir)/config/conclude.am
 
diff --git a/tools/h5diff/Makefile.in b/tools/h5diff/Makefile.in
index 92ec96d..a6bb1d1 100644
--- a/tools/h5diff/Makefile.in
+++ b/tools/h5diff/Makefile.in
@@ -31,6 +31,7 @@
 # HDF5 Library Makefile(.in)
 #
 
+
 VPATH = @srcdir@
 am__is_gnu_make = { \
   if test -z '$(MAKELEVEL)'; then \
@@ -107,6 +108,7 @@ build_triplet = @build@
 host_triplet = @host@
 bin_PROGRAMS = h5diff$(EXEEXT) $(am__EXEEXT_1)
 check_PROGRAMS = $(am__EXEEXT_2)
+@HAVE_SHARED_CONDITIONAL_TRUE@@USE_PLUGINS_CONDITIONAL_TRUE@am__append_1 = h5diff_plugin.sh
 TESTS = $(am__EXEEXT_2) $(TEST_SCRIPT)
 subdir = tools/h5diff
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
@@ -117,20 +119,55 @@ am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
 DIST_COMMON = $(srcdir)/Makefile.am $(am__DIST_COMMON)
 mkinstalldirs = $(SHELL) $(top_srcdir)/bin/mkinstalldirs
 CONFIG_HEADER = $(top_builddir)/src/H5config.h
-CONFIG_CLEAN_FILES = testh5diff.sh testph5diff.sh
+CONFIG_CLEAN_FILES = h5diff_plugin.sh testh5diff.sh testph5diff.sh
 CONFIG_CLEAN_VPATH_FILES =
+am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`;
+am__vpath_adj = case $$p in \
+    $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \
+    *) f=$$p;; \
+  esac;
+am__strip_dir = f=`echo $$p | sed -e 's|^.*/||'`;
+am__install_max = 40
+am__nobase_strip_setup = \
+  srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*|]/\\\\&/g'`
+am__nobase_strip = \
+  for p in $$list; do echo "$$p"; done | sed -e "s|$$srcdirstrip/||"
+am__nobase_list = $(am__nobase_strip_setup); \
+  for p in $$list; do echo "$$p $$p"; done | \
+  sed "s| $$srcdirstrip/| |;"' / .*\//!s/ .*/ ./; s,\( .*\)/[^/]*$$,\1,' | \
+  $(AWK) 'BEGIN { files["."] = "" } { files[$$2] = files[$$2] " " $$1; \
+    if (++n[$$2] == $(am__install_max)) \
+      { print $$2, files[$$2]; n[$$2] = 0; files[$$2] = "" } } \
+    END { for (dir in files) print dir, files[dir] }'
+am__base_list = \
+  sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \
+  sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g'
+am__uninstall_files_from_dir = { \
+  test -z "$$files" \
+    || { test ! -d "$$dir" && test ! -f "$$dir" && test ! -r "$$dir"; } \
+    || { echo " ( cd '$$dir' && rm -f" $$files ")"; \
+         $(am__cd) "$$dir" && rm -f $$files; }; \
+  }
+am__installdirs = "$(DESTDIR)$(libdir)" "$(DESTDIR)$(bindir)"
+LTLIBRARIES = $(lib_LTLIBRARIES)
+libdynlibdiff_la_LIBADD =
+am__libdynlibdiff_la_SOURCES_DIST = dynlib_diff.c
+@HAVE_SHARED_CONDITIONAL_TRUE@am_libdynlibdiff_la_OBJECTS =  \
+@HAVE_SHARED_CONDITIONAL_TRUE@	dynlib_diff.lo
+libdynlibdiff_la_OBJECTS = $(am_libdynlibdiff_la_OBJECTS)
+AM_V_lt = $(am__v_lt_@AM_V@)
+am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
+am__v_lt_0 = --silent
+am__v_lt_1 = 
+@HAVE_SHARED_CONDITIONAL_TRUE@am_libdynlibdiff_la_rpath = -rpath \
+@HAVE_SHARED_CONDITIONAL_TRUE@	$(libdir)
 @BUILD_PARALLEL_CONDITIONAL_TRUE@am__EXEEXT_1 = ph5diff$(EXEEXT)
-am__installdirs = "$(DESTDIR)$(bindir)"
 am__EXEEXT_2 = h5diffgentest$(EXEEXT)
 PROGRAMS = $(bin_PROGRAMS)
 am_h5diff_OBJECTS = h5diff_main.$(OBJEXT) h5diff_common.$(OBJEXT)
 h5diff_OBJECTS = $(am_h5diff_OBJECTS)
 h5diff_LDADD = $(LDADD)
 h5diff_DEPENDENCIES = $(LIBH5TOOLS) $(LIBHDF5)
-AM_V_lt = $(am__v_lt_@AM_V@)
-am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
-am__v_lt_0 = --silent
-am__v_lt_1 = 
 h5diff_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
 	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
 	$(h5diff_LDFLAGS) $(LDFLAGS) -o $@
@@ -176,10 +213,10 @@ AM_V_CCLD = $(am__v_CCLD_@AM_V@)
 am__v_CCLD_ = $(am__v_CCLD_@AM_DEFAULT_V@)
 am__v_CCLD_0 = @echo "  CCLD    " $@;
 am__v_CCLD_1 = 
-SOURCES = $(h5diff_SOURCES) $(h5diffgentest_SOURCES) \
-	$(ph5diff_SOURCES)
-DIST_SOURCES = $(h5diff_SOURCES) $(h5diffgentest_SOURCES) \
-	$(ph5diff_SOURCES)
+SOURCES = $(libdynlibdiff_la_SOURCES) $(h5diff_SOURCES) \
+	$(h5diffgentest_SOURCES) $(ph5diff_SOURCES)
+DIST_SOURCES = $(am__libdynlibdiff_la_SOURCES_DIST) $(h5diff_SOURCES) \
+	$(h5diffgentest_SOURCES) $(ph5diff_SOURCES)
 am__can_run_installinfo = \
   case $$AM_UPDATE_INFO_DIR in \
     n|no|NO) false;; \
@@ -226,33 +263,6 @@ am__tty_colors = { \
     std=''; \
   fi; \
 }
-am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`;
-am__vpath_adj = case $$p in \
-    $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \
-    *) f=$$p;; \
-  esac;
-am__strip_dir = f=`echo $$p | sed -e 's|^.*/||'`;
-am__install_max = 40
-am__nobase_strip_setup = \
-  srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*|]/\\\\&/g'`
-am__nobase_strip = \
-  for p in $$list; do echo "$$p"; done | sed -e "s|$$srcdirstrip/||"
-am__nobase_list = $(am__nobase_strip_setup); \
-  for p in $$list; do echo "$$p $$p"; done | \
-  sed "s| $$srcdirstrip/| |;"' / .*\//!s/ .*/ ./; s,\( .*\)/[^/]*$$,\1,' | \
-  $(AWK) 'BEGIN { files["."] = "" } { files[$$2] = files[$$2] " " $$1; \
-    if (++n[$$2] == $(am__install_max)) \
-      { print $$2, files[$$2]; n[$$2] = 0; files[$$2] = "" } } \
-    END { for (dir in files) print dir, files[dir] }'
-am__base_list = \
-  sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \
-  sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g'
-am__uninstall_files_from_dir = { \
-  test -z "$$files" \
-    || { test ! -d "$$dir" && test ! -f "$$dir" && test ! -r "$$dir"; } \
-    || { echo " ( cd '$$dir' && rm -f" $$files ")"; \
-         $(am__cd) "$$dir" && rm -f $$files; }; \
-  }
 am__recheck_rx = ^[ 	]*:recheck:[ 	]*
 am__global_test_result_rx = ^[ 	]*:global-test-result:[ 	]*
 am__copy_in_global_log_rx = ^[ 	]*:copy-in-global-log:[ 	]*
@@ -406,10 +416,10 @@ am__test_logs2 = $(am__test_logs1:@EXEEXT@.log=.log)
 TEST_LOGS = $(am__test_logs2:.sh.log=.log)
 SH_LOG_DRIVER = $(SHELL) $(top_srcdir)/bin/test-driver
 SH_LOG_COMPILE = $(SH_LOG_COMPILER) $(AM_SH_LOG_FLAGS) $(SH_LOG_FLAGS)
-am__DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/testh5diff.sh.in \
-	$(srcdir)/testph5diff.sh.in $(top_srcdir)/bin/depcomp \
-	$(top_srcdir)/bin/mkinstalldirs $(top_srcdir)/bin/test-driver \
-	$(top_srcdir)/config/commence.am \
+am__DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/h5diff_plugin.sh.in \
+	$(srcdir)/testh5diff.sh.in $(srcdir)/testph5diff.sh.in \
+	$(top_srcdir)/bin/depcomp $(top_srcdir)/bin/mkinstalldirs \
+	$(top_srcdir)/bin/test-driver $(top_srcdir)/config/commence.am \
 	$(top_srcdir)/config/conclude.am
 DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = @ACLOCAL@
@@ -696,7 +706,7 @@ h5diff_LDFLAGS = $(LT_STATIC_EXEC) $(AM_LDFLAGS)
 
 # Test programs and scripts
 TEST_PROG = h5diffgentest
-TEST_SCRIPT = testh5diff.sh
+TEST_SCRIPT = testh5diff.sh $(am__append_1)
 check_SCRIPTS = $(TEST_SCRIPT) $(TEST_SCRIPT_PARA)
 # The parallel test script testph5diff.sh actually depends on testh5diff.sh.
 SCRIPT_DEPEND = h5diff$(EXEEXT) $(H5PDIFF) testh5diff.sh
@@ -708,6 +718,9 @@ h5diffgentest_SOURCES = h5diffgentest.c
 
 # Programs depend on the main HDF5 library and tools library
 LDADD = $(LIBH5TOOLS) $(LIBHDF5)
+@HAVE_SHARED_CONDITIONAL_TRUE@lib_LTLIBRARIES = libdynlibdiff.la
+@HAVE_SHARED_CONDITIONAL_TRUE@libdynlibdiff_la_SOURCES = dynlib_diff.c
+DISTCLEANFILES = h5diff_plugin.sh
 
 # Automake needs to be taught how to build lib, progs, and tests targets.
 # These will be filled in automatically for the most part (e.g.,
@@ -762,10 +775,50 @@ $(top_srcdir)/configure: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
 $(ACLOCAL_M4): @MAINTAINER_MODE_TRUE@ $(am__aclocal_m4_deps)
 	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
 $(am__aclocal_m4_deps):
+h5diff_plugin.sh: $(top_builddir)/config.status $(srcdir)/h5diff_plugin.sh.in
+	cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@
 testh5diff.sh: $(top_builddir)/config.status $(srcdir)/testh5diff.sh.in
 	cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@
 testph5diff.sh: $(top_builddir)/config.status $(srcdir)/testph5diff.sh.in
 	cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@
+
+install-libLTLIBRARIES: $(lib_LTLIBRARIES)
+	@$(NORMAL_INSTALL)
+	@list='$(lib_LTLIBRARIES)'; test -n "$(libdir)" || list=; \
+	list2=; for p in $$list; do \
+	  if test -f $$p; then \
+	    list2="$$list2 $$p"; \
+	  else :; fi; \
+	done; \
+	test -z "$$list2" || { \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(libdir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(libdir)" || exit 1; \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 '$(DESTDIR)$(libdir)'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 "$(DESTDIR)$(libdir)"; \
+	}
+
+uninstall-libLTLIBRARIES:
+	@$(NORMAL_UNINSTALL)
+	@list='$(lib_LTLIBRARIES)'; test -n "$(libdir)" || list=; \
+	for p in $$list; do \
+	  $(am__strip_dir) \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f '$(DESTDIR)$(libdir)/$$f'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f "$(DESTDIR)$(libdir)/$$f"; \
+	done
+
+clean-libLTLIBRARIES:
+	-test -z "$(lib_LTLIBRARIES)" || rm -f $(lib_LTLIBRARIES)
+	@list='$(lib_LTLIBRARIES)'; \
+	locs=`for p in $$list; do echo $$p; done | \
+	      sed 's|^[^/]*$$|.|; s|/[^/]*$$||; s|$$|/so_locations|' | \
+	      sort -u`; \
+	test -z "$$locs" || { \
+	  echo rm -f $${locs}; \
+	  rm -f $${locs}; \
+	}
+
+libdynlibdiff.la: $(libdynlibdiff_la_OBJECTS) $(libdynlibdiff_la_DEPENDENCIES) $(EXTRA_libdynlibdiff_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(LINK) $(am_libdynlibdiff_la_rpath) $(libdynlibdiff_la_OBJECTS) $(libdynlibdiff_la_LIBADD) $(LIBS)
 install-binPROGRAMS: $(bin_PROGRAMS)
 	@$(NORMAL_INSTALL)
 	@list='$(bin_PROGRAMS)'; test -n "$(bindir)" || list=; \
@@ -843,6 +896,7 @@ mostlyclean-compile:
 distclean-compile:
 	-rm -f *.tab.c
 
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dynlib_diff.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/h5diff_common.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/h5diff_main.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/h5diffgentest.Po@am__quote@
@@ -1113,9 +1167,11 @@ check-am: all-am
 	$(MAKE) $(AM_MAKEFLAGS) $(check_PROGRAMS) $(check_SCRIPTS)
 	$(MAKE) $(AM_MAKEFLAGS) check-TESTS
 check: check-am
-all-am: Makefile $(PROGRAMS) all-local
+all-am: Makefile $(LTLIBRARIES) $(PROGRAMS) all-local
+install-binPROGRAMS: install-libLTLIBRARIES
+
 installdirs:
-	for dir in "$(DESTDIR)$(bindir)"; do \
+	for dir in "$(DESTDIR)$(libdir)" "$(DESTDIR)$(bindir)"; do \
 	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
 	done
 install: install-am
@@ -1147,14 +1203,16 @@ clean-generic:
 distclean-generic:
 	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
 	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+	-test -z "$(DISTCLEANFILES)" || rm -f $(DISTCLEANFILES)
 
 maintainer-clean-generic:
 	@echo "This command is intended for maintainers to use"
 	@echo "it deletes files that may require special tools to rebuild."
+@HAVE_SHARED_CONDITIONAL_FALSE@install-exec-hook:
 clean: clean-am
 
 clean-am: clean-binPROGRAMS clean-checkPROGRAMS clean-generic \
-	clean-libtool mostlyclean-am
+	clean-libLTLIBRARIES clean-libtool mostlyclean-am
 
 distclean: distclean-am
 	-rm -rf ./$(DEPDIR)
@@ -1180,8 +1238,9 @@ install-dvi: install-dvi-am
 
 install-dvi-am:
 
-install-exec-am: install-binPROGRAMS
-
+install-exec-am: install-binPROGRAMS install-libLTLIBRARIES
+	@$(NORMAL_INSTALL)
+	$(MAKE) $(AM_MAKEFLAGS) install-exec-hook
 install-html: install-html-am
 
 install-html-am:
@@ -1220,25 +1279,26 @@ ps: ps-am
 
 ps-am:
 
-uninstall-am: uninstall-binPROGRAMS
+uninstall-am: uninstall-binPROGRAMS uninstall-libLTLIBRARIES
 
-.MAKE: check-am install-am install-strip
+.MAKE: check-am install-am install-exec-am install-strip
 
 .PHONY: CTAGS GTAGS TAGS all all-am all-local check check-TESTS \
 	check-am clean clean-binPROGRAMS clean-checkPROGRAMS \
-	clean-generic clean-libtool cscopelist-am ctags ctags-am \
-	distclean distclean-compile distclean-generic \
+	clean-generic clean-libLTLIBRARIES clean-libtool cscopelist-am \
+	ctags ctags-am distclean distclean-compile distclean-generic \
 	distclean-libtool distclean-tags distdir dvi dvi-am html \
 	html-am info info-am install install-am install-binPROGRAMS \
 	install-data install-data-am install-dvi install-dvi-am \
-	install-exec install-exec-am install-html install-html-am \
-	install-info install-info-am install-man install-pdf \
-	install-pdf-am install-ps install-ps-am install-strip \
-	installcheck installcheck-am installdirs maintainer-clean \
+	install-exec install-exec-am install-exec-hook install-html \
+	install-html-am install-info install-info-am \
+	install-libLTLIBRARIES install-man install-pdf install-pdf-am \
+	install-ps install-ps-am install-strip installcheck \
+	installcheck-am installdirs maintainer-clean \
 	maintainer-clean-generic mostlyclean mostlyclean-compile \
 	mostlyclean-generic mostlyclean-libtool mostlyclean-local pdf \
 	pdf-am ps ps-am recheck tags tags-am uninstall uninstall-am \
-	uninstall-binPROGRAMS
+	uninstall-binPROGRAMS uninstall-libLTLIBRARIES
 
 .PRECIOUS: Makefile
 
@@ -1254,6 +1314,11 @@ uninstall-am: uninstall-binPROGRAMS
 help:
 	@$(top_srcdir)/bin/makehelp
 
+@HAVE_SHARED_CONDITIONAL_TRUE@  # Build it as shared library if configure is enabled for shared library.
+
+@HAVE_SHARED_CONDITIONAL_TRUE@install-exec-hook:
+@HAVE_SHARED_CONDITIONAL_TRUE@	$(RM) $(DESTDIR)$(libdir)/*dynlib*
+
 # lib/progs/tests targets recurse into subdirectories. build-* targets
 # build files in this directory.
 build-lib: $(LIB)
diff --git a/tools/h5diff/dynlib_diff.c b/tools/h5diff/dynlib_diff.c
new file mode 100644
index 0000000..0d8be2b
--- /dev/null
+++ b/tools/h5diff/dynlib_diff.c
@@ -0,0 +1,94 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5. The full HDF5 copyright notice, including      *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic document set and is     *
+ * linked from the top-level documents page.  It can also be found at        *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have access   *
+ * to either file, you may request a copy from help@hdfgroup.org.            *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+/*
+ * Programmer:	Raymond Lu
+ *		13 February 2013
+ *
+ * Purpose:	Tests the plugin module (H5PL)
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include "H5PLextern.h"
+
+#define H5Z_FILTER_DYNLIB2      258 
+#define MULTIPLIER              3
+
+static size_t H5Z_filter_dynlib2(unsigned int flags, size_t cd_nelmts,
+                const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf);
+
+/* This message derives from H5Z */
+const H5Z_class2_t H5Z_DYNLIB2[1] = {{
+    H5Z_CLASS_T_VERS,                /* H5Z_class_t version             */
+    H5Z_FILTER_DYNLIB2,		     /* Filter id number		*/
+    1, 1,                            /* Encoding and decoding enabled   */
+    "dynlib2",			     /* Filter name for debugging	*/
+    NULL,                            /* The "can apply" callback        */
+    NULL,                            /* The "set local" callback        */
+    (H5Z_func_t)H5Z_filter_dynlib2,    /* The actual filter function	*/
+}};
+
+H5PL_type_t   H5PLget_plugin_type(void) {return H5PL_TYPE_FILTER;}
+const void   *H5PLget_plugin_info(void) {return H5Z_DYNLIB2;}
+
+/*-------------------------------------------------------------------------
+ * Function:	H5Z_filter_dynlib2
+ *
+ * Purpose:	A dynlib2 filter method that multiplies the original value 
+ *              during write and divide the original value during read. It
+ *              will be built as a shared library.  plugin.c test will load 
+ *              and use this filter library.    
+ *
+ * Return:	Success:	Data chunk size
+ *
+ *		Failure:	0
+ *
+ * Programmer:	Raymond Lu
+ *              29 March 2013
+ *
+ *-------------------------------------------------------------------------
+ */
+static size_t
+H5Z_filter_dynlib2(unsigned int flags, size_t cd_nelmts,
+      const unsigned int *cd_values, size_t nbytes,
+      size_t *buf_size, void **buf)
+{
+    int *int_ptr = (int *)*buf;          /* Pointer to the data values */
+    size_t buf_left = *buf_size;  /* Amount of data buffer left to process */
+
+    /* Check for the correct number of parameters */
+    if(cd_nelmts > 0)
+        return(0);
+
+    /* Assignment to eliminate unused parameter warning. */
+    cd_values = cd_values;
+
+    if(flags & H5Z_FLAG_REVERSE) { /*read*/
+        /* Divide the original value with MULTIPLIER */
+        while(buf_left > 0) {
+            *int_ptr++ /= MULTIPLIER;
+            buf_left -= sizeof(int);
+        } /* end while */
+    } /* end if */
+    else { /*write*/
+        /* Multiply the original value with MULTIPLIER */
+        while(buf_left > 0) {
+            *int_ptr++ *= MULTIPLIER;
+            buf_left -= sizeof(int);
+        } /* end while */
+    } /* end else */
+
+    return nbytes;
+} /* end H5Z_filter_dynlib2() */
+
diff --git a/tools/h5diff/h5diff_plugin.sh.in b/tools/h5diff/h5diff_plugin.sh.in
new file mode 100644
index 0000000..3f39d4c
--- /dev/null
+++ b/tools/h5diff/h5diff_plugin.sh.in
@@ -0,0 +1,299 @@
+#! /bin/sh
+#
+# Copyright by The HDF Group.
+# All rights reserved.
+#
+# This file is part of HDF5. The full HDF5 copyright notice, including
+# terms governing use, modification, and redistribution, is contained in
+# the files COPYING and Copyright.html.  COPYING can be found at the root
+# of the source code distribution tree; Copyright.html can be found at the
+# root level of an installed copy of the electronic document set and is
+# linked from the top-level documents page.  It can also be found at
+# http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have access
+# to either file, you may request a copy from help@hdfgroup.org.
+#
+srcdir=@srcdir@
+TOP_BUILDDIR=@top_builddir@
+
+# Determine backward compatibility options enabled
+DEPRECATED_SYMBOLS="@DEPRECATED_SYMBOLS@"
+
+EXIT_SUCCESS=0
+EXIT_FAILURE=1
+
+H5DIFF=h5diff               # The tool name
+H5DIFF_BIN=`pwd`/$H5DIFF    # The path of the tool binary
+
+nerrors=0
+verbose=yes
+h5haveexitcode=yes        # default is yes
+
+TEST_NAME=h5diff_ud_plugin
+FROM_DIR=`pwd`/.libs
+PLUGIN_LIB="$FROM_DIR/libdynlibdiff.*"
+PLUGIN_LIBDIR=testdir3
+
+RM='rm -rf'
+CMP='cmp -s'
+DIFF='diff -c'
+CP='cp'
+DIRNAME='dirname'
+LS='ls'
+AWK='awk'
+
+# source dirs
+SRC_TOOLS="$srcdir/.."
+
+# testfiles source dirs for tools
+SRC_H5DIFF_TESTFILES="$SRC_TOOLS/h5diff/testfiles"
+
+TESTDIR=./testplug
+test -d $TESTDIR || mkdir $TESTDIR
+
+######################################################################
+# test files
+# --------------------------------------------------------------------
+# All the test files copy from source directory to test directory
+# NOTE: Keep this framework to add/remove test files.
+#       Any test files from other tools can be used in this framework.
+#       This list are also used for checking exist.
+#       Comment '#' without space can be used.
+# --------------------------------------------------------------------
+LIST_HDF5_TEST_FILES="
+$SRC_H5DIFF_TESTFILES/tudfilter.h5
+$SRC_H5DIFF_TESTFILES/tudfilter2.h5
+$SRC_H5DIFF_TESTFILES/h5diff_ud.txt
+$SRC_H5DIFF_TESTFILES/h5diff_udfail.txt
+"
+
+# Main Body
+# Create test directories if not exists yet.
+test -d $PLUGIN_LIBDIR || mkdir -p $PLUGIN_LIBDIR
+if [ $? != 0 ]; then
+    echo "Failed to create test directory($PLUGIN_LIBDIR)"
+    exit $EXIT_FAILURE
+fi
+
+# copy plugin library for test
+$CP $PLUGIN_LIB $PLUGIN_LIBDIR
+if [ $? != 0 ]; then
+    echo "Failed to copy plugin library ($PLUGIN_LIB) for test."
+    exit $EXIT_FAILURE
+fi
+
+# setup plugin path
+ENVCMD="env HDF5_PLUGIN_PATH=../${PLUGIN_LIBDIR}"
+
+#
+# copy test files and expected output files from source dirs to test dir
+#
+COPY_TESTFILES="$LIST_HDF5_TEST_FILES"
+
+COPY_TESTFILES_TO_TESTDIR()
+{
+    # copy test files. Used -f to make sure get a new copy
+    for tstfile in $COPY_TESTFILES
+    do
+        # ignore '#' comment
+        echo $tstfile | tr -d ' ' | grep '^#' > /dev/null
+        RET=$?
+        if [ $RET -eq 1 ]; then
+            # skip cp if srcdir is same as destdir
+            # this occurs when build/test performed in source dir and
+            # make cp fail
+            SDIR=`$DIRNAME $tstfile`
+            INODE_SDIR=`$LS -i -d $SDIR | $AWK -F' ' '{print $1}'`
+            INODE_DDIR=`$LS -i -d $TESTDIR | $AWK -F' ' '{print $1}'`
+            if [ "$INODE_SDIR" != "$INODE_DDIR" ]; then
+              $CP -f $tstfile $TESTDIR
+                if [ $? -ne 0 ]; then
+                    echo "Error: FAILED to copy $tstfile ."
+
+                    # Comment out this to CREATE expected file
+                    exit $EXIT_FAILURE
+                fi
+            fi
+        fi
+    done
+}
+
+CLEAN_TESTFILES_AND_TESTDIR()
+{
+    # skip rm if srcdir is same as destdir
+    # this occurs when build/test performed in source dir and
+    # make cp fail
+    SDIR=$SRC_H5DIFF_TESTFILES
+    INODE_SDIR=`$LS -i -d $SDIR | $AWK -F' ' '{print $1}'`
+    INODE_DDIR=`$LS -i -d $TESTDIR | $AWK -F' ' '{print $1}'`
+    if [ "$INODE_SDIR" != "$INODE_DDIR" ]; then
+        $RM $TESTDIR
+    fi
+}
+
+# Parse option
+#   -p   run ph5diff tests
+#   -h   print help page
+while [ $# -gt 0 ]; do
+    case "$1" in
+    -p)	# reset the tool name and bin to run ph5diff tests
+	TESTNAME=ph5diff
+	H5DIFF=ph5diff               # The tool name
+	H5DIFF_BIN=`pwd`/$H5DIFF
+	pmode=yes
+	shift
+	;;
+    -h) # print help page
+    echo "$0 [-p] [-h]"
+    echo "    -p   run ph5diff tests"
+    echo "    -h   print help page"
+    shift
+    exit 0
+    ;;
+    *)  # unknown option
+        echo "$0: Unknown option ($1)"
+    exit 1
+    ;;
+    esac
+done
+
+# RUNSERIAL is used. Check if it can return exit code from executalbe correctly.
+if [ -n "$RUNSERIAL_NOEXITCODE" ]; then
+    echo "***Warning*** Serial Exit Code is not passed back to shell corretly."
+    echo "***Warning*** Exit code checking is skipped."
+    h5haveexitcode=no
+fi
+
+# Print a line-line message left justified in a field of 70 characters
+# beginning with the word "Testing".
+#
+TESTING() {
+   SPACES="                                                               "
+   echo "Testing $* $SPACES" | cut -c1-70 | tr -d '\012'
+}
+
+# Source in the output filter function definitions.
+. $srcdir/../../bin/output_filter.sh
+
+# Run a test and print PASS or *FAIL*.  If a test fails then increment
+# the `nerrors' global variable and (if $verbose is set) display the
+# difference between the actual output and the expected output. The
+# expected output is given as the first argument to this function and
+# the actual output file is calculated by replacing the `.ddl' with
+# `.out'.  The actual output is not removed if $HDF5_NOCLEANUP has a
+# non-zero value.
+#
+# Need eval before the RUNCMD command because some machines like
+# AIX, has RUNPARALLEL in the style as
+#   MP_PROCS=3 MP_TASKS_PER_NODE=3 poe ./a.out
+# that throws the shell script off.
+#
+TOOLTEST() {
+    expect="$TESTDIR/$1"
+    actual="$TESTDIR/`basename $1 .txt`.out"
+    actual_err="$TESTDIR/`basename $1 .txt`.err"
+    actual_sav=${actual}-sav
+    actual_err_sav=${actual_err}-sav
+    shift
+    if test -n "$pmode"; then
+        RUNCMD=$RUNPARALLEL
+    else
+        RUNCMD=$RUNSERIAL
+    fi
+
+    # Run test.
+    TESTING $H5DIFF $@
+    (
+    #echo "#############################"
+    #echo "Expected output for '$H5DIFF $@'"
+    #echo "#############################"
+    cd $TESTDIR
+    eval $ENVCMD $RUNCMD $H5DIFF_BIN "$@"
+    ) >$actual 2>$actual_err
+    EXIT_CODE=$?
+    # save actual and actual_err in case they are needed later.
+    cp $actual $actual_sav
+    STDOUT_FILTER $actual
+    cp $actual_err $actual_err_sav
+    STDERR_FILTER $actual_err
+    cat $actual_err >> $actual
+    # don't add exit code check in pmode, as it causes failure. (exit code
+    # is from mpirun not tool)
+    # if any problem occurs relate to an exit code, it will be caught in
+    # serial mode, so the test is fullfilled.
+    if test $h5haveexitcode = 'yes' -a -z "$pmode"; then
+      echo "EXIT CODE: $EXIT_CODE" >> $actual
+    fi
+
+    if [ ! -f $expect ]; then
+        # Create the expect file if it doesn't yet exist.
+        echo " CREATED"
+        cp $actual $expect
+    elif $CMP $expect $actual; then
+        echo " PASSED"
+    elif test $h5haveexitcode = 'yes' -a -z "$pmode"; then
+        echo "*FAILED*"
+        echo "    Expected result ($expect) differs from actual result ($actual)"
+        nerrors="`expr $nerrors + 1`"
+        test yes = "$verbose" && $DIFF $expect $actual |sed 's/^/    /'
+    else
+        # parallel mode output are often of different ordering from serial
+        # output.  If the sorted expected and actual files compare the same,
+        # it is safe to assume the actual output match the expected file.
+        expect_sorted=expect_sorted
+        actual_sorted=actual_sorted
+        sort $expect -o $expect_sorted
+        sort $actual -o $actual_sorted
+        # remove "EXIT CODE:" line from expect file. test for exit code
+        # is done by serial mode.
+        grep -v "EXIT CODE:" $expect_sorted > $expect_sorted.noexit
+        mv $expect_sorted.noexit $expect_sorted
+    if $CMP $expect_sorted $actual_sorted; then
+        echo " PASSED"
+    else
+        echo "*FAILED*"
+        nerrors="`expr $nerrors + 1`"
+        if test yes = "$verbose"; then
+        echo "====Expected result ($expect_sorted) differs from actual result ($actual_sorted)"
+        $DIFF $expect_sorted $actual_sorted |sed 's/^/    /'
+        echo "====The actual output ($actual_sav)"
+        sed 's/^/    /' < $actual_sav
+        echo "====The actual stderr ($actual_err_sav)"
+        sed 's/^/    /' < $actual_err_sav
+        echo "====End of actual stderr ($actual_err_sav)"
+        echo ""
+        fi
+    fi
+    fi
+
+    # Clean up output file
+    if test -z "$HDF5_NOCLEANUP"; then
+      rm -f $actual $actual_err $actual_sav $actual_err_sav
+      rm -f $actual_sorted $expect_sorted
+    fi
+}
+
+##############################################################################
+###           T H E   T E S T S
+##############################################################################
+# prepare for test
+COPY_TESTFILES_TO_TESTDIR
+
+# Run the test
+TOOLTEST h5diff_ud.txt -v tudfilter.h5 tudfilter2.h5
+
+# print results
+if test $nerrors -ne 0 ; then
+    echo "$nerrors errors encountered"
+    exit_code=$EXIT_FAILURE
+else
+    echo "All Plugin API tests passed."
+    exit_code=$EXIT_SUCCESS
+fi
+
+# Clean up temporary files/directories
+CLEAN_TESTFILES_AND_TESTDIR
+
+# Clean up temporary files/directories and leave
+$RM $PLUGIN_LIBDIR
+
+exit $exit_code
diff --git a/tools/h5diff/testfiles/h5diff_ud.txt b/tools/h5diff/testfiles/h5diff_ud.txt
new file mode 100644
index 0000000..7c9bb5e
--- /dev/null
+++ b/tools/h5diff/testfiles/h5diff_ud.txt
@@ -0,0 +1,11 @@
+
+file1     file2
+---------------------------------------
+    x      x    /              
+    x      x    /dynlib2       
+
+group  : </> and </>
+0 differences found
+dataset: </dynlib2> and </dynlib2>
+0 differences found
+EXIT CODE: 0
diff --git a/tools/h5diff/testfiles/h5diff_udfail.txt b/tools/h5diff/testfiles/h5diff_udfail.txt
new file mode 100644
index 0000000..7eb1155
--- /dev/null
+++ b/tools/h5diff/testfiles/h5diff_udfail.txt
@@ -0,0 +1,12 @@
+
+file1     file2
+---------------------------------------
+    x      x    /              
+    x      x    /dynlib2       
+
+group  : </> and </>
+0 differences found
+dataset: </dynlib2> and </dynlib2>
+0 differences found
+warning: dataset </dynlib2> cannot be read, user defined filter is not available
+EXIT CODE: 2
diff --git a/tools/h5diff/testfiles/tudfilter.h5 b/tools/h5diff/testfiles/tudfilter.h5
new file mode 100644
index 0000000..a1f6d80
--- /dev/null
+++ b/tools/h5diff/testfiles/tudfilter.h5
diff --git a/tools/h5diff/testfiles/tudfilter2.h5 b/tools/h5diff/testfiles/tudfilter2.h5
new file mode 100644
index 0000000..a1f6d80
--- /dev/null
+++ b/tools/h5diff/testfiles/tudfilter2.h5
diff --git a/tools/h5diff/testh5diff.sh.in b/tools/h5diff/testh5diff.sh.in
index 3be0b80..5748128 100644
--- a/tools/h5diff/testh5diff.sh.in
+++ b/tools/h5diff/testh5diff.sh.in
@@ -331,10 +331,10 @@ COPY_TESTFILES_TO_TESTDIR()
             INODE_SDIR=`$LS -i -d $SDIR | $AWK -F' ' '{print $1}'`
             INODE_DDIR=`$LS -i -d $TESTDIR | $AWK -F' ' '{print $1}'`
             if [ "$INODE_SDIR" != "$INODE_DDIR" ]; then
-    	        $CP -f $tstfile $TESTDIR
+              $CP -f $tstfile $TESTDIR
                 if [ $? -ne 0 ]; then
                     echo "Error: FAILED to copy $tstfile ."
-                
+
                     # Comment out this to CREATE expected file
                     exit $EXIT_FAILURE
                 fi
@@ -348,7 +348,7 @@ CLEAN_TESTFILES_AND_TESTDIR()
     # skip rm if srcdir is same as destdir
     # this occurs when build/test performed in source dir and
     # make cp fail
-    SDIR=`$DIRNAME $tstfile`
+    SDIR=$SRC_H5DIFF_TESTFILES
     INODE_SDIR=`$LS -i -d $SDIR | $AWK -F' ' '{print $1}'`
     INODE_DDIR=`$LS -i -d $TESTDIR | $AWK -F' ' '{print $1}'`
     if [ "$INODE_SDIR" != "$INODE_DDIR" ]; then
@@ -369,16 +369,16 @@ while [ $# -gt 0 ]; do
 	shift
 	;;
     -h) # print help page
-	echo "$0 [-p] [-h]"
-	echo "    -p   run ph5diff tests"
-	echo "    -h   print help page"
-	shift
-	exit 0
-	;;
+    echo "$0 [-p] [-h]"
+    echo "    -p   run ph5diff tests"
+    echo "    -h   print help page"
+    shift
+    exit 0
+    ;;
     *)  # unknown option
         echo "$0: Unknown option ($1)"
-	exit 1
-	;;
+    exit 1
+    ;;
     esac
 done
 
@@ -429,11 +429,11 @@ TOOLTEST() {
     # Run test.
     TESTING $H5DIFF $@
     (
-	#echo "#############################"
-	#echo "Expected output for '$H5DIFF $@'" 
-	#echo "#############################"
-	cd $TESTDIR
-	eval $RUNCMD $H5DIFF_BIN "$@"
+    #echo "#############################"
+    #echo "Expected output for '$H5DIFF $@'"
+    #echo "#############################"
+    cd $TESTDIR
+    eval $RUNCMD $H5DIFF_BIN "$@"
     ) >$actual 2>$actual_err
     EXIT_CODE=$?
     # save actual and actual_err in case they are needed later.
@@ -442,9 +442,9 @@ TOOLTEST() {
     cp $actual_err $actual_err_sav
     STDERR_FILTER $actual_err
     cat $actual_err >> $actual
-    # don't add exit code check in pmode, as it causes failure. (exit code 
+    # don't add exit code check in pmode, as it causes failure. (exit code
     # is from mpirun not tool)
-    # if any problem occurs relate to an exit code, it will be caught in 
+    # if any problem occurs relate to an exit code, it will be caught in
     # serial mode, so the test is fullfilled.
     if test $h5haveexitcode = 'yes' -a -z "$pmode"; then
       echo "EXIT CODE: $EXIT_CODE" >> $actual
@@ -462,7 +462,7 @@ TOOLTEST() {
         nerrors="`expr $nerrors + 1`"
         test yes = "$verbose" && $DIFF $expect $actual |sed 's/^/    /'
     else
-	    # parallel mode output are often of different ordering from serial
+        # parallel mode output are often of different ordering from serial
         # output.  If the sorted expected and actual files compare the same,
         # it is safe to assume the actual output match the expected file.
         expect_sorted=expect_sorted
@@ -473,44 +473,44 @@ TOOLTEST() {
         # is done by serial mode.
         grep -v "EXIT CODE:" $expect_sorted > $expect_sorted.noexit
         mv $expect_sorted.noexit $expect_sorted
-	if $CMP $expect_sorted $actual_sorted; then
-	    echo " PASSED"
-	else
-	    echo "*FAILED*"
-	    nerrors="`expr $nerrors + 1`"
-	    if test yes = "$verbose"; then
-		echo "====Expected result ($expect_sorted) differs from actual result ($actual_sorted)"
-		$DIFF $expect_sorted $actual_sorted |sed 's/^/    /'
-		echo "====The actual output ($actual_sav)"
-		sed 's/^/    /' < $actual_sav 
-		echo "====The actual stderr ($actual_err_sav)"
-		sed 's/^/    /' < $actual_err_sav 
-		echo "====End of actual stderr ($actual_err_sav)"
-		echo ""
-	    fi
-	fi
+    if $CMP $expect_sorted $actual_sorted; then
+        echo " PASSED"
+    else
+        echo "*FAILED*"
+        nerrors="`expr $nerrors + 1`"
+        if test yes = "$verbose"; then
+        echo "====Expected result ($expect_sorted) differs from actual result ($actual_sorted)"
+        $DIFF $expect_sorted $actual_sorted |sed 's/^/    /'
+        echo "====The actual output ($actual_sav)"
+        sed 's/^/    /' < $actual_sav
+        echo "====The actual stderr ($actual_err_sav)"
+        sed 's/^/    /' < $actual_err_sav
+        echo "====End of actual stderr ($actual_err_sav)"
+        echo ""
+        fi
+    fi
     fi
 
     # Clean up output file
     if test -z "$HDF5_NOCLEANUP"; then
-	    rm -f $actual $actual_err $actual_sav $actual_err_sav
-    	rm -f $actual_sorted $expect_sorted
+      rm -f $actual $actual_err $actual_sav $actual_err_sav
+      rm -f $actual_sorted $expect_sorted
     fi
 }
 
 
 # Print a "SKIP" message
 SKIP() {
-	 TESTING $H5DIFF $@
-	  echo  " -SKIP-"
+   TESTING $H5DIFF $@
+    echo  " -SKIP-"
 }
 
 
 
 ##############################################################################
-# The tests 
+# The tests
 # To avoid the printing of the complete full path of the test file, that hides
-# all the other parameters for long paths, the printing of the command line 
+# all the other parameters for long paths, the printing of the command line
 # is done first in
 # TESTING with the name only of the test file $TOOL, not its full path $TESTFILE
 ##############################################################################
@@ -525,13 +525,13 @@ COPY_TESTFILES_TO_TESTDIR
 TOOLTEST h5diff_10.txt -h
 
 # 1.1 normal mode
-TOOLTEST h5diff_11.txt  h5diff_basic1.h5 h5diff_basic2.h5 
+TOOLTEST h5diff_11.txt  h5diff_basic1.h5 h5diff_basic2.h5
 
 # 1.2 normal mode with objects
 TOOLTEST h5diff_12.txt  h5diff_basic1.h5 h5diff_basic2.h5  g1/dset1 g1/dset2
 
 # 1.3 report mode
-TOOLTEST h5diff_13.txt -r h5diff_basic1.h5 h5diff_basic2.h5 
+TOOLTEST h5diff_13.txt -r h5diff_basic1.h5 h5diff_basic2.h5
 
 # 1.4 report  mode with objects
 TOOLTEST h5diff_14.txt  -r h5diff_basic1.h5 h5diff_basic2.h5 g1/dset1 g1/dset2
@@ -549,7 +549,7 @@ TOOLTEST h5diff_16_2.txt --verbose --relative=0.02 h5diff_basic1.h5 h5diff_basic
 TOOLTEST h5diff_16_3.txt -v -p 0.02 h5diff_basic1.h5 h5diff_basic1.h5 g1/dset9 g1/dset10
 
 # 1.7 verbose mode
-TOOLTEST h5diff_17.txt -v h5diff_basic1.h5 h5diff_basic2.h5   
+TOOLTEST h5diff_17.txt -v h5diff_basic1.h5 h5diff_basic2.h5
 
 # 1.7 test 32-bit INFINITY
 TOOLTEST h5diff_171.txt -v h5diff_basic1.h5 h5diff_basic1.h5 /g1/fp19 /g1/fp19_COPY
@@ -557,8 +557,8 @@ TOOLTEST h5diff_171.txt -v h5diff_basic1.h5 h5diff_basic1.h5 /g1/fp19 /g1/fp19_C
 # 1.7 test 64-bit INFINITY
 TOOLTEST h5diff_172.txt -v h5diff_basic1.h5 h5diff_basic1.h5 /g1/fp20 /g1/fp20_COPY
 
-# 1.8 quiet mode 
-TOOLTEST h5diff_18.txt -q h5diff_basic1.h5 h5diff_basic2.h5 
+# 1.8 quiet mode
+TOOLTEST h5diff_18.txt -q h5diff_basic1.h5 h5diff_basic2.h5
 
 # 1.8 -v and -q
 TOOLTEST h5diff_18_1.txt -v -q h5diff_basic1.h5 h5diff_basic2.h5
@@ -588,7 +588,7 @@ TOOLTEST h5diff_23.txt -v h5diff_types.h5 h5diff_types.h5 g1 g1
 TOOLTEST h5diff_24.txt -v h5diff_types.h5 h5diff_types.h5 t1 t1
 
 # 2.5
-TOOLTEST h5diff_25.txt -v h5diff_types.h5 h5diff_types.h5 l1 l1 
+TOOLTEST h5diff_25.txt -v h5diff_types.h5 h5diff_types.h5 l1 l1
 
 # 2.6
 TOOLTEST h5diff_26.txt -v h5diff_types.h5 h5diff_types.h5 g1 g2
@@ -642,7 +642,7 @@ TOOLTEST h5diff_57.txt -v h5diff_dtypes.h5 h5diff_dtypes.h5 dset7a dset7b
 # 5.8 (region reference)
 TOOLTEST h5diff_58.txt -v h5diff_dset1.h5 h5diff_dset2.h5 refreg
 
-# test for both dset and attr with same type but with different size 
+# test for both dset and attr with same type but with different size
 # ( HDDFV-7942 )
 TOOLTEST h5diff_59.txt -v h5diff_dtypes.h5 h5diff_dtypes.h5 dset11a dset11b
 
@@ -652,14 +652,14 @@ TOOLTEST h5diff_59.txt -v h5diff_dtypes.h5 h5diff_dtypes.h5 dset11a dset11b
 
 
 # 6.0: Check if the command line number of arguments is less than 3
-TOOLTEST h5diff_600.txt h5diff_basic1.h5 
+TOOLTEST h5diff_600.txt h5diff_basic1.h5
 
-# 6.1: Check if non-exist object name is specified 
+# 6.1: Check if non-exist object name is specified
 TOOLTEST h5diff_601.txt h5diff_basic1.h5 h5diff_basic1.h5 nono_obj
 
 
 # ##############################################################################
-# # -d 
+# # -d
 # ##############################################################################
 
 
@@ -678,7 +678,7 @@ TOOLTEST h5diff_606.txt -d 0x1 h5diff_basic1.h5 h5diff_basic2.h5 g1/dset3 g1/dse
 # 6.7: string
 TOOLTEST h5diff_607.txt -d "1" h5diff_basic1.h5 h5diff_basic2.h5 g1/dset3 g1/dset4
 
-# 6.8: use system epsilon 
+# 6.8: use system epsilon
 TOOLTEST h5diff_608.txt --use-system-epsilon h5diff_basic1.h5 h5diff_basic2.h5  g1/dset3 g1/dset4
 
 # 6.9: number larger than biggest difference
@@ -762,7 +762,7 @@ TOOLTEST h5diff_631.txt -v --use-system-epsilon h5diff_basic1.h5 h5diff_basic1.h
 # ##############################################################################
 # 7.  attributes
 # ##############################################################################
-TOOLTEST h5diff_70.txt -v h5diff_attr1.h5 h5diff_attr2.h5 
+TOOLTEST h5diff_70.txt -v h5diff_attr1.h5 h5diff_attr2.h5
 # temporary test to verify HDF5-8625
 TOOLTEST h5diff_tmp1.txt tmptest2.he5 tmptest.he5
 # temporary test to verify HDF5-8639
@@ -772,10 +772,10 @@ TOOLTEST h5diff_tmp2.txt tmpSingleSiteBethe.output.h5 tmpSingleSiteBethe.referen
 #  attrs with verbose option level
 # ##################################################
 
-TOOLTEST h5diff_700.txt -v1 h5diff_attr1.h5 h5diff_attr2.h5 
-TOOLTEST h5diff_701.txt -v2 h5diff_attr1.h5 h5diff_attr2.h5 
-TOOLTEST h5diff_702.txt --verbose=1 h5diff_attr1.h5 h5diff_attr2.h5 
-TOOLTEST h5diff_703.txt --verbose=2 h5diff_attr1.h5 h5diff_attr2.h5 
+TOOLTEST h5diff_700.txt -v1 h5diff_attr1.h5 h5diff_attr2.h5
+TOOLTEST h5diff_701.txt -v2 h5diff_attr1.h5 h5diff_attr2.h5
+TOOLTEST h5diff_702.txt --verbose=1 h5diff_attr1.h5 h5diff_attr2.h5
+TOOLTEST h5diff_703.txt --verbose=2 h5diff_attr1.h5 h5diff_attr2.h5
 
 # same attr number , all same attr name
 TOOLTEST h5diff_704.txt -v2 h5diff_attr_v_level1.h5 h5diff_attr_v_level2.h5 /g
@@ -789,7 +789,7 @@ TOOLTEST h5diff_706.txt -v2 h5diff_attr_v_level1.h5 h5diff_attr_v_level2.h5 /nty
 # different attr number , same attr name (intersected)
 TOOLTEST h5diff_707.txt -v2 h5diff_attr_v_level1.h5 h5diff_attr_v_level2.h5 /g2
 
-# different attr number , all different attr name 
+# different attr number , all different attr name
 TOOLTEST h5diff_708.txt -v2 h5diff_attr_v_level1.h5 h5diff_attr_v_level2.h5 /g3
 
 # when no attributes exist in both objects
@@ -801,32 +801,32 @@ TOOLTEST h5diff_710.txt -v2 h5diff_attr_v_level1.h5 h5diff_attr_v_level2.h5
 # ##############################################################################
 # 8.  all dataset datatypes
 # ##############################################################################
-TOOLTEST h5diff_80.txt -v h5diff_dset1.h5 h5diff_dset2.h5 
+TOOLTEST h5diff_80.txt -v h5diff_dset1.h5 h5diff_dset2.h5
 
 # 9. compare a file with itself
 TOOLTEST h5diff_90.txt -v h5diff_basic2.h5 h5diff_basic2.h5
 
 # 10. read by hyperslab, print indexes
-TOOLTEST h5diff_100.txt -v h5diff_hyper1.h5 h5diff_hyper2.h5 
+TOOLTEST h5diff_100.txt -v h5diff_hyper1.h5 h5diff_hyper2.h5
 
 # 11. floating point comparison
 # double value
-TOOLTEST h5diff_101.txt -v h5diff_basic1.h5 h5diff_basic1.h5 g1/d1  g1/d2 
+TOOLTEST h5diff_101.txt -v h5diff_basic1.h5 h5diff_basic1.h5 g1/d1  g1/d2
 
 # float value
-TOOLTEST h5diff_102.txt -v h5diff_basic1.h5 h5diff_basic1.h5 g1/fp1 g1/fp2 
+TOOLTEST h5diff_102.txt -v h5diff_basic1.h5 h5diff_basic1.h5 g1/fp1 g1/fp2
 
-# with --use-system-epsilon for double value 
-TOOLTEST h5diff_103.txt -v --use-system-epsilon h5diff_basic1.h5 h5diff_basic1.h5 g1/d1  g1/d2 
+# with --use-system-epsilon for double value
+TOOLTEST h5diff_103.txt -v --use-system-epsilon h5diff_basic1.h5 h5diff_basic1.h5 g1/d1  g1/d2
 
 # with --use-system-epsilon for float value
-TOOLTEST h5diff_104.txt -v --use-system-epsilon h5diff_basic1.h5 h5diff_basic1.h5 g1/fp1 g1/fp2 
+TOOLTEST h5diff_104.txt -v --use-system-epsilon h5diff_basic1.h5 h5diff_basic1.h5 g1/fp1 g1/fp2
 
 
 # not comparable -c flag
-TOOLTEST h5diff_200.txt h5diff_basic2.h5 h5diff_basic2.h5 g2/dset1  g2/dset2 
+TOOLTEST h5diff_200.txt h5diff_basic2.h5 h5diff_basic2.h5 g2/dset1  g2/dset2
 
-TOOLTEST h5diff_201.txt -c h5diff_basic2.h5 h5diff_basic2.h5 g2/dset1  g2/dset2 
+TOOLTEST h5diff_201.txt -c h5diff_basic2.h5 h5diff_basic2.h5 g2/dset1  g2/dset2
 
 TOOLTEST h5diff_202.txt -c h5diff_basic2.h5 h5diff_basic2.h5 g2/dset2  g2/dset3
 
@@ -842,9 +842,9 @@ TOOLTEST h5diff_206.txt -c h5diff_basic2.h5 h5diff_basic2.h5 g2/dset7  g2/dset8
 TOOLTEST h5diff_207.txt -c h5diff_basic2.h5 h5diff_basic2.h5 g2/dset8  g2/dset9
 
 # not comparable in dataspace of zero dimension size
-TOOLTEST h5diff_208.txt -c h5diff_dset_zero_dim_size1.h5 h5diff_dset_zero_dim_size2.h5 
+TOOLTEST h5diff_208.txt -c h5diff_dset_zero_dim_size1.h5 h5diff_dset_zero_dim_size2.h5
 
-# non-comparable dataset with comparable attribute, and other comparable datasets. 
+# non-comparable dataset with comparable attribute, and other comparable datasets.
 # Also test non-compatible attributes with different type, dimention, rank.
 # All the comparables should display differences.
 TOOLTEST h5diff_220.txt -c non_comparables1.h5 non_comparables2.h5 /g1
@@ -862,7 +862,7 @@ TOOLTEST h5diff_222.txt -c non_comparables1.h5 non_comparables2.h5
 TOOLTEST h5diff_223.txt -c non_comparables1.h5 non_comparables2.h5 /diffobjtypes
 # swap files
 TOOLTEST h5diff_224.txt -c non_comparables2.h5 non_comparables1.h5 /diffobjtypes
-    
+
 # ##############################################################################
 # # Links compare without --follow-symlinks nor --no-dangling-links
 # ##############################################################################
@@ -958,28 +958,28 @@ TOOLTEST h5diff_425.txt --follow-symlinks -v h5diff_ext2softlink_src.h5 h5diff_e
 TOOLTEST h5diff_450.txt  --follow-symlinks -v h5diff_danglelinks1.h5 h5diff_danglelinks2.h5
 
 # dangling links --follow-symlinks and --no-dangling-links (FILE to FILE)
-TOOLTEST h5diff_451.txt  --follow-symlinks -v --no-dangling-links  h5diff_danglelinks1.h5 h5diff_danglelinks2.h5 
+TOOLTEST h5diff_451.txt  --follow-symlinks -v --no-dangling-links  h5diff_danglelinks1.h5 h5diff_danglelinks2.h5
 
 # try --no-dangling-links without --follow-symlinks options
 TOOLTEST h5diff_452.txt  --no-dangling-links  h5diff_softlinks.h5 h5diff_softlinks.h5
 
 # dangling link found for soft links (FILE to FILE)
-TOOLTEST h5diff_453.txt  --follow-symlinks -v --no-dangling-links  h5diff_softlinks.h5 h5diff_softlinks.h5  
+TOOLTEST h5diff_453.txt  --follow-symlinks -v --no-dangling-links  h5diff_softlinks.h5 h5diff_softlinks.h5
 
 # dangling link found for soft links (obj to obj)
-TOOLTEST h5diff_454.txt  --follow-symlinks -v --no-dangling-links  h5diff_softlinks.h5 h5diff_softlinks.h5 /softlink_dset2 /softlink_noexist 
+TOOLTEST h5diff_454.txt  --follow-symlinks -v --no-dangling-links  h5diff_softlinks.h5 h5diff_softlinks.h5 /softlink_dset2 /softlink_noexist
 
 # dangling link found for soft links (obj to obj) Both dangle links
-TOOLTEST h5diff_455.txt  --follow-symlinks -v --no-dangling-links  h5diff_softlinks.h5 h5diff_softlinks.h5 /softlink_noexist /softlink_noexist 
+TOOLTEST h5diff_455.txt  --follow-symlinks -v --no-dangling-links  h5diff_softlinks.h5 h5diff_softlinks.h5 /softlink_noexist /softlink_noexist
 
 # dangling link found for ext links (FILE to FILE)
-TOOLTEST h5diff_456.txt  --follow-symlinks -v --no-dangling-links  h5diff_extlink_src.h5 h5diff_extlink_src.h5 
+TOOLTEST h5diff_456.txt  --follow-symlinks -v --no-dangling-links  h5diff_extlink_src.h5 h5diff_extlink_src.h5
 
 # dangling link found for ext links (obj to obj). target file exist
-TOOLTEST h5diff_457.txt  --follow-symlinks -v --no-dangling-links  h5diff_extlink_src.h5 h5diff_extlink_src.h5 /ext_link_dset1 /ext_link_noexist1 
+TOOLTEST h5diff_457.txt  --follow-symlinks -v --no-dangling-links  h5diff_extlink_src.h5 h5diff_extlink_src.h5 /ext_link_dset1 /ext_link_noexist1
 
 # dangling link found for ext links (obj to obj). target file NOT exist
-TOOLTEST h5diff_458.txt  --follow-symlinks -v --no-dangling-links  h5diff_extlink_src.h5 h5diff_extlink_src.h5 /ext_link_dset1 /ext_link_noexist2  
+TOOLTEST h5diff_458.txt  --follow-symlinks -v --no-dangling-links  h5diff_extlink_src.h5 h5diff_extlink_src.h5 /ext_link_dset1 /ext_link_noexist2
 
 # dangling link found for ext links (obj to obj). Both dangle links
 TOOLTEST h5diff_459.txt  --follow-symlinks -v --no-dangling-links  h5diff_extlink_src.h5 h5diff_extlink_src.h5 /ext_link_noexist1 /ext_link_noexist2
@@ -993,14 +993,14 @@ TOOLTEST h5diff_466.txt -v --follow-symlinks h5diff_danglelinks1.h5 h5diff_dangl
 # soft link  vs. soft dangling
 TOOLTEST h5diff_467.txt -v --follow-symlinks h5diff_danglelinks1.h5 h5diff_danglelinks2.h5 /soft_link2
 # ext dangling vs. ext dangling
-TOOLTEST h5diff_468.txt -v --follow-symlinks h5diff_danglelinks1.h5 h5diff_danglelinks2.h5 /ext_link4 
+TOOLTEST h5diff_468.txt -v --follow-symlinks h5diff_danglelinks1.h5 h5diff_danglelinks2.h5 /ext_link4
 # ext link vs. ext dangling
 TOOLTEST h5diff_469.txt -v --follow-symlinks h5diff_danglelinks1.h5 h5diff_danglelinks2.h5 /ext_link2
 
 #----------------------------------------
-# dangling links without follow symlink 
+# dangling links without follow symlink
 # (HDFFV-7998)
-# test - soft dangle links (same and different paths), 
+# test - soft dangle links (same and different paths),
 #      - external dangle links (same and different paths)
 TOOLTEST h5diff_471.txt -v h5diff_danglelinks1.h5 h5diff_danglelinks2.h5
 TOOLTEST h5diff_472.txt -v h5diff_danglelinks1.h5 h5diff_danglelinks2.h5 /soft_link1
@@ -1011,7 +1011,7 @@ TOOLTEST h5diff_475.txt -v h5diff_danglelinks1.h5 h5diff_danglelinks2.h5 /ext_li
 # ##############################################################################
 # # test for group diff recursivly
 # ##############################################################################
-# root 
+# root
 TOOLTEST h5diff_500.txt -v h5diff_grp_recurse1.h5 h5diff_grp_recurse2.h5 / /
 TOOLTEST h5diff_501.txt -v --follow-symlinks h5diff_grp_recurse1.h5 h5diff_grp_recurse2.h5 / /
 
@@ -1045,7 +1045,7 @@ TOOLTEST h5diff_513.txt -v h5diff_grp_recurse1.h5 h5diff_grp_recurse2.h5 /slink_
 TOOLTEST h5diff_514.txt -v --follow-symlinks h5diff_grp_recurse1.h5 h5diff_grp_recurse2.h5 /slink_grp10 /slink_grp11
 
 ###############################################################################
-# Test for group recursive diff via multi-linked external links 
+# Test for group recursive diff via multi-linked external links
 # With follow-symlinks, file h5diff_grp_recurse_ext1.h5 and h5diff_grp_recurse_ext2-1.h5 should
 # be same with the external links.
 ###############################################################################
@@ -1068,7 +1068,7 @@ TOOLTEST h5diff_480.txt -v --exclude-path /group1/dset3 h5diff_exclude1-1.h5 h5d
 TOOLTEST h5diff_481.txt -v h5diff_exclude1-1.h5 h5diff_exclude1-2.h5
 
 #
-# Different structure, different names. 
+# Different structure, different names.
 #
 # Exclude all the different objects. Expect return - same
 TOOLTEST h5diff_482.txt -v --exclude-path "/group1" --exclude-path "/dset1" h5diff_exclude2-1.h5 h5diff_exclude2-2.h5
@@ -1099,9 +1099,9 @@ TOOLTEST h5diff_530.txt -v  h5diff_comp_vl_strs.h5 h5diff_comp_vl_strs.h5 /group
 TOOLTEST h5diff_540.txt -v compounds_array_vlen1.h5 compounds_array_vlen2.h5
 
 # ##############################################################################
-# # Test mutually exclusive options 
+# # Test mutually exclusive options
 # ##############################################################################
-# Test with -d , -p and --use-system-epsilon. 
+# Test with -d , -p and --use-system-epsilon.
 TOOLTEST h5diff_640.txt -v -d 5 -p 0.05 --use-system-epsilon h5diff_basic1.h5 h5diff_basic2.h5 /g1/dset3 /g1/dset4
 TOOLTEST h5diff_641.txt -v -d 5 -p 0.05 h5diff_basic1.h5 h5diff_basic2.h5 /g1/dset3 /g1/dset4
 TOOLTEST h5diff_642.txt -v -p 0.05 -d 5 h5diff_basic1.h5 h5diff_basic2.h5 /g1/dset3 /g1/dset4
diff --git a/tools/h5dump/CMakeLists.txt b/tools/h5dump/CMakeLists.txt
index 38cf12d..c81765c 100644
--- a/tools/h5dump/CMakeLists.txt
+++ b/tools/h5dump/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.1.0)
+cmake_minimum_required (VERSION 3.2.2)
 PROJECT (HDF5_TOOLS_H5DUMP)
 
 #-----------------------------------------------------------------------------
@@ -23,6 +23,35 @@ set_global_variable (HDF5_UTILS_TO_EXPORT "${HDF5_UTILS_TO_EXPORT};h5dump")
 set (H5_DEP_EXECUTABLES h5dump)
 
 if (BUILD_TESTING)
+
+  #-----------------------------------------------------------------------------
+  # If plugin library tests can be tested
+  #-----------------------------------------------------------------------------
+  set (HDF5_TOOL_PLUGIN_LIB_CORENAME         "dynlibdump")
+  set (HDF5_TOOL_PLUGIN_LIB_NAME             "${HDF5_EXTERNAL_LIB_PREFIX}${HDF5_TOOL_PLUGIN_LIB_CORENAME}")
+  set (HDF5_TOOL_PLUGIN_LIB_TARGET           ${HDF5_TOOL_PLUGIN_LIB_CORENAME})
+  add_definitions (${HDF_EXTRA_C_FLAGS})
+  INCLUDE_DIRECTORIES (${HDF5_SRC_DIR})
+
+  add_library (${HDF5_TOOL_PLUGIN_LIB_TARGET} SHARED dynlib_dump.c)
+  TARGET_C_PROPERTIES (${HDF5_TOOL_PLUGIN_LIB_TARGET} SHARED " " " ")
+  target_link_libraries (${HDF5_TOOL_PLUGIN_LIB_TARGET} ${HDF5_TEST_LIB_TARGET})
+  H5_SET_LIB_OPTIONS (${HDF5_TOOL_PLUGIN_LIB_TARGET} ${HDF5_TOOL_PLUGIN_LIB_NAME} SHARED ${HDF5_PACKAGE_SOVERSION})
+
+  # make plugins dir
+  file (MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/plugins")
+  #-----------------------------------------------------------------------------
+  # Copy plugin library to a plugins folder
+  #-----------------------------------------------------------------------------
+  add_custom_command (
+      TARGET     ${HDF5_TOOL_PLUGIN_LIB_TARGET}
+      POST_BUILD
+      COMMAND    ${CMAKE_COMMAND}
+      ARGS       -E copy_if_different
+          "$<TARGET_FILE:${HDF5_TOOL_PLUGIN_LIB_TARGET}>"
+          "${CMAKE_BINARY_DIR}/plugins/$<TARGET_FILE_NAME:${HDF5_TOOL_PLUGIN_LIB_TARGET}>"
+  )
+
   # --------------------------------------------------------------------
   # Add the h5dump test executable
   # --------------------------------------------------------------------
@@ -34,7 +63,7 @@ if (BUILD_TESTING)
     set_target_properties (h5dumpgentest PROPERTIES FOLDER generator/tools)
 
     #add_test (NAME h5dumpgentest COMMAND $<TARGET_FILE:h5dumpgentest>)
-  endif (HDF5_BUILD_GENERATORS)
+  endif ()
 
   include (CMakeTests.cmake)
 
diff --git a/tools/h5dump/CMakeTests.cmake b/tools/h5dump/CMakeTests.cmake
index d563e44..55635d4 100644
--- a/tools/h5dump/CMakeTests.cmake
+++ b/tools/h5dump/CMakeTests.cmake
@@ -165,6 +165,7 @@
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tstring2.ddl
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tstringe.ddl
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tszip.ddl
+      ${HDF5_TOOLS_SRC_DIR}/testfiles/tudfilter.ddl
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tudlink-1.ddl
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tudlink-2.ddl
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tuserfilter.ddl
@@ -281,6 +282,7 @@
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tstr.h5
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tstr2.h5
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tstr3.h5
+      ${HDF5_TOOLS_SRC_DIR}/testfiles/tudfilter.h5
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tudlink.h5
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tvldtypes1.h5
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tvldtypes2.h5
@@ -328,26 +330,26 @@
   foreach (tst_h5_file ${HDF5_REFERENCE_TEST_FILES})
     get_filename_component (fname "${tst_h5_file}" NAME)
     HDFTEST_COPY_FILE("${tst_h5_file}" "${PROJECT_BINARY_DIR}/testfiles/std/${fname}" "h5dump_std_files")
-  endforeach (tst_h5_file ${HDF5_REFERENCE_TEST_FILES})
+  endforeach ()
 
   foreach (tst_exp_file ${HDF5_REFERENCE_EXP_FILES})
     if (WIN32)
       file (READ ${HDF5_TOOLS_SRC_DIR}/testfiles/${tst_exp_file} TEST_STREAM)
       file (WRITE ${PROJECT_BINARY_DIR}/testfiles/std/${tst_exp_file} "${TEST_STREAM}")
-    else (WIN32)
+    else ()
       HDFTEST_COPY_FILE("${HDF5_TOOLS_SRC_DIR}/testfiles/${tst_exp_file}" "${PROJECT_BINARY_DIR}/testfiles/std/${tst_exp_file}" "h5dump_std_files")
-    endif (WIN32)
-  endforeach (tst_exp_file ${HDF5_REFERENCE_EXP_FILES})
+    endif ()
+  endforeach ()
 
   foreach (tst_other_file ${HDF5_REFERENCE_FILES})
     get_filename_component (fname "${tst_other_file}" NAME)
     HDFTEST_COPY_FILE("${tst_other_file}" "${PROJECT_BINARY_DIR}/testfiles/std/${fname}" "h5dump_std_files")
-  endforeach (tst_other_file ${HDF5_REFERENCE_FILES})
+  endforeach ()
 
   foreach (tst_error_file ${HDF5_ERROR_REFERENCE_TEST_FILES})
     get_filename_component (fname "${tst_error_file}" NAME)
     HDFTEST_COPY_FILE("${tst_error_file}" "${PROJECT_BINARY_DIR}/testfiles/std/${fname}" "h5dump_std_files")
-  endforeach (tst_error_file ${HDF5_ERROR_REFERENCE_TEST_FILES})
+  endforeach ()
 
   # --------------------------------------------------------------------
   # Special file handling
@@ -357,9 +359,9 @@
   if (WIN32)
     file (READ ${HDF5_TOOLS_SRC_DIR}/testfiles/tbinregR.exp TEST_STREAM)
     file (WRITE ${PROJECT_BINARY_DIR}/testfiles/std/tbinregR.exp "${TEST_STREAM}")
-  else (WIN32)
+  else ()
     HDFTEST_COPY_FILE("${HDF5_TOOLS_SRC_DIR}/testfiles/tbinregR.exp" "${PROJECT_BINARY_DIR}/testfiles/std/tbinregR.exp" "h5dump_std_files")
-  endif (WIN32)
+  endif ()
   add_custom_target(h5dump_std_files ALL COMMENT "Copying files needed by h5dump_std tests" DEPENDS ${h5dump_std_files_list})
 
 ##############################################################################
@@ -375,15 +377,9 @@
       set_tests_properties (H5DUMP-${testname} PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
       if (NOT "${last_test}" STREQUAL "")
         set_tests_properties (H5DUMP-${testname} PROPERTIES DEPENDS ${last_test})
-      endif (NOT "${last_test}" STREQUAL "")
+      endif ()
       set (last_test "H5DUMP-${testname}")
-    else (HDF5_ENABLE_USING_MEMCHECKER)
-      add_test (
-          NAME H5DUMP-h5dump-${testname}-clear-objects
-          COMMAND    ${CMAKE_COMMAND}
-              -E remove h5dump-${testname}.out h5dump-${testname}.out.err
-      )
-      set_tests_properties (H5DUMP-h5dump-${testname}-clear-objects PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
+    else ()
       add_test (
           NAME H5DUMP-h5dump-${testname}
           COMMAND "${CMAKE_COMMAND}"
@@ -395,9 +391,8 @@
               -D "TEST_REFERENCE=h5dump-${testname}.txt"
               -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
       )
-      set_tests_properties (H5DUMP-h5dump-${testname} PROPERTIES DEPENDS "H5DUMP-h5dump-${testname}-clear-objects")
-    endif (HDF5_ENABLE_USING_MEMCHECKER)
-  ENDMACRO (ADD_HELP_TEST)
+    endif ()
+  ENDMACRO ()
 
   MACRO (ADD_SKIP_H5_TEST skipresultfile skipresultcode testtype)
     if (${testtype} STREQUAL "SKIP")
@@ -406,11 +401,11 @@
             NAME H5DUMP-${skipresultfile}-SKIPPED
             COMMAND ${CMAKE_COMMAND} -E echo "SKIP ${skipresultfile} ${ARGN}"
         )
-      endif (NOT HDF5_ENABLE_USING_MEMCHECKER)
-    else (${testtype} STREQUAL "SKIP")
+      endif ()
+    else ()
       ADD_H5_TEST (${skipresultfile} ${skipresultcode} ${ARGN})
-    endif (${testtype} STREQUAL "SKIP")
-  ENDMACRO (ADD_SKIP_H5_TEST)
+    endif ()
+  ENDMACRO ()
 
   MACRO (ADD_H5_TEST resultfile resultcode)
     # If using memchecker add tests without using scripts
@@ -419,15 +414,15 @@
       set_tests_properties (H5DUMP-${resultfile} PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
       if (NOT ${resultcode} STREQUAL "0")
         set_tests_properties (H5DUMP-${resultfile} PROPERTIES WILL_FAIL "true")
-      endif (NOT ${resultcode} STREQUAL "0")
+      endif ()
       if (NOT "${last_test}" STREQUAL "")
         set_tests_properties (H5DUMP-${resultfile} PROPERTIES DEPENDS ${last_test})
-      endif (NOT "${last_test}" STREQUAL "")
-    else (HDF5_ENABLE_USING_MEMCHECKER)
+      endif ()
+    else ()
       add_test (
           NAME H5DUMP-${resultfile}-clear-objects
           COMMAND    ${CMAKE_COMMAND}
-              -E remove ${resultfile}.bin ${resultfile}.out ${resultfile}.out.err
+              -E remove ${resultfile}.bin
       )
       set_tests_properties (H5DUMP-${resultfile}-clear-objects PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
       add_test (
@@ -442,8 +437,8 @@
               -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
       )
       set_tests_properties (H5DUMP-${resultfile} PROPERTIES DEPENDS "H5DUMP-${resultfile}-clear-objects")
-    endif (HDF5_ENABLE_USING_MEMCHECKER)
-  ENDMACRO (ADD_H5_TEST file)
+    endif ()
+  ENDMACRO ()
 
   MACRO (ADD_H5_TEST_N resultfile resultcode)
     # If using memchecker add tests without using scripts
@@ -452,15 +447,15 @@
       set_tests_properties (H5DUMP-N-${resultfile} PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
       if (NOT ${resultcode} STREQUAL "0")
         set_tests_properties (H5DUMP-N-${resultfile} PROPERTIES WILL_FAIL "true")
-      endif (NOT ${resultcode} STREQUAL "0")
+      endif ()
       if (NOT "${last_test}" STREQUAL "")
         set_tests_properties (H5DUMP-N-${resultfile} PROPERTIES DEPENDS ${last_test})
-      endif (NOT "${last_test}" STREQUAL "")
-    else (HDF5_ENABLE_USING_MEMCHECKER)
+      endif ()
+    else ()
       add_test (
           NAME H5DUMP-N-${resultfile}-clear-objects
           COMMAND    ${CMAKE_COMMAND}
-              -E remove ${resultfile}-N.bin ${resultfile}-N.out ${resultfile}-N.out.err
+              -E remove ${resultfile}-N.bin
       )
       set_tests_properties (H5DUMP-N-${resultfile}-clear-objects PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
       add_test (
@@ -471,12 +466,12 @@
               -D "TEST_FOLDER=${PROJECT_BINARY_DIR}/testfiles/std"
               -D "TEST_OUTPUT=${resultfile}-N.out"
               -D "TEST_EXPECT=${resultcode}"
-              -D "TEST_REFERENCE=${resultfile}.ddl"
+              -D "TEST_REFERENCE=${resultfile}-N.ddl"
               -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
       )
       set_tests_properties (H5DUMP-N-${resultfile} PROPERTIES DEPENDS "H5DUMP-N-${resultfile}-clear-objects")
-    endif (HDF5_ENABLE_USING_MEMCHECKER)
-  ENDMACRO (ADD_H5_TEST_N file)
+    endif ()
+  ENDMACRO ()
 
   MACRO (ADD_H5_TEST_EXPORT resultfile targetfile resultcode)
     # If using memchecker add tests without using scripts
@@ -485,15 +480,15 @@
       set_tests_properties (H5DUMP-${resultfile} PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
       if (NOT ${resultcode} STREQUAL "0")
         set_tests_properties (H5DUMP-${resultfile} PROPERTIES WILL_FAIL "true")
-      endif (NOT ${resultcode} STREQUAL "0")
+      endif ()
       if (NOT "${last_test}" STREQUAL "")
         set_tests_properties (H5DUMP-${resultfile} PROPERTIES DEPENDS ${last_test})
-      endif (NOT "${last_test}" STREQUAL "")
-    else (HDF5_ENABLE_USING_MEMCHECKER)
+      endif ()
+    else ()
       add_test (
           NAME H5DUMP-${resultfile}-clear-objects
           COMMAND    ${CMAKE_COMMAND}
-              -E remove ${resultfile}.txt ${resultfile}.out ${resultfile}.out.err
+              -E remove ${resultfile}.txt
       )
       set_tests_properties (H5DUMP-${resultfile}-clear-objects PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
       add_test (
@@ -515,8 +510,8 @@
       )
       set_tests_properties (H5DUMP-${resultfile}-output-cmp PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
       set_tests_properties (H5DUMP-${resultfile}-output-cmp PROPERTIES DEPENDS H5DUMP-${resultfile})
-    endif (HDF5_ENABLE_USING_MEMCHECKER)
-  ENDMACRO (ADD_H5_TEST_EXPORT file)
+    endif ()
+  ENDMACRO ()
 
   MACRO (ADD_H5_TEST_EXPORT_DDL resultfile targetfile resultcode ddlfile)
     # If using memchecker add tests without using scripts
@@ -525,15 +520,15 @@
       set_tests_properties (H5DUMP-${resultfile} PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
       if (NOT ${resultcode} STREQUAL "0")
         set_tests_properties (H5DUMP-${resultfile} PROPERTIES WILL_FAIL "true")
-      endif (NOT ${resultcode} STREQUAL "0")
+      endif ()
       if (NOT "${last_test}" STREQUAL "")
         set_tests_properties (H5DUMP-${resultfile} PROPERTIES DEPENDS ${last_test})
-      endif (NOT "${last_test}" STREQUAL "")
-    else (HDF5_ENABLE_USING_MEMCHECKER)
+      endif ()
+    else ()
       add_test (
           NAME H5DUMP-${resultfile}-clear-objects
           COMMAND    ${CMAKE_COMMAND}
-              -E remove ${ddlfile}.txt ${resultfile}.txt ${resultfile}.out ${resultfile}.out.err
+              -E remove ${ddlfile}.txt ${resultfile}.txt
       )
       set_tests_properties (H5DUMP-${resultfile}-clear-objects PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
       add_test (
@@ -562,8 +557,8 @@
       )
       set_tests_properties (H5DUMP-${resultfile}-output-cmp-ddl PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
       set_tests_properties (H5DUMP-${resultfile}-output-cmp-ddl PROPERTIES DEPENDS H5DUMP-${resultfile}-output-cmp)
-    endif (HDF5_ENABLE_USING_MEMCHECKER)
-  ENDMACRO (ADD_H5_TEST_EXPORT_DDL file)
+    endif ()
+  ENDMACRO ()
 
   MACRO (ADD_H5_EXPORT_TEST resultfile targetfile resultcode)
     if (NOT HDF5_ENABLE_USING_MEMCHECKER)
@@ -586,18 +581,12 @@
       )
       set_tests_properties (H5DUMP-output-cmp-${resultfile} PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
       set_tests_properties (H5DUMP-output-cmp-${resultfile} PROPERTIES DEPENDS H5DUMP-output-${resultfile})
-    endif (NOT HDF5_ENABLE_USING_MEMCHECKER)
-  ENDMACRO (ADD_H5_EXPORT_TEST file)
+    endif ()
+  ENDMACRO ()
 
   MACRO (ADD_H5_MASK_TEST resultfile resultcode)
     if (NOT HDF5_ENABLE_USING_MEMCHECKER)
       add_test (
-          NAME H5DUMP-${resultfile}-clear-objects
-          COMMAND    ${CMAKE_COMMAND}
-              -E remove ${resultfile}.out ${resultfile}.out.err
-      )
-      set_tests_properties (H5DUMP-${resultfile}-clear-objects PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
-      add_test (
           NAME H5DUMP-${resultfile}
           COMMAND "${CMAKE_COMMAND}"
               -D "TEST_PROGRAM=$<TARGET_FILE:h5dump>"
@@ -609,19 +598,12 @@
               -D "TEST_MASK_ERROR=true"
               -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
       )
-      set_tests_properties (H5DUMP-${resultfile} PROPERTIES DEPENDS "H5DUMP-${resultfile}-clear-objects")
-    endif (NOT HDF5_ENABLE_USING_MEMCHECKER)
-  ENDMACRO (ADD_H5_MASK_TEST file)
+    endif ()
+  ENDMACRO ()
 
   MACRO (ADD_H5ERR_MASK_TEST resultfile resultcode)
     if (NOT HDF5_ENABLE_USING_MEMCHECKER)
       add_test (
-          NAME H5DUMP-${resultfile}-clear-objects
-          COMMAND    ${CMAKE_COMMAND}
-              -E remove ${resultfile}.out ${resultfile}.out.err
-      )
-      set_tests_properties (H5DUMP-${resultfile}-clear-objects PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
-      add_test (
           NAME H5DUMP-${resultfile}
           COMMAND "${CMAKE_COMMAND}"
               -D "TEST_PROGRAM=$<TARGET_FILE:h5dump>"
@@ -634,19 +616,12 @@
               -D "TEST_MASK_ERROR=true"
               -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
       )
-      set_tests_properties (H5DUMP-${resultfile} PROPERTIES DEPENDS "H5DUMP-${resultfile}-clear-objects")
-    endif (NOT HDF5_ENABLE_USING_MEMCHECKER)
-  ENDMACRO (ADD_H5ERR_MASK_TEST file)
+    endif ()
+  ENDMACRO ()
 
   MACRO (ADD_H5ERR_MASK_ENV_TEST resultfile resultcode envvar envval)
     if (NOT HDF5_ENABLE_USING_MEMCHECKER)
       add_test (
-          NAME H5DUMP-${resultfile}-clear-objects
-          COMMAND    ${CMAKE_COMMAND}
-              -E remove ${resultfile}.out ${resultfile}.out.err
-      )
-      set_tests_properties (H5DUMP-${resultfile}-clear-objects PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
-      add_test (
           NAME H5DUMP-${resultfile}
           COMMAND "${CMAKE_COMMAND}"
               -D "TEST_PROGRAM=$<TARGET_FILE:h5dump>"
@@ -661,9 +636,8 @@
               -D "TEST_ENV_VALUE:STRING=${envval}"
               -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
       )
-      set_tests_properties (H5DUMP-${resultfile} PROPERTIES DEPENDS "H5DUMP-${resultfile}-clear-objects")
-    endif (NOT HDF5_ENABLE_USING_MEMCHECKER)
-  ENDMACRO (ADD_H5ERR_MASK_ENV_TEST)
+    endif ()
+  ENDMACRO ()
 
   MACRO (ADD_H5_TEST_IMPORT conffile resultfile testfile resultcode)
     # If using memchecker add tests without using scripts
@@ -671,7 +645,7 @@
       add_test (
           NAME H5DUMP-IMPORT-${resultfile}-clear-objects
           COMMAND    ${CMAKE_COMMAND}
-              -E remove ${conffile}.out ${conffile}.out.err ${resultfile}.bin ${resultfile}.h5
+              -E remove ${resultfile}.bin ${resultfile}.h5
       )
       set_tests_properties (H5DUMP-IMPORT-${resultfile}-clear-objects PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
       add_test (
@@ -692,12 +666,39 @@
       add_test (NAME H5DUMP-IMPORT-h5diff-${resultfile} COMMAND h5diff ${testfile} ${resultfile}.h5 /integer /integer)
       set_tests_properties (H5DUMP-IMPORT-h5diff-${resultfile} PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
       set_tests_properties (H5DUMP-IMPORT-h5diff-${resultfile} PROPERTIES DEPENDS H5DUMP-IMPORT-h5import-${resultfile})
-    endif (NOT HDF5_ENABLE_USING_MEMCHECKER)
-  ENDMACRO (ADD_H5_TEST_IMPORT file)
+    endif ()
+  ENDMACRO ()
+
+  MACRO (ADD_H5_UD_TEST testname resultcode resultfile)
+    if (NOT HDF5_ENABLE_USING_MEMCHECKER)
+      # Remove any output file left over from previous test run
+      add_test (
+          NAME H5DUMP_UD-${testname}-clearall-objects
+          COMMAND    ${CMAKE_COMMAND}
+              -E remove
+              testfiles/std/${resultfile}.out
+              testfiles/std/${resultfile}.out.err
+      )
+      add_test (
+          NAME H5DUMP_UD-${testname}
+          COMMAND "${CMAKE_COMMAND}"
+              -D "TEST_PROGRAM=$<TARGET_FILE:h5dump>"
+              -D "TEST_ARGS:STRING=${ARGN}"
+              -D "TEST_FOLDER=${PROJECT_BINARY_DIR}/testfiles/std"
+              -D "TEST_OUTPUT=${resultfile}.out"
+              -D "TEST_EXPECT=${resultcode}"
+              -D "TEST_REFERENCE=${resultfile}.ddl"
+              -D "TEST_ENV_VAR=HDF5_PLUGIN_PATH"
+              -D "TEST_ENV_VALUE=${CMAKE_BINARY_DIR}/plugins"
+              -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
+      )
+      set_tests_properties (H5DUMP_UD-${testname} PROPERTIES DEPENDS H5DUMP_UD-${testname}-clearall-objects)
+    endif ()
+  ENDMACRO ()
 
 ##############################################################################
 ##############################################################################
-###           T H E   T E S T S                                          HDF5_ENABLE_USING_MEMCHECKER  ###
+###           T H E   T E S T S                                            ###
 ##############################################################################
 ##############################################################################
 
@@ -1051,9 +1052,9 @@
     set_tests_properties (H5DUMP-clearall-objects PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/std")
     if (NOT "${last_test}" STREQUAL "")
       set_tests_properties (H5DUMP-clearall-objects PROPERTIES DEPENDS ${last_test})
-    endif (NOT "${last_test}" STREQUAL "")
+    endif ()
     set (last_test "H5DUMP-clearall-objects")
-  endif (HDF5_ENABLE_USING_MEMCHECKER)
+  endif ()
 
   ADD_HELP_TEST(help 0 -h)
 
@@ -1110,10 +1111,10 @@
   ADD_H5_TEST_N (tattr-2 0 --enable-error-stack -N /\\\\/attr1 --any_path /attr4 --any_path=/attr5 tattr.h5)
   # test for header and error messages
   ADD_H5ERR_MASK_TEST (tattr-3 1 --enable-error-stack --header -a /attr2 --attribute=/attr tattr.h5)
-  # test for displaying attributes in shared datatype (also in group and dataset)
-  ADD_H5_TEST (tnamed_dtype_attr 0 --enable-error-stack tnamed_dtype_attr.h5)
   # test for displaying at least 9 attributes on root from a be machine
   ADD_H5_TEST (tattr-4_be 0 --enable-error-stack tattr4_be.h5)
+  # test for displaying attributes in shared datatype (also in group and dataset)
+  ADD_H5_TEST (tnamed_dtype_attr 0 --enable-error-stack tnamed_dtype_attr.h5)
 
   # test for displaying soft links and user-defined links
   ADD_H5_TEST (tslink-1 0 --enable-error-stack tslink.h5)
@@ -1333,11 +1334,11 @@
 # detect whether the encoder is present.
   if (H5_HAVE_FILTER_DEFLATE)
     set (USE_FILTER_DEFLATE "true")
-  endif (H5_HAVE_FILTER_DEFLATE)
+  endif ()
 
   if (H5_HAVE_FILTER_SZIP)
     set (USE_FILTER_SZIP "true")
-  endif (H5_HAVE_FILTER_SZIP)
+  endif ()
 
   if (USE_FILTER_DEFLATE)
     # data read internal filters
@@ -1345,8 +1346,8 @@
     if (HDF5_ENABLE_SZIP_SUPPORT)
       # data read all filters
       ADD_H5_TEST (treadfilter 0 --enable-error-stack -d all -d szip tfilters.h5)
-    endif (HDF5_ENABLE_SZIP_SUPPORT)
-  endif (USE_FILTER_DEFLATE)
+    endif ()
+  endif ()
 
   # test for displaying objects with very long names
   ADD_H5_TEST (tlonglinks 0 --enable-error-stack tlonglinks.h5)
@@ -1381,14 +1382,14 @@
 
   if (NOT HDF5_ENABLE_USING_MEMCHECKER)
     ADD_H5_TEST (tbin2 0 --enable-error-stack -b BE -d float -o tbin2.bin tbinary.h5)
-  endif (NOT HDF5_ENABLE_USING_MEMCHECKER)
+  endif ()
 
   # the NATIVE test can be validated with h5import/h5diff
   ADD_H5_TEST_IMPORT (tbin3 out3D tbinary.h5 0 --enable-error-stack -d integer -b NATIVE)
 
   if (NOT HDF5_ENABLE_USING_MEMCHECKER)
     ADD_H5_TEST (tbin4 0 --enable-error-stack -d double -b FILE -o tbin4.bin tbinary.h5)
-  endif (NOT HDF5_ENABLE_USING_MEMCHECKER)
+  endif ()
 
   # test for dataset region references
   ADD_H5_TEST (tdatareg 0 --enable-error-stack tdatareg.h5)
@@ -1433,3 +1434,8 @@
 
   # test for non-existing file
   ADD_H5_TEST (non_existing 1 --enable-error-stack tgroup.h5 non_existing.h5)
+
+##############################################################################
+###    P L U G I N  T E S T S
+##############################################################################
+ADD_H5_UD_TEST (h5dump_plugin_test 0 tudfilter --enable-error-stack tudfilter.h5)
diff --git a/tools/h5dump/CMakeTestsPBITS.cmake b/tools/h5dump/CMakeTestsPBITS.cmake
index 72f8dfb..e6265dc 100644
--- a/tools/h5dump/CMakeTestsPBITS.cmake
+++ b/tools/h5dump/CMakeTestsPBITS.cmake
@@ -88,18 +88,18 @@
   foreach (pbits_h5_file ${HDF5_REFERENCE_TEST_PBITS})
     get_filename_component(fname "${pbits_h5_file}" NAME)
     HDFTEST_COPY_FILE("${pbits_h5_file}" "${PROJECT_BINARY_DIR}/testfiles/pbits/${fname}" "h5dump_pbits_files")
-  endforeach (pbits_h5_file ${HDF5_REFERENCE_TEST_PBITS})
+  endforeach ()
 
 
   foreach (ddl_pbits ${HDF5_REFERENCE_PBITS})
     get_filename_component(fname "${ddl_pbits}" NAME)
     HDFTEST_COPY_FILE("${HDF5_TOOLS_SRC_DIR}/testfiles/pbits/${ddl_pbits}" "${PROJECT_BINARY_DIR}/testfiles/pbits/${fname}" "h5dump_pbits_files")
-  endforeach (ddl_pbits ${HDF5_REFERENCE_PBITS})
+  endforeach ()
 
   foreach (ddl_pbits ${HDF5_ERROR_REFERENCE_PBITS})
     get_filename_component(fname "${ddl_pbits}" NAME)
     HDFTEST_COPY_FILE("${PROJECT_SOURCE_DIR}/errfiles/${ddl_pbits}" "${PROJECT_BINARY_DIR}/testfiles/pbits/${fname}" "h5dump_pbits_files")
-  endforeach (ddl_pbits ${HDF5_ERROR_REFERENCE_PBITS})
+  endforeach ()
   add_custom_target(h5dump_pbits_files ALL COMMENT "Copying files needed by h5dump_pbits tests" DEPENDS ${h5dump_pbits_files_list})
 
 ##############################################################################
@@ -121,12 +121,6 @@
       endif ()
     else (HDF5_ENABLE_USING_MEMCHECKER)
       add_test (
-          NAME H5DUMP-${resultfile}-clear-objects
-          COMMAND    ${CMAKE_COMMAND}
-              -E remove ${resultfile}.out ${resultfile}.out.err
-      )
-      set_tests_properties (H5DUMP-${resultfile}-clear-objects PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/pbits")
-      add_test (
           NAME H5DUMP-${resultfile}
           COMMAND "${CMAKE_COMMAND}"
               -D "TEST_PROGRAM=$<TARGET_FILE:h5dump>"
@@ -137,9 +131,8 @@
               -D "TEST_REFERENCE=${resultfile}.ddl"
               -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
       )
-      set_tests_properties (H5DUMP-${resultfile} PROPERTIES DEPENDS "H5DUMP-${resultfile}-clear-objects")
-    endif (HDF5_ENABLE_USING_MEMCHECKER)
-  ENDMACRO (ADD_H5_PBITS_TEST file)
+    endif ()
+  ENDMACRO ()
 
 ##############################################################################
 ##############################################################################
@@ -263,9 +256,9 @@
     set_tests_properties (H5DUMP_PACKED_BITS-clearall-objects PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/pbits")
     if (NOT "${last_pbits_test}" STREQUAL "")
       set_tests_properties (H5DUMP_PACKED_BITS-clearall-objects PROPERTIES DEPENDS ${last_pbits_test})
-    endif (NOT "${last_pbits_test}" STREQUAL "")
+    endif ()
     set (last_pbits_test "H5DUMP_PACKED_BITS-clearall-objects")
-  endif (HDF5_ENABLE_USING_MEMCHECKER)
+  endif ()
 
   # test failure handling
   # Missing file name
diff --git a/tools/h5dump/CMakeTestsXML.cmake b/tools/h5dump/CMakeTestsXML.cmake
index 44d24df..6cdc81c 100644
--- a/tools/h5dump/CMakeTestsXML.cmake
+++ b/tools/h5dump/CMakeTestsXML.cmake
@@ -130,12 +130,12 @@
   foreach (tst_xml_h5_file ${HDF5_XML_REFERENCE_TEST_FILES})
     get_filename_component(fname "${tst_xml_h5_file}" NAME)
     HDFTEST_COPY_FILE("${tst_xml_h5_file}" "${PROJECT_BINARY_DIR}/testfiles/xml/${fname}" "h5dump_xml_files")
-  endforeach (tst_xml_h5_file ${HDF5_XML_REFERENCE_TEST_FILES})
+  endforeach ()
 
   foreach (tst_xml_other_file ${HDF5_XML_REFERENCE_FILES})
     get_filename_component(fname "${tst_xml_other_file}" NAME)
     HDFTEST_COPY_FILE("${tst_xml_other_file}" "${PROJECT_BINARY_DIR}/testfiles/xml/${fname}" "h5dump_xml_files")
-  endforeach (tst_xml_other_file ${HDF5_XML_REFERENCE_FILES})
+  endforeach ()
   add_custom_target(h5dump_xml_files ALL COMMENT "Copying files needed by h5dump_xml tests" DEPENDS ${h5dump_xml_files_list})
 
 ##############################################################################
@@ -151,11 +151,11 @@
             NAME H5DUMP-XML-${skipresultfile}-SKIPPED
             COMMAND ${CMAKE_COMMAND} -E echo "SKIP ${skipresultfile}.xml --xml ${ARGN}"
         )
-      endif (NOT HDF5_ENABLE_USING_MEMCHECKER)
-    else (${testtype} STREQUAL "SKIP")
+      endif ()
+    else ()
       ADD_XML_H5_TEST (${skipresultfile} ${skipresultcode} ${ARGN})
-    endif (${testtype} STREQUAL "SKIP")
-  ENDMACRO (ADD_XML_SKIP_H5_TEST)
+    endif ()
+  ENDMACRO ()
 
   MACRO (ADD_XML_H5_TEST resultfile resultcode)
     if (HDF5_ENABLE_USING_MEMCHECKER)
@@ -167,13 +167,7 @@
       if (NOT "${last_xml_test}" STREQUAL "")
         set_tests_properties (H5DUMP-XML-${resultfile} PROPERTIES DEPENDS ${last_xml_test})
       endif ()
-    else (HDF5_ENABLE_USING_MEMCHECKER)
-      add_test (
-          NAME H5DUMP-XML-${resultfile}-clear-objects
-          COMMAND    ${CMAKE_COMMAND}
-              -E remove ${resultfile}.out ${resultfile}.out.err
-      )
-      set_tests_properties (H5DUMP-XML-${resultfile}-clear-objects PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/xml")
+    else ()
       add_test (
           NAME H5DUMP-XML-${resultfile}
           COMMAND "${CMAKE_COMMAND}"
@@ -185,9 +179,8 @@
               -D "TEST_REFERENCE=${resultfile}.xml"
               -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
       )
-      set_tests_properties (H5DUMP-XML-${resultfile} PROPERTIES DEPENDS "H5DUMP-XML-${resultfile}-clear-objects")
-    endif (HDF5_ENABLE_USING_MEMCHECKER)
-  ENDMACRO (ADD_XML_H5_TEST file)
+    endif ()
+  ENDMACRO ()
 
 ##############################################################################
 ##############################################################################
@@ -333,9 +326,9 @@
     set_tests_properties (H5DUMP-XML-clearall-objects PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles/xml")
     if (NOT "${last_xml_test}" STREQUAL "")
       set_tests_properties (H5DUMP-XML-clearall-objects PROPERTIES DEPENDS ${last_xml_test})
-    endif (NOT "${last_xml_test}" STREQUAL "")
+    endif ()
     set (last_test "H5DUMP-XML-clearall-objects")
-  endif (HDF5_ENABLE_USING_MEMCHECKER)
+  endif ()
 
   ########## test XML
   ADD_XML_H5_TEST (tall.h5 0 tall.h5)
diff --git a/tools/h5dump/Makefile.am b/tools/h5dump/Makefile.am
index cee4801..6d95bb2 100644
--- a/tools/h5dump/Makefile.am
+++ b/tools/h5dump/Makefile.am
@@ -30,6 +30,11 @@ TEST_SCRIPT=testh5dump.sh testh5dumppbits.sh testh5dumpxml.sh
 check_PROGRAMS=$(TEST_PROG) binread
 check_SCRIPTS=$(TEST_SCRIPT)
 SCRIPT_DEPEND=h5dump$(EXEEXT)
+if HAVE_SHARED_CONDITIONAL
+if USE_PLUGINS_CONDITIONAL
+   TEST_SCRIPT += h5dump_plugin.sh
+endif
+endif
 
 # Our main target, the h5dump tool.
 bin_PROGRAMS=h5dump
@@ -43,6 +48,15 @@ LDADD=$(LIBH5TOOLS) $(LIBHDF5)
 # Source files for the program
 h5dump_SOURCES=h5dump.c h5dump_ddl.c h5dump_xml.c
 
+if HAVE_SHARED_CONDITIONAL
+  # Build it as shared library if configure is enabled for shared library.
+  lib_LTLIBRARIES=libdynlibdump.la
+  libdynlibdump_la_SOURCES=dynlib_dump.c
+
+install-exec-hook:
+	$(RM) $(DESTDIR)$(libdir)/*dynlib*
+endif
+
 # Temporary files.  *.h5 are generated by h5dumpgentest.  They should
 # copied to the testfiles/ directory if update is required.
 CHECK_CLEANFILES+=*.h5 *.bin
diff --git a/tools/h5dump/Makefile.in b/tools/h5dump/Makefile.in
index 83309aa..cc6b465 100644
--- a/tools/h5dump/Makefile.in
+++ b/tools/h5dump/Makefile.in
@@ -31,6 +31,7 @@
 # HDF5 Library Makefile(.in)
 #
 
+
 VPATH = @srcdir@
 am__is_gnu_make = { \
   if test -z '$(MAKELEVEL)'; then \
@@ -106,6 +107,7 @@ POST_UNINSTALL = :
 build_triplet = @build@
 host_triplet = @host@
 check_PROGRAMS = $(am__EXEEXT_1) binread$(EXEEXT)
+@HAVE_SHARED_CONDITIONAL_TRUE@@USE_PLUGINS_CONDITIONAL_TRUE@am__append_1 = h5dump_plugin.sh
 bin_PROGRAMS = h5dump$(EXEEXT)
 TESTS = $(am__EXEEXT_1) $(TEST_SCRIPT)
 subdir = tools/h5dump
@@ -117,19 +119,55 @@ am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
 DIST_COMMON = $(srcdir)/Makefile.am $(am__DIST_COMMON)
 mkinstalldirs = $(SHELL) $(top_srcdir)/bin/mkinstalldirs
 CONFIG_HEADER = $(top_builddir)/src/H5config.h
-CONFIG_CLEAN_FILES = testh5dump.sh testh5dumppbits.sh testh5dumpxml.sh
+CONFIG_CLEAN_FILES = h5dump_plugin.sh testh5dump.sh testh5dumppbits.sh \
+	testh5dumpxml.sh
 CONFIG_CLEAN_VPATH_FILES =
-am__installdirs = "$(DESTDIR)$(bindir)"
+am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`;
+am__vpath_adj = case $$p in \
+    $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \
+    *) f=$$p;; \
+  esac;
+am__strip_dir = f=`echo $$p | sed -e 's|^.*/||'`;
+am__install_max = 40
+am__nobase_strip_setup = \
+  srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*|]/\\\\&/g'`
+am__nobase_strip = \
+  for p in $$list; do echo "$$p"; done | sed -e "s|$$srcdirstrip/||"
+am__nobase_list = $(am__nobase_strip_setup); \
+  for p in $$list; do echo "$$p $$p"; done | \
+  sed "s| $$srcdirstrip/| |;"' / .*\//!s/ .*/ ./; s,\( .*\)/[^/]*$$,\1,' | \
+  $(AWK) 'BEGIN { files["."] = "" } { files[$$2] = files[$$2] " " $$1; \
+    if (++n[$$2] == $(am__install_max)) \
+      { print $$2, files[$$2]; n[$$2] = 0; files[$$2] = "" } } \
+    END { for (dir in files) print dir, files[dir] }'
+am__base_list = \
+  sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \
+  sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g'
+am__uninstall_files_from_dir = { \
+  test -z "$$files" \
+    || { test ! -d "$$dir" && test ! -f "$$dir" && test ! -r "$$dir"; } \
+    || { echo " ( cd '$$dir' && rm -f" $$files ")"; \
+         $(am__cd) "$$dir" && rm -f $$files; }; \
+  }
+am__installdirs = "$(DESTDIR)$(libdir)" "$(DESTDIR)$(bindir)"
+LTLIBRARIES = $(lib_LTLIBRARIES)
+libdynlibdump_la_LIBADD =
+am__libdynlibdump_la_SOURCES_DIST = dynlib_dump.c
+@HAVE_SHARED_CONDITIONAL_TRUE@am_libdynlibdump_la_OBJECTS =  \
+@HAVE_SHARED_CONDITIONAL_TRUE@	dynlib_dump.lo
+libdynlibdump_la_OBJECTS = $(am_libdynlibdump_la_OBJECTS)
+AM_V_lt = $(am__v_lt_@AM_V@)
+am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
+am__v_lt_0 = --silent
+am__v_lt_1 = 
+@HAVE_SHARED_CONDITIONAL_TRUE@am_libdynlibdump_la_rpath = -rpath \
+@HAVE_SHARED_CONDITIONAL_TRUE@	$(libdir)
 am__EXEEXT_1 = h5dumpgentest$(EXEEXT)
 PROGRAMS = $(bin_PROGRAMS)
 binread_SOURCES = binread.c
 binread_OBJECTS = binread.$(OBJEXT)
 binread_LDADD = $(LDADD)
 binread_DEPENDENCIES = $(LIBH5TOOLS) $(LIBHDF5)
-AM_V_lt = $(am__v_lt_@AM_V@)
-am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
-am__v_lt_0 = --silent
-am__v_lt_1 = 
 am_h5dump_OBJECTS = h5dump.$(OBJEXT) h5dump_ddl.$(OBJEXT) \
 	h5dump_xml.$(OBJEXT)
 h5dump_OBJECTS = $(am_h5dump_OBJECTS)
@@ -176,8 +214,10 @@ AM_V_CCLD = $(am__v_CCLD_@AM_V@)
 am__v_CCLD_ = $(am__v_CCLD_@AM_DEFAULT_V@)
 am__v_CCLD_0 = @echo "  CCLD    " $@;
 am__v_CCLD_1 = 
-SOURCES = binread.c $(h5dump_SOURCES) h5dumpgentest.c
-DIST_SOURCES = binread.c $(h5dump_SOURCES) h5dumpgentest.c
+SOURCES = $(libdynlibdump_la_SOURCES) binread.c $(h5dump_SOURCES) \
+	h5dumpgentest.c
+DIST_SOURCES = $(am__libdynlibdump_la_SOURCES_DIST) binread.c \
+	$(h5dump_SOURCES) h5dumpgentest.c
 am__can_run_installinfo = \
   case $$AM_UPDATE_INFO_DIR in \
     n|no|NO) false;; \
@@ -224,33 +264,6 @@ am__tty_colors = { \
     std=''; \
   fi; \
 }
-am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`;
-am__vpath_adj = case $$p in \
-    $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \
-    *) f=$$p;; \
-  esac;
-am__strip_dir = f=`echo $$p | sed -e 's|^.*/||'`;
-am__install_max = 40
-am__nobase_strip_setup = \
-  srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*|]/\\\\&/g'`
-am__nobase_strip = \
-  for p in $$list; do echo "$$p"; done | sed -e "s|$$srcdirstrip/||"
-am__nobase_list = $(am__nobase_strip_setup); \
-  for p in $$list; do echo "$$p $$p"; done | \
-  sed "s| $$srcdirstrip/| |;"' / .*\//!s/ .*/ ./; s,\( .*\)/[^/]*$$,\1,' | \
-  $(AWK) 'BEGIN { files["."] = "" } { files[$$2] = files[$$2] " " $$1; \
-    if (++n[$$2] == $(am__install_max)) \
-      { print $$2, files[$$2]; n[$$2] = 0; files[$$2] = "" } } \
-    END { for (dir in files) print dir, files[dir] }'
-am__base_list = \
-  sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \
-  sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g'
-am__uninstall_files_from_dir = { \
-  test -z "$$files" \
-    || { test ! -d "$$dir" && test ! -f "$$dir" && test ! -r "$$dir"; } \
-    || { echo " ( cd '$$dir' && rm -f" $$files ")"; \
-         $(am__cd) "$$dir" && rm -f $$files; }; \
-  }
 am__recheck_rx = ^[ 	]*:recheck:[ 	]*
 am__global_test_result_rx = ^[ 	]*:global-test-result:[ 	]*
 am__copy_in_global_log_rx = ^[ 	]*:copy-in-global-log:[ 	]*
@@ -404,10 +417,11 @@ am__test_logs2 = $(am__test_logs1:@EXEEXT@.log=.log)
 TEST_LOGS = $(am__test_logs2:.sh.log=.log)
 SH_LOG_DRIVER = $(SHELL) $(top_srcdir)/bin/test-driver
 SH_LOG_COMPILE = $(SH_LOG_COMPILER) $(AM_SH_LOG_FLAGS) $(SH_LOG_FLAGS)
-am__DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/testh5dump.sh.in \
-	$(srcdir)/testh5dumppbits.sh.in $(srcdir)/testh5dumpxml.sh.in \
-	$(top_srcdir)/bin/depcomp $(top_srcdir)/bin/mkinstalldirs \
-	$(top_srcdir)/bin/test-driver $(top_srcdir)/config/commence.am \
+am__DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/h5dump_plugin.sh.in \
+	$(srcdir)/testh5dump.sh.in $(srcdir)/testh5dumppbits.sh.in \
+	$(srcdir)/testh5dumpxml.sh.in $(top_srcdir)/bin/depcomp \
+	$(top_srcdir)/bin/mkinstalldirs $(top_srcdir)/bin/test-driver \
+	$(top_srcdir)/config/commence.am \
 	$(top_srcdir)/config/conclude.am
 DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = @ACLOCAL@
@@ -685,7 +699,8 @@ CHECK_CLEANFILES = *.chkexe *.chklog *.clog *.clog2 *.h5 *.bin
 
 # Test programs and scripts
 TEST_PROG = h5dumpgentest
-TEST_SCRIPT = testh5dump.sh testh5dumppbits.sh testh5dumpxml.sh
+TEST_SCRIPT = testh5dump.sh testh5dumppbits.sh testh5dumpxml.sh \
+	$(am__append_1)
 check_SCRIPTS = $(TEST_SCRIPT)
 SCRIPT_DEPEND = h5dump$(EXEEXT)
 
@@ -697,6 +712,8 @@ LDADD = $(LIBH5TOOLS) $(LIBHDF5)
 
 # Source files for the program
 h5dump_SOURCES = h5dump.c h5dump_ddl.c h5dump_xml.c
+@HAVE_SHARED_CONDITIONAL_TRUE@lib_LTLIBRARIES = libdynlibdump.la
+@HAVE_SHARED_CONDITIONAL_TRUE@libdynlibdump_la_SOURCES = dynlib_dump.c
 DISTCLEANFILES = testh5dump.sh testh5dumppbits.sh testh5dumpxml.sh
 
 # Automake needs to be taught how to build lib, progs, and tests targets.
@@ -752,12 +769,52 @@ $(top_srcdir)/configure: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
 $(ACLOCAL_M4): @MAINTAINER_MODE_TRUE@ $(am__aclocal_m4_deps)
 	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
 $(am__aclocal_m4_deps):
+h5dump_plugin.sh: $(top_builddir)/config.status $(srcdir)/h5dump_plugin.sh.in
+	cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@
 testh5dump.sh: $(top_builddir)/config.status $(srcdir)/testh5dump.sh.in
 	cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@
 testh5dumppbits.sh: $(top_builddir)/config.status $(srcdir)/testh5dumppbits.sh.in
 	cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@
 testh5dumpxml.sh: $(top_builddir)/config.status $(srcdir)/testh5dumpxml.sh.in
 	cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@
+
+install-libLTLIBRARIES: $(lib_LTLIBRARIES)
+	@$(NORMAL_INSTALL)
+	@list='$(lib_LTLIBRARIES)'; test -n "$(libdir)" || list=; \
+	list2=; for p in $$list; do \
+	  if test -f $$p; then \
+	    list2="$$list2 $$p"; \
+	  else :; fi; \
+	done; \
+	test -z "$$list2" || { \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(libdir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(libdir)" || exit 1; \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 '$(DESTDIR)$(libdir)'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 "$(DESTDIR)$(libdir)"; \
+	}
+
+uninstall-libLTLIBRARIES:
+	@$(NORMAL_UNINSTALL)
+	@list='$(lib_LTLIBRARIES)'; test -n "$(libdir)" || list=; \
+	for p in $$list; do \
+	  $(am__strip_dir) \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f '$(DESTDIR)$(libdir)/$$f'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f "$(DESTDIR)$(libdir)/$$f"; \
+	done
+
+clean-libLTLIBRARIES:
+	-test -z "$(lib_LTLIBRARIES)" || rm -f $(lib_LTLIBRARIES)
+	@list='$(lib_LTLIBRARIES)'; \
+	locs=`for p in $$list; do echo $$p; done | \
+	      sed 's|^[^/]*$$|.|; s|/[^/]*$$||; s|$$|/so_locations|' | \
+	      sort -u`; \
+	test -z "$$locs" || { \
+	  echo rm -f $${locs}; \
+	  rm -f $${locs}; \
+	}
+
+libdynlibdump.la: $(libdynlibdump_la_OBJECTS) $(libdynlibdump_la_DEPENDENCIES) $(EXTRA_libdynlibdump_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(LINK) $(am_libdynlibdump_la_rpath) $(libdynlibdump_la_OBJECTS) $(libdynlibdump_la_LIBADD) $(LIBS)
 install-binPROGRAMS: $(bin_PROGRAMS)
 	@$(NORMAL_INSTALL)
 	@list='$(bin_PROGRAMS)'; test -n "$(bindir)" || list=; \
@@ -836,6 +893,7 @@ distclean-compile:
 	-rm -f *.tab.c
 
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/binread.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dynlib_dump.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/h5dump.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/h5dump_ddl.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/h5dump_xml.Po@am__quote@
@@ -1106,9 +1164,11 @@ check-am: all-am
 	$(MAKE) $(AM_MAKEFLAGS) $(check_PROGRAMS) $(check_SCRIPTS)
 	$(MAKE) $(AM_MAKEFLAGS) check-TESTS
 check: check-am
-all-am: Makefile $(PROGRAMS) all-local
+all-am: Makefile $(LTLIBRARIES) $(PROGRAMS) all-local
+install-binPROGRAMS: install-libLTLIBRARIES
+
 installdirs:
-	for dir in "$(DESTDIR)$(bindir)"; do \
+	for dir in "$(DESTDIR)$(libdir)" "$(DESTDIR)$(bindir)"; do \
 	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
 	done
 install: install-am
@@ -1145,10 +1205,11 @@ distclean-generic:
 maintainer-clean-generic:
 	@echo "This command is intended for maintainers to use"
 	@echo "it deletes files that may require special tools to rebuild."
+@HAVE_SHARED_CONDITIONAL_FALSE@install-exec-hook:
 clean: clean-am
 
 clean-am: clean-binPROGRAMS clean-checkPROGRAMS clean-generic \
-	clean-libtool mostlyclean-am
+	clean-libLTLIBRARIES clean-libtool mostlyclean-am
 
 distclean: distclean-am
 	-rm -rf ./$(DEPDIR)
@@ -1174,8 +1235,9 @@ install-dvi: install-dvi-am
 
 install-dvi-am:
 
-install-exec-am: install-binPROGRAMS
-
+install-exec-am: install-binPROGRAMS install-libLTLIBRARIES
+	@$(NORMAL_INSTALL)
+	$(MAKE) $(AM_MAKEFLAGS) install-exec-hook
 install-html: install-html-am
 
 install-html-am:
@@ -1214,25 +1276,26 @@ ps: ps-am
 
 ps-am:
 
-uninstall-am: uninstall-binPROGRAMS
+uninstall-am: uninstall-binPROGRAMS uninstall-libLTLIBRARIES
 
-.MAKE: check-am install-am install-strip
+.MAKE: check-am install-am install-exec-am install-strip
 
 .PHONY: CTAGS GTAGS TAGS all all-am all-local check check-TESTS \
 	check-am clean clean-binPROGRAMS clean-checkPROGRAMS \
-	clean-generic clean-libtool cscopelist-am ctags ctags-am \
-	distclean distclean-compile distclean-generic \
+	clean-generic clean-libLTLIBRARIES clean-libtool cscopelist-am \
+	ctags ctags-am distclean distclean-compile distclean-generic \
 	distclean-libtool distclean-tags distdir dvi dvi-am html \
 	html-am info info-am install install-am install-binPROGRAMS \
 	install-data install-data-am install-dvi install-dvi-am \
-	install-exec install-exec-am install-html install-html-am \
-	install-info install-info-am install-man install-pdf \
-	install-pdf-am install-ps install-ps-am install-strip \
-	installcheck installcheck-am installdirs maintainer-clean \
+	install-exec install-exec-am install-exec-hook install-html \
+	install-html-am install-info install-info-am \
+	install-libLTLIBRARIES install-man install-pdf install-pdf-am \
+	install-ps install-ps-am install-strip installcheck \
+	installcheck-am installdirs maintainer-clean \
 	maintainer-clean-generic mostlyclean mostlyclean-compile \
 	mostlyclean-generic mostlyclean-libtool mostlyclean-local pdf \
 	pdf-am ps ps-am recheck tags tags-am uninstall uninstall-am \
-	uninstall-binPROGRAMS
+	uninstall-binPROGRAMS uninstall-libLTLIBRARIES
 
 .PRECIOUS: Makefile
 
@@ -1248,6 +1311,11 @@ uninstall-am: uninstall-binPROGRAMS
 help:
 	@$(top_srcdir)/bin/makehelp
 
+@HAVE_SHARED_CONDITIONAL_TRUE@  # Build it as shared library if configure is enabled for shared library.
+
+@HAVE_SHARED_CONDITIONAL_TRUE@install-exec-hook:
+@HAVE_SHARED_CONDITIONAL_TRUE@	$(RM) $(DESTDIR)$(libdir)/*dynlib*
+
 # lib/progs/tests targets recurse into subdirectories. build-* targets
 # build files in this directory.
 build-lib: $(LIB)
diff --git a/tools/h5dump/dynlib_dump.c b/tools/h5dump/dynlib_dump.c
new file mode 100644
index 0000000..0d8be2b
--- /dev/null
+++ b/tools/h5dump/dynlib_dump.c
@@ -0,0 +1,94 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5. The full HDF5 copyright notice, including      *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic document set and is     *
+ * linked from the top-level documents page.  It can also be found at        *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have access   *
+ * to either file, you may request a copy from help@hdfgroup.org.            *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+/*
+ * Programmer:	Raymond Lu
+ *		13 February 2013
+ *
+ * Purpose:	Tests the plugin module (H5PL)
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include "H5PLextern.h"
+
+#define H5Z_FILTER_DYNLIB2      258 
+#define MULTIPLIER              3
+
+static size_t H5Z_filter_dynlib2(unsigned int flags, size_t cd_nelmts,
+                const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf);
+
+/* This message derives from H5Z */
+const H5Z_class2_t H5Z_DYNLIB2[1] = {{
+    H5Z_CLASS_T_VERS,                /* H5Z_class_t version             */
+    H5Z_FILTER_DYNLIB2,		     /* Filter id number		*/
+    1, 1,                            /* Encoding and decoding enabled   */
+    "dynlib2",			     /* Filter name for debugging	*/
+    NULL,                            /* The "can apply" callback        */
+    NULL,                            /* The "set local" callback        */
+    (H5Z_func_t)H5Z_filter_dynlib2,    /* The actual filter function	*/
+}};
+
+H5PL_type_t   H5PLget_plugin_type(void) {return H5PL_TYPE_FILTER;}
+const void   *H5PLget_plugin_info(void) {return H5Z_DYNLIB2;}
+
+/*-------------------------------------------------------------------------
+ * Function:	H5Z_filter_dynlib2
+ *
+ * Purpose:	A dynlib2 filter method that multiplies the original value 
+ *              during write and divide the original value during read. It
+ *              will be built as a shared library.  plugin.c test will load 
+ *              and use this filter library.    
+ *
+ * Return:	Success:	Data chunk size
+ *
+ *		Failure:	0
+ *
+ * Programmer:	Raymond Lu
+ *              29 March 2013
+ *
+ *-------------------------------------------------------------------------
+ */
+static size_t
+H5Z_filter_dynlib2(unsigned int flags, size_t cd_nelmts,
+      const unsigned int *cd_values, size_t nbytes,
+      size_t *buf_size, void **buf)
+{
+    int *int_ptr = (int *)*buf;          /* Pointer to the data values */
+    size_t buf_left = *buf_size;  /* Amount of data buffer left to process */
+
+    /* Check for the correct number of parameters */
+    if(cd_nelmts > 0)
+        return(0);
+
+    /* Assignment to eliminate unused parameter warning. */
+    cd_values = cd_values;
+
+    if(flags & H5Z_FLAG_REVERSE) { /*read*/
+        /* Divide the original value with MULTIPLIER */
+        while(buf_left > 0) {
+            *int_ptr++ /= MULTIPLIER;
+            buf_left -= sizeof(int);
+        } /* end while */
+    } /* end if */
+    else { /*write*/
+        /* Multiply the original value with MULTIPLIER */
+        while(buf_left > 0) {
+            *int_ptr++ *= MULTIPLIER;
+            buf_left -= sizeof(int);
+        } /* end while */
+    } /* end else */
+
+    return nbytes;
+} /* end H5Z_filter_dynlib2() */
+
diff --git a/tools/h5dump/h5dump_plugin.sh.in b/tools/h5dump/h5dump_plugin.sh.in
new file mode 100644
index 0000000..d3274da
--- /dev/null
+++ b/tools/h5dump/h5dump_plugin.sh.in
@@ -0,0 +1,226 @@
+#! /bin/sh
+#
+# Copyright by The HDF Group.
+# All rights reserved.
+#
+# This file is part of HDF5. The full HDF5 copyright notice, including
+# terms governing use, modification, and redistribution, is contained in
+# the files COPYING and Copyright.html.  COPYING can be found at the root
+# of the source code distribution tree; Copyright.html can be found at the
+# root level of an installed copy of the electronic document set and is
+# linked from the top-level documents page.  It can also be found at
+# http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have access
+# to either file, you may request a copy from help@hdfgroup.org.
+#
+srcdir=@srcdir@
+TOP_BUILDDIR=@top_builddir@
+
+# Determine backward compatibility options enabled
+DEPRECATED_SYMBOLS="@DEPRECATED_SYMBOLS@"
+
+EXIT_SUCCESS=0
+EXIT_FAILURE=1
+
+DUMPER=h5dump                     # The tool name
+DUMPER_BIN=`pwd`/$DUMPER          # The path of the tool binary
+
+nerrors=0
+verbose=yes
+h5haveexitcode=yes      # default is yes
+
+TEST_NAME=h5dump_ud_plugin
+FROM_DIR=`pwd`/.libs
+PLUGIN_LIB="$FROM_DIR/libdynlibdump.*"
+PLUGIN_LIBDIR=testdir3
+
+RM='rm -rf'
+GREP='grep'
+CMP='cmp'
+DIFF='diff -c'
+CP='cp'
+DIRNAME='dirname'
+LS='ls'
+AWK='awk'
+
+# source dirs
+SRC_TOOLS="$srcdir/../"
+
+# testfiles source dirs for tools
+SRC_TOOLS_TESTFILES="$SRC_TOOLS/testfiles"
+SRC_H5DUMP_TESTFILES="$SRC_TOOLS_TESTFILES"
+
+TESTDIR=./testplug
+test -d $TESTDIR || mkdir $TESTDIR
+
+######################################################################
+# test files
+# --------------------------------------------------------------------
+# All the test files copy from source directory to test directory
+# NOTE: Keep this framework to add/remove test files.
+#       Any test files from other tools can be used in this framework.
+#       This list are also used for checking exist.
+#       Comment '#' without space can be used.
+# --------------------------------------------------------------------
+LIST_HDF5_TEST_FILES="
+$SRC_H5DUMP_TESTFILES/tudfilter.h5
+$SRC_H5DUMP_TESTFILES/tudfilter.ddl
+"
+
+# RUNSERIAL is used. Check if it can return exit code from executable correctly.
+if [ -n "$RUNSERIAL_NOEXITCODE" ]; then
+    echo "***Warning*** Serial Exit Code is not passed back to shell correctly."
+    echo "***Warning*** Exit code checking is skipped."
+    h5haveexitcode=no
+fi
+
+# Main Body
+# Create test directories if not exists yet.
+test -d $PLUGIN_LIBDIR || mkdir -p $PLUGIN_LIBDIR
+if [ $? != 0 ]; then
+    echo "Failed to create test directory($PLUGIN_LIBDIR)"
+    exit $EXIT_FAILURE
+fi
+
+# copy plugin library for test
+$CP $PLUGIN_LIB $PLUGIN_LIBDIR
+if [ $? != 0 ]; then
+    echo "Failed to copy plugin library ($PLUGIN_LIB) for test."
+    exit $EXIT_FAILURE
+fi
+
+# setup plugin path
+ENVCMD="env HDF5_PLUGIN_PATH=../${PLUGIN_LIBDIR}"
+
+#
+# copy test files and expected output files from source dirs to test dir
+#
+COPY_TESTFILES="$LIST_HDF5_TEST_FILES"
+
+COPY_TESTFILES_TO_TESTDIR()
+{
+    # copy test files. Used -f to make sure get a new copy
+    for tstfile in $COPY_TESTFILES
+    do
+        # ignore '#' comment
+        echo $tstfile | tr -d ' ' | grep '^#' > /dev/null
+        RET=$?
+        if [ $RET -eq 1 ]; then
+            # skip cp if srcdir is same as destdir
+            # this occurs when build/test performed in source dir and
+            # make cp fail
+            SDIR=`$DIRNAME $tstfile`
+            INODE_SDIR=`$LS -i -d $SDIR | $AWK -F' ' '{print $1}'`
+            INODE_DDIR=`$LS -i -d $TESTDIR | $AWK -F' ' '{print $1}'`
+            if [ "$INODE_SDIR" != "$INODE_DDIR" ]; then
+                $CP -f $tstfile $TESTDIR
+                if [ $? -ne 0 ]; then
+                    echo "Error: FAILED to copy $tstfile ."
+
+                    # Comment out this to CREATE expected file
+                    exit $EXIT_FAILURE
+                fi
+            fi
+        fi
+    done
+}
+
+CLEAN_TESTFILES_AND_TESTDIR()
+{
+    # skip rm if srcdir is same as destdir
+    # this occurs when build/test performed in source dir and
+    # make cp fail
+    SDIR=$SRC_H5DUMP_TESTFILES
+    INODE_SDIR=`$LS -i -d $SDIR | $AWK -F' ' '{print $1}'`
+    INODE_DDIR=`$LS -i -d $TESTDIR | $AWK -F' ' '{print $1}'`
+    if [ "$INODE_SDIR" != "$INODE_DDIR" ]; then
+        $RM $TESTDIR
+    fi
+}
+
+# Print a line-line message left justified in a field of 70 characters
+# beginning with the word "Testing".
+#
+TESTING() {
+   SPACES="                                                               "
+   echo "Testing $* $SPACES" | cut -c1-70 | tr -d '\012'
+}
+
+# Source in the output filter function definitions.
+. $srcdir/../../bin/output_filter.sh
+
+# Run a test and print PASS or *FAIL*.  If a test fails then increment
+# the `nerrors' global variable and (if $verbose is set) display the
+# difference between the actual output and the expected output. The
+# expected output is given as the first argument to this function and
+# the actual output file is calculated by replacing the `.ddl' with
+# `.out'.  The actual output is not removed if $HDF5_NOCLEANUP has a
+# non-zero value.
+# If $1 == ignorecase then do caseless CMP and DIFF.
+# ADD_H5_TEST
+TOOLTEST() {
+    expect="$TESTDIR/$1"
+    actual="$TESTDIR/`basename $1 .ddl`.out"
+    actual_err="$TESTDIR/`basename $1 .ddl`.err"
+    actual_sav=${actual}-sav
+    actual_err_sav=${actual_err}-sav
+    shift
+
+    # Run test.
+    TESTING $DUMPER $@
+    (
+    cd $TESTDIR
+      $ENVCMD $RUNSERIAL $DUMPER_BIN "$@"
+    ) >$actual 2>$actual_err
+
+    # save actual and actual_err in case they are needed later.
+    cp $actual $actual_sav
+    STDOUT_FILTER $actual
+    cp $actual_err $actual_err_sav
+    STDERR_FILTER $actual_err
+    cat $actual_err >> $actual
+
+  if [ ! -f $expect ]; then
+    # Create the expect file if it doesn't yet exist.
+     echo " CREATED"
+     cp $actual $expect
+    elif $CMP $expect $actual > /dev/null 2>&1 ; then
+     echo " PASSED"
+    else
+     echo "*FAILED*"
+     echo "    Expected result (*.ddl) differs from actual result (*.out)"
+     nerrors="`expr $nerrors + 1`"
+     test yes = "$verbose" && $DIFF $caseless $expect $actual |sed 's/^/    /'
+    fi
+
+    # Clean up output file
+    if test -z "$HDF5_NOCLEANUP"; then
+     rm -f $actual $actual_err $actual_sav $actual_err_sav $actual_ext
+    fi
+
+}
+
+##############################################################################
+###           T H E   T E S T S
+##############################################################################
+# prepare for test
+COPY_TESTFILES_TO_TESTDIR
+
+# Run the test
+TOOLTEST tudfilter.ddl --enable-error-stack tudfilter.h5
+
+# print results
+if test $nerrors -ne 0 ; then
+    echo "$nerrors errors encountered"
+    exit_code=$EXIT_FAILURE
+else
+    echo "All Plugin API tests passed."
+    exit_code=$EXIT_SUCCESS
+fi
+
+# Clean up temporary files/directories
+CLEAN_TESTFILES_AND_TESTDIR
+
+# Clean up temporary files/directories and leave
+$RM $PLUGIN_LIBDIR
+
+exit $exit_code
diff --git a/tools/h5dump/h5dumpgentest.c b/tools/h5dump/h5dumpgentest.c
index 058ea90..284e42b 100644
--- a/tools/h5dump/h5dumpgentest.c
+++ b/tools/h5dump/h5dumpgentest.c
@@ -113,6 +113,7 @@
 #define FILE81  "tints4dims.h5"
 #define FILE82  "tcompound_complex2.h5"
 #define FILE83  "tvlenstr_array.h5"
+#define FILE84  "tudfilter.h5"
 
 /*-------------------------------------------------------------------------
  * prototypes
@@ -152,6 +153,23 @@ const H5Z_class2_t H5Z_MYFILTER[1] = {{
         myfilter,            /* The actual filter function */
 }};
 
+#define H5Z_FILTER_DYNLIB2      258
+#define MULTIPLIER              3
+
+static size_t H5Z_filter_dynlib2(unsigned int flags, size_t cd_nelmts,
+                const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf);
+
+/* This message derives from H5Z */
+const H5Z_class2_t H5Z_DYNLIB2[1] = {{
+    H5Z_CLASS_T_VERS,                /* H5Z_class_t version             */
+    H5Z_FILTER_DYNLIB2,             /* Filter id number        */
+    1, 1,                            /* Encoding and decoding enabled   */
+    "dynlib2",                 /* Filter name for debugging    */
+    NULL,                            /* The "can apply" callback        */
+    NULL,                            /* The "set local" callback        */
+    (H5Z_func_t)H5Z_filter_dynlib2,    /* The actual filter function    */
+}};
+
 
 /* A UD link traversal function.  Shouldn't actually be called. */
 static hid_t UD_traverse(H5_ATTR_UNUSED const char * link_name, H5_ATTR_UNUSED hid_t cur_group,
@@ -618,7 +636,7 @@ static int gent_softlink2(void)
     fileid1 = H5Fcreate(FILE4_1, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
     if (fileid1 < 0)
     {
-        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Fcreate failed.\n", FILE4_1);
         status = FAIL;
         goto out;
     }
@@ -629,7 +647,7 @@ static int gent_softlink2(void)
     gid1 = H5Gcreate2(fileid1, "group1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
     if (gid1 < 0)
     {
-        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", FILE4_1);
         status = FAIL;
         goto out;
     }
@@ -637,7 +655,7 @@ static int gent_softlink2(void)
     gid2 = H5Gcreate2(fileid1, "group_empty", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
     if (gid2 < 0)
     {
-        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", FILE4_1);
         status = FAIL;
         goto out;
     }
@@ -649,7 +667,7 @@ static int gent_softlink2(void)
     status = H5Tcommit2(fileid1, "dtype", datatype, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
     if (status < 0)
     {
-        fprintf(stderr, "Error: %s> H5Tcommit2 failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Tcommit2 failed.\n", FILE4_1);
         status = FAIL;
         goto out;
     }
@@ -677,7 +695,7 @@ static int gent_softlink2(void)
             H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
     if (dset1 < 0)
     {
-        fprintf(stderr, "Error: %s> H5Dcreate2 failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Dcreate2 failed.\n", FILE4_1);
         status = FAIL;
         goto out;
     }
@@ -685,7 +703,7 @@ static int gent_softlink2(void)
     status = H5Dwrite(dset1, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, data1);
     if (status < 0)
     {
-        fprintf(stderr, "Error: %s> H5Dwrite failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Dwrite failed.\n", FILE4_1);
         status = FAIL;
         goto out;
     }
@@ -698,7 +716,7 @@ static int gent_softlink2(void)
             H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
     if (dset2 < 0)
     {
-        fprintf(stderr, "Error: %s> H5Dcreate2 failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Dcreate2 failed.\n", FILE4_1);
         status = FAIL;
         goto out;
     }
@@ -706,7 +724,7 @@ static int gent_softlink2(void)
     status = H5Dwrite(dset2, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, data2);
     if (status < 0)
     {
-        fprintf(stderr, "Error: %s> H5Dwrite failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Dwrite failed.\n", FILE4_1);
         status = FAIL;
         goto out;
     }
@@ -721,7 +739,7 @@ static int gent_softlink2(void)
     status = H5Lcreate_soft("/dset1", fileid1, "soft_dset1", H5P_DEFAULT, H5P_DEFAULT);
     if (status < 0)
     {
-        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
         status = FAIL;
         goto out;
     }
@@ -730,7 +748,7 @@ static int gent_softlink2(void)
     status = H5Lcreate_soft("/dtype", fileid1, "soft_dtype", H5P_DEFAULT, H5P_DEFAULT);
     if (status < 0)
     {
-        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
         status = FAIL;
         goto out;
     }
@@ -739,7 +757,7 @@ static int gent_softlink2(void)
     status = H5Lcreate_soft("/group1", fileid1, "soft_group1", H5P_DEFAULT, H5P_DEFAULT);
     if (status < 0)
     {
-        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
         status = FAIL;
         goto out;
     }
@@ -748,7 +766,7 @@ static int gent_softlink2(void)
     status = H5Lcreate_soft("/group_empty", fileid1, "soft_empty_grp", H5P_DEFAULT, H5P_DEFAULT);
     if (status < 0)
     {
-        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
         status = FAIL;
         goto out;
     }
@@ -757,7 +775,7 @@ static int gent_softlink2(void)
     status = H5Lcreate_soft("not_yet", fileid1, "soft_dangle", H5P_DEFAULT, H5P_DEFAULT);
     if (status < 0)
     {
-        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
         status = FAIL;
         goto out;
     }
@@ -769,7 +787,7 @@ static int gent_softlink2(void)
     status = H5Lcreate_soft("/dset1", gid1, "soft_dset1", H5P_DEFAULT, H5P_DEFAULT);
     if (status < 0)
     {
-        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
         status = FAIL;
         goto out;
     }
@@ -778,7 +796,7 @@ static int gent_softlink2(void)
     status = H5Lcreate_soft("/dset2", gid1, "soft_dset2", H5P_DEFAULT, H5P_DEFAULT);
     if (status < 0)
     {
-        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
         status = FAIL;
         goto out;
     }
@@ -787,7 +805,7 @@ static int gent_softlink2(void)
     status = H5Lcreate_soft("/dtype", gid1, "soft_dtype", H5P_DEFAULT, H5P_DEFAULT);
     if (status < 0)
     {
-        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
         status = FAIL;
         goto out;
     }
@@ -796,7 +814,7 @@ static int gent_softlink2(void)
     status = H5Lcreate_soft("/group_empty", gid1, "soft_empty_grp", H5P_DEFAULT, H5P_DEFAULT);
     if (status < 0)
     {
-        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
         status = FAIL;
         goto out;
     }
@@ -805,7 +823,7 @@ static int gent_softlink2(void)
     status = H5Lcreate_soft("not_yet", gid1, "soft_dangle", H5P_DEFAULT, H5P_DEFAULT);
     if (status < 0)
     {
-        fprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Lcreate_soft failed.\n", FILE4_1);
         status = FAIL;
         goto out;
     }
@@ -815,31 +833,31 @@ static int gent_softlink2(void)
      * Close/release resources.
      */
     if(dataspace >= 0 && H5Sclose(dataspace) < 0) {
-        fprintf(stderr, "Error: %s> H5Sclose failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Sclose failed.\n", FILE4_1);
         status = FAIL;
     }
     if(gid1 >= 0 && H5Gclose(gid1) < 0) {
-        fprintf(stderr, "Error: %s> H5Gclose failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Gclose failed.\n", FILE4_1);
         status = FAIL;
     }
     if(gid2 >= 0 && H5Gclose(gid2) < 0) {
-        fprintf(stderr, "Error: %s> H5Gclose failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Gclose failed.\n", FILE4_1);
         status = FAIL;
     }
     if(datatype >= 0 && H5Tclose(datatype) < 0) {
-        fprintf(stderr, "Error: %s> H5Tclose failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Tclose failed.\n", FILE4_1);
         status = FAIL;
     }
     if(dset1 >= 0 && H5Dclose(dset1) < 0) {
-        fprintf(stderr, "Error: %s> H5Dclose failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Dclose failed.\n", FILE4_1);
         status = FAIL;
     }
     if(dset2 >= 0 && H5Dclose(dset2) < 0) {
-        fprintf(stderr, "Error: %s> H5Dclose failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Dclose failed.\n", FILE4_1);
         status = FAIL;
     }
     if(fileid1 >= 0 && H5Fclose(fileid1) < 0) {
-        fprintf(stderr, "Error: %s> H5Fclose failed.\n", FILE4_1);
+        HDfprintf(stderr, "Error: %s> H5Fclose failed.\n", FILE4_1);
         status = FAIL;
     }
 
@@ -915,7 +933,7 @@ static void gent_udlink(void)
     /* This ud link will dangle, but that's okay */
     fid = H5Fcreate(FILE54, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
     H5Lcreate_ud(fid, "udlink1", (H5L_type_t)MY_LINKCLASS, NULL, 0, H5P_DEFAULT, H5P_DEFAULT);
-    strcpy(buf, "foo");
+    HDstrcpy(buf, "foo");
     H5Lcreate_ud(fid, "udlink2", (H5L_type_t)MY_LINKCLASS, buf, 4, H5P_DEFAULT, H5P_DEFAULT);
 
     H5Fclose(fid);
@@ -1820,7 +1838,7 @@ static void gent_str(void) {
                 for(l = 0; l < 10; l++)
                     comp1[i][j].a[k][l] = (l + j + k) * (l + j + k);
             for(k = 0 ; k < 12; k++)
-                strcpy(comp1[i][j].s[k], "abcdefgh12345678abcdefgh12345678");
+                HDstrcpy(comp1[i][j].s[k], "abcdefgh12345678abcdefgh12345678");
         }
 
     dataset = H5Dcreate2(fid, "/comp1", f_type, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
@@ -2452,7 +2470,7 @@ static void gent_nestcomp(void)
      */
     status = H5Dwrite(dataset, s2_tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, s1);
     if(status < 0)
-        fprintf(stderr, "gent_nestcomp H5Dwrite failed\n");
+        HDfprintf(stderr, "gent_nestcomp H5Dwrite failed\n");
 
     /*
      * Release resources
@@ -10119,7 +10137,7 @@ static void gent_vlenstr_array(void)
 
             if ((dset = H5Dcreate2(file, F83_DATASETNAME2, type, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) >= 0) {
                 if (H5Dwrite(dset, type, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf) < 0)
-                    fprintf(stderr, "gent_vlenstr_array H5Dwrite failed\n");
+                    HDfprintf(stderr, "gent_vlenstr_array H5Dwrite failed\n");
 
                 H5Dclose(dset);
             }
@@ -10132,6 +10150,119 @@ static void gent_vlenstr_array(void)
     H5Fclose(file);
 }
 
+/*-------------------------------------------------------------------------
+ * Function:    gent_udfilter
+ *
+ * Purpose:     Generate a file to be used in testing user defined filter plugin3.
+ *-------------------------------------------------------------------------
+ */
+static void gent_udfilter(void)
+{
+    hid_t    fid;  /* file id */
+    hid_t    dcpl; /* dataset creation property list */
+    hid_t    sid;  /* dataspace ID */
+    hid_t    tid;  /* datatype ID */
+
+    hsize_t  dims1[RANK]      = {DIM1,DIM2};
+    hsize_t  chunk_dims[RANK] = {CDIM1,CDIM2};
+    int      buf1[DIM1][DIM2];
+    int      i, j, n, ret;
+
+    for(i=n=0; i<DIM1; i++){
+        for(j=0; j<DIM2; j++){
+            buf1[i][j]=n++;
+        }
+    }
+
+    /* create a file */
+    fid  = H5Fcreate(FILE84, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
+    HDassert(fid>=0);
+
+    /* create a space */
+    sid = H5Screate_simple(SPACE2_RANK, dims1, NULL);
+
+    dcpl = H5Pcreate(H5P_DATASET_CREATE);
+    HDassert(dcpl>=0);
+
+    ret = H5Pset_layout(dcpl, H5D_CHUNKED);
+    HDassert(ret >= 0);
+
+    ret = H5Pset_chunk(dcpl, SPACE2_RANK, chunk_dims);
+    HDassert(ret >= 0);
+
+    ret = H5Zregister (H5Z_DYNLIB2);
+    HDassert(ret >= 0);
+
+    ret = H5Pset_filter (dcpl, H5Z_FILTER_DYNLIB2, H5Z_FLAG_MANDATORY, 0, NULL);
+    HDassert(ret >= 0);
+
+    ret=make_dset(fid, "dynlib2", sid, H5T_NATIVE_INT, dcpl, buf1);
+    HDassert(ret >= 0);
+
+    /* remove the filters from the dcpl */
+    ret = H5Premove_filter(dcpl, H5Z_FILTER_ALL);
+    HDassert(ret >= 0);
+
+    /*-------------------------------------------------------------------------
+     * close
+     *-------------------------------------------------------------------------
+     */
+    ret = H5Sclose(sid);
+    HDassert(ret >= 0);
+
+    ret = H5Pclose(dcpl);
+    HDassert(ret >= 0);
+
+    ret = H5Fclose(fid);
+    HDassert(ret >= 0);
+}
+
+/*-------------------------------------------------------------------------
+ * Function:    H5Z_filter_dynlib2
+ *
+ * Purpose:    A dynlib2 filter method that multiplies the original value
+ *              during write and divide the original value during read. It
+ *              will be built as a shared library.  tools tests will load
+ *              and use this filter as a plugin library.
+ *
+ * Return:    Success:    Data chunk size
+ *
+ *        Failure:    0
+ *-------------------------------------------------------------------------
+ */
+static size_t
+H5Z_filter_dynlib2(unsigned int flags, size_t cd_nelmts,
+      const unsigned int *cd_values, size_t nbytes,
+      size_t *buf_size, void **buf)
+{
+    int *int_ptr = (int *)*buf;          /* Pointer to the data values */
+    size_t buf_left = *buf_size;  /* Amount of data buffer left to process */
+
+    /* Check for the correct number of parameters */
+    if(cd_nelmts > 0)
+        return(0);
+
+    /* Assignment to eliminate unused parameter warning. */
+    cd_values = cd_values;
+
+    if(flags & H5Z_FLAG_REVERSE) { /*read*/
+        /* Divide the original value with MULTIPLIER */
+        while(buf_left > 0) {
+            *int_ptr++ /= MULTIPLIER;
+            buf_left -= sizeof(int);
+        } /* end while */
+    } /* end if */
+    else { /*write*/
+        /* Multiply the original value with MULTIPLIER */
+        while(buf_left > 0) {
+            *int_ptr++ *= MULTIPLIER;
+            buf_left -= sizeof(int);
+        } /* end while */
+    } /* end else */
+
+    return nbytes;
+} /* end H5Z_filter_dynlib2() */
+
 
 /*-------------------------------------------------------------------------
  * Function: main
@@ -10227,6 +10358,8 @@ int main(void)
 
     gent_intsfourdims();
 
+    gent_udfilter();
+
     return 0;
 }
 
diff --git a/tools/h5dump/testh5dump.sh.in b/tools/h5dump/testh5dump.sh.in
index a5e8c4e..a9302ef 100644
--- a/tools/h5dump/testh5dump.sh.in
+++ b/tools/h5dump/testh5dump.sh.in
@@ -404,10 +404,10 @@ COPY_TESTFILES_TO_TESTDIR()
             INODE_SDIR=`$LS -i -d $SDIR | $AWK -F' ' '{print $1}'`
             INODE_DDIR=`$LS -i -d $TESTDIR | $AWK -F' ' '{print $1}'`
             if [ "$INODE_SDIR" != "$INODE_DDIR" ]; then
-    	        $CP -f $tstfile $TESTDIR
+                $CP -f $tstfile $TESTDIR
                 if [ $? -ne 0 ]; then
                     echo "Error: FAILED to copy $tstfile ."
-                
+
                     # Comment out this to CREATE expected file
                     exit $EXIT_FAILURE
                 fi
@@ -421,7 +421,7 @@ CLEAN_TESTFILES_AND_TESTDIR()
     # skip rm if srcdir is same as destdir
     # this occurs when build/test performed in source dir and
     # make cp fail
-    SDIR=`$DIRNAME $tstfile`
+    SDIR=$SRC_H5DUMP_TESTFILES
     INODE_SDIR=`$LS -i -d $SDIR | $AWK -F' ' '{print $1}'`
     INODE_DDIR=`$LS -i -d $TESTDIR | $AWK -F' ' '{print $1}'`
     if [ "$INODE_SDIR" != "$INODE_DDIR" ]; then
@@ -452,14 +452,14 @@ TESTING() {
 TOOLTEST() {
     # check if caseless compare and diff requested
     if [ "$1" = ignorecase ]; then
-	caseless="-i"
-	# replace cmp with diff which runs much longer.
-	xCMP="$DIFF -i"
-	shift
+    caseless="-i"
+    # replace cmp with diff which runs much longer.
+    xCMP="$DIFF -i"
+    shift
     else
-	caseless=""
-	# stick with faster cmp if ignorecase is not requested.
-	xCMP="$CMP"
+    caseless=""
+    # stick with faster cmp if ignorecase is not requested.
+    xCMP="$CMP"
     fi
 
     expect="$TESTDIR/$1"
@@ -548,7 +548,7 @@ TOOLTEST2() {
      nerrors="`expr $nerrors + 1`"
      test yes = "$verbose" && $DIFF $expect $actual |sed 's/^/    /'
     fi
-    
+
     # Clean up output file
     if test -z "$HDF5_NOCLEANUP"; then
      rm -f $actual $actualdata $actual_err
@@ -556,7 +556,7 @@ TOOLTEST2() {
 
 }
 
-# same as TOOLTEST2 but compares generated file to expected ddl file 
+# same as TOOLTEST2 but compares generated file to expected ddl file
 #                   and compares the generated data file to the expected data file
 # used for the binary tests that expect a full path in -o without -b
 # ADD_H5_TEST_EXPORT
@@ -614,7 +614,7 @@ TOOLTEST2A() {
      nerrors="`expr $nerrors + 1`"
      test yes = "$verbose" && $DIFF $expect $actual |sed 's/^/    /'
     fi
-    
+
     # Clean up output file
     if test -z "$HDF5_NOCLEANUP"; then
      rm -f $actual $actualdata $actual_err $actualmeta
@@ -653,7 +653,7 @@ TOOLTEST2B() {
       nerrors="`expr $nerrors + 1`"
       test yes = "$verbose" && $DIFF $expectdata $actualdata |sed 's/^/    /'
     fi
-    
+
     # Clean up output file
     if test -z "$HDF5_NOCLEANUP"; then
      rm -f $actual $actualdata $actual_err
@@ -870,7 +870,7 @@ TOOLTEST_HELP() {
       echo "    Expected output (*.txt) differs from actual output (*.out)"
       nerrors="`expr $nerrors + 1`"
     fi
-    
+
     # Clean up output file
     if test -z "$HDF5_NOCLEANUP"; then
      rm -f $actual $actual_err
@@ -883,7 +883,7 @@ SKIP() {
    TESTING $DUMPER $@
     echo  " -SKIP-"
 }
-  
+
 # Print a line-line message left justified in a field of 70 characters
 #
 PRINT_H5DIFF() {
@@ -894,7 +894,7 @@ PRINT_H5DIFF() {
 
 # Call the h5diff tool
 #
-DIFFTEST() 
+DIFFTEST()
 {
     PRINT_H5DIFF  $@
     (
@@ -908,7 +908,7 @@ DIFFTEST()
     else
          echo " PASSED"
     fi
-        
+
 }
 
 # Print a line-line message left justified in a field of 70 characters
@@ -921,7 +921,7 @@ PRINT_H5IMPORT() {
 
 # Call the h5import tool
 #
-IMPORTTEST() 
+IMPORTTEST()
 {
     # remove the output hdf5 file if it exists
     hdf5_file="$TESTDIR/$5"
@@ -932,7 +932,7 @@ IMPORTTEST()
     PRINT_H5IMPORT  $@
     (
   cd $TESTDIR
-  $RUNSERIAL $H5IMPORT_BIN "$@" 
+  $RUNSERIAL $H5IMPORT_BIN "$@"
     )
     RET=$?
     if [ $RET != 0 ] ; then
@@ -941,7 +941,7 @@ IMPORTTEST()
     else
          echo " PASSED"
     fi
-        
+
 }
 
 
@@ -1032,7 +1032,7 @@ TOOLTEST tcomp-1.ddl --enable-error-stack tcompound.h5
 # test for named data types
 TOOLTEST tcomp-2.ddl --enable-error-stack -t /type1 --datatype /type2 --datatype=/group1/type3 tcompound.h5
 TOOLTEST tcomp-2.ddl --enable-error-stack -N /type1 --any_path /type2 --any_path=/group1/type3 tcompound.h5
-# test for unamed type 
+# test for unamed type
 TOOLTEST4 tcomp-3.ddl --enable-error-stack -t /#6632 -g /group2 tcompound.h5
 # test complicated compound datatype
 TOOLTEST tcomp-4.ddl --enable-error-stack tcompound_complex.h5
@@ -1055,7 +1055,7 @@ TOOLTEST tall-7N.ddl --enable-error-stack -N attr1 tall.h5
 # test for loop detection
 TOOLTEST tloop-1.ddl --enable-error-stack tloop.h5
 
-# test for string 
+# test for string
 TOOLTEST tstr-1.ddl --enable-error-stack tstr.h5
 TOOLTEST tstr-2.ddl --enable-error-stack tstr2.h5
 
@@ -1156,7 +1156,7 @@ TOOLTEST tcompact.ddl --enable-error-stack -H -p -d compact tfilters.h5
 TOOLTEST tcontiguos.ddl --enable-error-stack -H -p -d contiguous tfilters.h5
 # chunked
 TOOLTEST tchunked.ddl --enable-error-stack -H -p -d chunked tfilters.h5
-# external 
+# external
 TOOLTEST texternal.ddl --enable-error-stack -H -p -d external tfilters.h5
 
 # fill values
@@ -1225,7 +1225,7 @@ fi
 # test for displaying objects with very long names
 TOOLTEST tlonglinks.ddl --enable-error-stack tlonglinks.h5
 
-# dimensions over 4GB, print boundary 
+# dimensions over 4GB, print boundary
 TOOLTEST tbigdims.ddl --enable-error-stack -d dset4gb -s 4294967284 -c 22 tbigdims.h5
 
 # hyperslab read
@@ -1233,7 +1233,7 @@ TOOLTEST thyperslab.ddl --enable-error-stack thyperslab.h5
 
 
 #
-    
+
 # test for displaying dataset and attribute of null space
 TOOLTEST tnullspace.ddl --enable-error-stack tnullspace.h5
 
@@ -1272,7 +1272,7 @@ IMPORTTEST out3.bin -c tbin3.ddl -o out3D.h5
 DIFFTEST   tbinary.h5 out3D.h5 /integer /integer
 
 TOOLTEST   tbin4.ddl --enable-error-stack -d double  -b FILE -o out4.bin    tbinary.h5
-   
+
 # Clean up binary output files
 if test -z "$HDF5_NOCLEANUP"; then
  rm -f out[1-4].bin
@@ -1280,7 +1280,7 @@ if test -z "$HDF5_NOCLEANUP"; then
  rm -f out3.h5
 fi
 
-# test for dataset region references 
+# test for dataset region references
 TOOLTEST  tdatareg.ddl --enable-error-stack tdatareg.h5
 TOOLTEST4 tdataregR.ddl --enable-error-stack -R tdatareg.h5
 TOOLTEST  tattrreg.ddl --enable-error-stack tattrreg.h5
diff --git a/tools/h5dump/testh5dumppbits.sh.in b/tools/h5dump/testh5dumppbits.sh.in
index 4211c63..446020a 100644
--- a/tools/h5dump/testh5dumppbits.sh.in
+++ b/tools/h5dump/testh5dumppbits.sh.in
@@ -190,7 +190,7 @@ CLEAN_TESTFILES_AND_TESTDIR()
     # skip rm if srcdir is same as destdir
     # this occurs when build/test performed in source dir and
     # make cp fail
-    SDIR=`$DIRNAME $tstfile`
+    SDIR=$SRC_H5DUMP_TESTFILES/pbits
     INODE_SDIR=`$LS -i -d $SDIR | $AWK -F' ' '{print $1}'`
     INODE_DDIR=`$LS -i -d $TESTDIR | $AWK -F' ' '{print $1}'`
     if [ "$INODE_SDIR" != "$INODE_DDIR" ]; then
diff --git a/tools/h5dump/testh5dumpxml.sh.in b/tools/h5dump/testh5dumpxml.sh.in
index 1efde85..33a67c0 100644
--- a/tools/h5dump/testh5dumpxml.sh.in
+++ b/tools/h5dump/testh5dumpxml.sh.in
@@ -221,7 +221,7 @@ CLEAN_TESTFILES_AND_TESTDIR()
     # skip rm if srcdir is same as destdir
     # this occurs when build/test performed in source dir and
     # make cp fail
-    SDIR=`$DIRNAME $tstfile`
+    SDIR=$SRC_H5DUMP_TESTFILES
     INODE_SDIR=`$LS -i -d $SDIR | $AWK -F' ' '{print $1}'`
     INODE_DDIR=`$LS -i -d $TESTDIR | $AWK -F' ' '{print $1}'`
     if [ "$INODE_SDIR" != "$INODE_DDIR" ]; then
diff --git a/tools/h5ls/CMakeLists.txt b/tools/h5ls/CMakeLists.txt
index 139f440..80bd2f7 100644
--- a/tools/h5ls/CMakeLists.txt
+++ b/tools/h5ls/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.1.0)
+cmake_minimum_required (VERSION 3.2.2)
 PROJECT (HDF5_TOOLS_H5LS)
 
 #-----------------------------------------------------------------------------
@@ -22,6 +22,34 @@ set (H5_DEP_EXECUTABLES
 
 if (BUILD_TESTING)
 
+  #-----------------------------------------------------------------------------
+  # If plugin library tests can be tested
+  #-----------------------------------------------------------------------------
+  set (HDF5_TOOL_PLUGIN_LIB_CORENAME         "dynlibls")
+  set (HDF5_TOOL_PLUGIN_LIB_NAME             "${HDF5_EXTERNAL_LIB_PREFIX}${HDF5_TOOL_PLUGIN_LIB_CORENAME}")
+  set (HDF5_TOOL_PLUGIN_LIB_TARGET           ${HDF5_TOOL_PLUGIN_LIB_CORENAME})
+  add_definitions (${HDF_EXTRA_C_FLAGS})
+  INCLUDE_DIRECTORIES (${HDF5_SRC_DIR})
+
+  add_library (${HDF5_TOOL_PLUGIN_LIB_TARGET} SHARED dynlib_ls.c)
+  TARGET_C_PROPERTIES (${HDF5_TOOL_PLUGIN_LIB_TARGET} SHARED " " " ")
+  target_link_libraries (${HDF5_TOOL_PLUGIN_LIB_TARGET} ${HDF5_TEST_LIB_TARGET})
+  H5_SET_LIB_OPTIONS (${HDF5_TOOL_PLUGIN_LIB_TARGET} ${HDF5_TOOL_PLUGIN_LIB_NAME} SHARED ${HDF5_PACKAGE_SOVERSION})
+
+  # make plugins dir
+  file (MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/plugins")
+  #-----------------------------------------------------------------------------
+  # Copy plugin library to a plugins folder
+  #-----------------------------------------------------------------------------
+  add_custom_command (
+      TARGET     ${HDF5_TOOL_PLUGIN_LIB_TARGET}
+      POST_BUILD
+      COMMAND    ${CMAKE_COMMAND}
+      ARGS       -E copy_if_different
+          "$<TARGET_FILE:${HDF5_TOOL_PLUGIN_LIB_TARGET}>"
+          "${CMAKE_BINARY_DIR}/plugins/$<TARGET_FILE_NAME:${HDF5_TOOL_PLUGIN_LIB_TARGET}>"
+  )
+
   include (CMakeTests.cmake)
 
 endif (BUILD_TESTING)
diff --git a/tools/h5ls/CMakeTests.cmake b/tools/h5ls/CMakeTests.cmake
index eda990d..f790ed9 100644
--- a/tools/h5ls/CMakeTests.cmake
+++ b/tools/h5ls/CMakeTests.cmake
@@ -29,6 +29,7 @@
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tslink.h5
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tsoftlinks.h5
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tstr.h5
+      ${HDF5_TOOLS_SRC_DIR}/testfiles/tudfilter.h5
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tudlink.h5
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tvldtypes1.h5
   )
@@ -86,6 +87,7 @@
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tsaf.ls
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tslink-1.ls
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tstr-1.ls
+      ${HDF5_TOOLS_DIR}/testfiles/tudfilter.ls
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tudlink-1.ls
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tvldtypes1.ls
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tvldtypes2le.ls
@@ -98,7 +100,7 @@
   foreach (listfiles ${LIST_HDF5_TEST_FILES} ${LIST_OTHER_TEST_FILES})
     get_filename_component(fname "${listfiles}" NAME)
     HDFTEST_COPY_FILE("${listfiles}" "${PROJECT_BINARY_DIR}/testfiles/${fname}" "h5ls_files")
-  endforeach (listfiles ${LIST_HDF5_TEST_FILES} ${LIST_OTHER_TEST_FILES})
+  endforeach ()
   add_custom_target(h5ls_files ALL COMMENT "Copying files needed by h5ls tests" DEPENDS ${h5ls_files_list})
 
 ##############################################################################
@@ -118,14 +120,33 @@
       if (NOT "${last_test}" STREQUAL "")
         set_tests_properties (H5LS-${resultfile} PROPERTIES DEPENDS ${last_test})
       endif ()
-    else (HDF5_ENABLE_USING_MEMCHECKER)
+    else ()
       add_test (
-          NAME H5LS-${resultfile}-clear-objects
+          NAME H5LS-${resultfile}
+          COMMAND "${CMAKE_COMMAND}"
+              -D "TEST_PROGRAM=$<TARGET_FILE:h5ls>"
+              -D "TEST_ARGS=${ARGN}"
+              -D "TEST_FOLDER=${PROJECT_BINARY_DIR}/testfiles"
+              -D "TEST_OUTPUT=${resultfile}.out"
+              -D "TEST_EXPECT=${resultcode}"
+              -D "TEST_REFERENCE=${resultfile}.ls"
+              -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
+      )
+    endif ()
+  ENDMACRO ()
+
+  MACRO (ADD_H5_UD_TEST testname resultcode resultfile)
+    if (NOT HDF5_ENABLE_USING_MEMCHECKER)
+      # Remove any output file left over from previous test run
+      add_test (
+          NAME H5LS_UD-${testname}-clearall-objects
           COMMAND    ${CMAKE_COMMAND}
-              -E remove ./testfiles/${resultfile}.out ./testfiles/${resultfile}.out.err
+              -E remove
+              testfiles/${resultfile}.out
+              testfiles/${resultfile}.out.err
       )
       add_test (
-          NAME H5LS-${resultfile}
+          NAME H5LS_UD-${testname}
           COMMAND "${CMAKE_COMMAND}"
               -D "TEST_PROGRAM=$<TARGET_FILE:h5ls>"
               -D "TEST_ARGS=${ARGN}"
@@ -133,11 +154,13 @@
               -D "TEST_OUTPUT=${resultfile}.out"
               -D "TEST_EXPECT=${resultcode}"
               -D "TEST_REFERENCE=${resultfile}.ls"
+              -D "TEST_ENV_VAR=HDF5_PLUGIN_PATH"
+              -D "TEST_ENV_VALUE=${CMAKE_BINARY_DIR}/plugins"
               -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
       )
-      set_tests_properties (H5LS-${resultfile} PROPERTIES DEPENDS "H5LS-${resultfile}-clear-objects")
-    endif (HDF5_ENABLE_USING_MEMCHECKER)
-  ENDMACRO (ADD_H5_TEST file)
+      set_tests_properties (H5LS_UD-${testname} PROPERTIES DEPENDS H5LS_UD-${testname}-clearall-objects)
+    endif ()
+  ENDMACRO ()
 
 ##############################################################################
 ##############################################################################
@@ -258,11 +281,25 @@
           tvldtypes2be.out
           tvldtypes2be.out.err
     )
+    set_tests_properties (H5LS-clearall-objects PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles")
     if (NOT "${last_test}" STREQUAL "")
       set_tests_properties (H5LS-clearall-objects PROPERTIES DEPENDS ${last_test})
-    endif (NOT "${last_test}" STREQUAL "")
+    endif ()
     set (last_test "H5LS-clearall-objects")
-  endif (HDF5_ENABLE_USING_MEMCHECKER)
+  endif ()
+
+# See which filters are usable (and skip tests for filters we
+# don't have).  Do this by searching H5pubconf.h to see which
+# filters are defined.
+
+# detect whether the encoder is present.
+  if (H5_HAVE_FILTER_DEFLATE)
+    set (USE_FILTER_DEFLATE "true")
+  endif ()
+
+  if (H5_HAVE_FILTER_SZIP)
+    set (USE_FILTER_SZIP "true")
+  endif ()
 
   # test the help syntax
   ADD_H5_TEST (help-1 0 -w80 -h)
@@ -393,3 +430,9 @@
   else (H5_WORDS_BIGENDIAN)
     ADD_H5_TEST (tdataregle 0 -v tdatareg.h5)
   endif (H5_WORDS_BIGENDIAN)
+
+##############################################################################
+###    P L U G I N  T E S T S
+##############################################################################
+ADD_H5_UD_TEST (h5ls_plugin_test 0 tudfilter -w80 -v -d tudfilter.h5)
+  
\ No newline at end of file
diff --git a/tools/h5ls/Makefile.am b/tools/h5ls/Makefile.am
index 408ce93..bee5d79 100644
--- a/tools/h5ls/Makefile.am
+++ b/tools/h5ls/Makefile.am
@@ -27,6 +27,11 @@ AM_CPPFLAGS+=-I$(top_srcdir)/src -I$(top_srcdir)/tools/lib
 TEST_SCRIPT=testh5ls.sh
 check_SCRIPTS=$(TEST_SCRIPT)
 SCRIPT_DEPEND=h5ls$(EXEEXT)
+if HAVE_SHARED_CONDITIONAL
+if USE_PLUGINS_CONDITIONAL
+   TEST_SCRIPT += h5ls_plugin.sh
+endif
+endif
 
 # This is our main target, the h5ls tool
 bin_PROGRAMS=h5ls
@@ -37,4 +42,15 @@ h5ls_LDFLAGS = $(LT_STATIC_EXEC) $(AM_LDFLAGS)
 # All programs depend on the hdf5 and h5tools libraries
 LDADD=$(LIBH5TOOLS) $(LIBHDF5)
 
+if HAVE_SHARED_CONDITIONAL
+  # Build it as shared library if configure is enabled for shared library.
+  lib_LTLIBRARIES=libdynlibls.la
+  libdynlibls_la_SOURCES=dynlib_ls.c
+
+install-exec-hook:
+	$(RM) $(DESTDIR)$(libdir)/*dynlib*
+endif
+
+DISTCLEANFILES=h5ls_plugin.sh
+
 include $(top_srcdir)/config/conclude.am
diff --git a/tools/h5ls/Makefile.in b/tools/h5ls/Makefile.in
index 97fa0c6..317fb8b 100644
--- a/tools/h5ls/Makefile.in
+++ b/tools/h5ls/Makefile.in
@@ -31,6 +31,7 @@
 # HDF5 Library Makefile(.in)
 #
 
+
 VPATH = @srcdir@
 am__is_gnu_make = { \
   if test -z '$(MAKELEVEL)'; then \
@@ -105,6 +106,7 @@ PRE_UNINSTALL = :
 POST_UNINSTALL = :
 build_triplet = @build@
 host_triplet = @host@
+@HAVE_SHARED_CONDITIONAL_TRUE@@USE_PLUGINS_CONDITIONAL_TRUE@am__append_1 = h5ls_plugin.sh
 bin_PROGRAMS = h5ls$(EXEEXT)
 TESTS = $(TEST_SCRIPT)
 subdir = tools/h5ls
@@ -116,18 +118,53 @@ am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
 DIST_COMMON = $(srcdir)/Makefile.am $(am__DIST_COMMON)
 mkinstalldirs = $(SHELL) $(top_srcdir)/bin/mkinstalldirs
 CONFIG_HEADER = $(top_builddir)/src/H5config.h
-CONFIG_CLEAN_FILES = testh5ls.sh
+CONFIG_CLEAN_FILES = h5ls_plugin.sh testh5ls.sh
 CONFIG_CLEAN_VPATH_FILES =
-am__installdirs = "$(DESTDIR)$(bindir)"
+am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`;
+am__vpath_adj = case $$p in \
+    $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \
+    *) f=$$p;; \
+  esac;
+am__strip_dir = f=`echo $$p | sed -e 's|^.*/||'`;
+am__install_max = 40
+am__nobase_strip_setup = \
+  srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*|]/\\\\&/g'`
+am__nobase_strip = \
+  for p in $$list; do echo "$$p"; done | sed -e "s|$$srcdirstrip/||"
+am__nobase_list = $(am__nobase_strip_setup); \
+  for p in $$list; do echo "$$p $$p"; done | \
+  sed "s| $$srcdirstrip/| |;"' / .*\//!s/ .*/ ./; s,\( .*\)/[^/]*$$,\1,' | \
+  $(AWK) 'BEGIN { files["."] = "" } { files[$$2] = files[$$2] " " $$1; \
+    if (++n[$$2] == $(am__install_max)) \
+      { print $$2, files[$$2]; n[$$2] = 0; files[$$2] = "" } } \
+    END { for (dir in files) print dir, files[dir] }'
+am__base_list = \
+  sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \
+  sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g'
+am__uninstall_files_from_dir = { \
+  test -z "$$files" \
+    || { test ! -d "$$dir" && test ! -f "$$dir" && test ! -r "$$dir"; } \
+    || { echo " ( cd '$$dir' && rm -f" $$files ")"; \
+         $(am__cd) "$$dir" && rm -f $$files; }; \
+  }
+am__installdirs = "$(DESTDIR)$(libdir)" "$(DESTDIR)$(bindir)"
+LTLIBRARIES = $(lib_LTLIBRARIES)
+libdynlibls_la_LIBADD =
+am__libdynlibls_la_SOURCES_DIST = dynlib_ls.c
+@HAVE_SHARED_CONDITIONAL_TRUE@am_libdynlibls_la_OBJECTS =  \
+@HAVE_SHARED_CONDITIONAL_TRUE@	dynlib_ls.lo
+libdynlibls_la_OBJECTS = $(am_libdynlibls_la_OBJECTS)
+AM_V_lt = $(am__v_lt_@AM_V@)
+am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
+am__v_lt_0 = --silent
+am__v_lt_1 = 
+@HAVE_SHARED_CONDITIONAL_TRUE@am_libdynlibls_la_rpath = -rpath \
+@HAVE_SHARED_CONDITIONAL_TRUE@	$(libdir)
 PROGRAMS = $(bin_PROGRAMS)
 h5ls_SOURCES = h5ls.c
 h5ls_OBJECTS = h5ls.$(OBJEXT)
 h5ls_LDADD = $(LDADD)
 h5ls_DEPENDENCIES = $(LIBH5TOOLS) $(LIBHDF5)
-AM_V_lt = $(am__v_lt_@AM_V@)
-am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
-am__v_lt_0 = --silent
-am__v_lt_1 = 
 h5ls_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
 	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
 	$(h5ls_LDFLAGS) $(LDFLAGS) -o $@
@@ -165,8 +202,8 @@ AM_V_CCLD = $(am__v_CCLD_@AM_V@)
 am__v_CCLD_ = $(am__v_CCLD_@AM_DEFAULT_V@)
 am__v_CCLD_0 = @echo "  CCLD    " $@;
 am__v_CCLD_1 = 
-SOURCES = h5ls.c
-DIST_SOURCES = h5ls.c
+SOURCES = $(libdynlibls_la_SOURCES) h5ls.c
+DIST_SOURCES = $(am__libdynlibls_la_SOURCES_DIST) h5ls.c
 am__can_run_installinfo = \
   case $$AM_UPDATE_INFO_DIR in \
     n|no|NO) false;; \
@@ -213,33 +250,6 @@ am__tty_colors = { \
     std=''; \
   fi; \
 }
-am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`;
-am__vpath_adj = case $$p in \
-    $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \
-    *) f=$$p;; \
-  esac;
-am__strip_dir = f=`echo $$p | sed -e 's|^.*/||'`;
-am__install_max = 40
-am__nobase_strip_setup = \
-  srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*|]/\\\\&/g'`
-am__nobase_strip = \
-  for p in $$list; do echo "$$p"; done | sed -e "s|$$srcdirstrip/||"
-am__nobase_list = $(am__nobase_strip_setup); \
-  for p in $$list; do echo "$$p $$p"; done | \
-  sed "s| $$srcdirstrip/| |;"' / .*\//!s/ .*/ ./; s,\( .*\)/[^/]*$$,\1,' | \
-  $(AWK) 'BEGIN { files["."] = "" } { files[$$2] = files[$$2] " " $$1; \
-    if (++n[$$2] == $(am__install_max)) \
-      { print $$2, files[$$2]; n[$$2] = 0; files[$$2] = "" } } \
-    END { for (dir in files) print dir, files[dir] }'
-am__base_list = \
-  sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \
-  sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g'
-am__uninstall_files_from_dir = { \
-  test -z "$$files" \
-    || { test ! -d "$$dir" && test ! -f "$$dir" && test ! -r "$$dir"; } \
-    || { echo " ( cd '$$dir' && rm -f" $$files ")"; \
-         $(am__cd) "$$dir" && rm -f $$files; }; \
-  }
 am__recheck_rx = ^[ 	]*:recheck:[ 	]*
 am__global_test_result_rx = ^[ 	]*:global-test-result:[ 	]*
 am__copy_in_global_log_rx = ^[ 	]*:copy-in-global-log:[ 	]*
@@ -391,9 +401,10 @@ am__set_b = \
     *) \
       b='$*';; \
   esac
-am__DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/testh5ls.sh.in \
-	$(top_srcdir)/bin/depcomp $(top_srcdir)/bin/mkinstalldirs \
-	$(top_srcdir)/bin/test-driver $(top_srcdir)/config/commence.am \
+am__DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/h5ls_plugin.sh.in \
+	$(srcdir)/testh5ls.sh.in $(top_srcdir)/bin/depcomp \
+	$(top_srcdir)/bin/mkinstalldirs $(top_srcdir)/bin/test-driver \
+	$(top_srcdir)/config/commence.am \
 	$(top_srcdir)/config/conclude.am
 DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = @ACLOCAL@
@@ -667,7 +678,7 @@ TRACE = perl $(top_srcdir)/bin/trace
 CHECK_CLEANFILES = *.chkexe *.chklog *.clog *.clog2
 
 # Test programs and scripts
-TEST_SCRIPT = testh5ls.sh
+TEST_SCRIPT = testh5ls.sh $(am__append_1)
 check_SCRIPTS = $(TEST_SCRIPT)
 SCRIPT_DEPEND = h5ls$(EXEEXT)
 
@@ -676,6 +687,9 @@ h5ls_LDFLAGS = $(LT_STATIC_EXEC) $(AM_LDFLAGS)
 
 # All programs depend on the hdf5 and h5tools libraries
 LDADD = $(LIBH5TOOLS) $(LIBHDF5)
+@HAVE_SHARED_CONDITIONAL_TRUE@lib_LTLIBRARIES = libdynlibls.la
+@HAVE_SHARED_CONDITIONAL_TRUE@libdynlibls_la_SOURCES = dynlib_ls.c
+DISTCLEANFILES = h5ls_plugin.sh
 
 # Automake needs to be taught how to build lib, progs, and tests targets.
 # These will be filled in automatically for the most part (e.g.,
@@ -730,8 +744,48 @@ $(top_srcdir)/configure: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
 $(ACLOCAL_M4): @MAINTAINER_MODE_TRUE@ $(am__aclocal_m4_deps)
 	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
 $(am__aclocal_m4_deps):
+h5ls_plugin.sh: $(top_builddir)/config.status $(srcdir)/h5ls_plugin.sh.in
+	cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@
 testh5ls.sh: $(top_builddir)/config.status $(srcdir)/testh5ls.sh.in
 	cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@
+
+install-libLTLIBRARIES: $(lib_LTLIBRARIES)
+	@$(NORMAL_INSTALL)
+	@list='$(lib_LTLIBRARIES)'; test -n "$(libdir)" || list=; \
+	list2=; for p in $$list; do \
+	  if test -f $$p; then \
+	    list2="$$list2 $$p"; \
+	  else :; fi; \
+	done; \
+	test -z "$$list2" || { \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(libdir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(libdir)" || exit 1; \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 '$(DESTDIR)$(libdir)'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 "$(DESTDIR)$(libdir)"; \
+	}
+
+uninstall-libLTLIBRARIES:
+	@$(NORMAL_UNINSTALL)
+	@list='$(lib_LTLIBRARIES)'; test -n "$(libdir)" || list=; \
+	for p in $$list; do \
+	  $(am__strip_dir) \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f '$(DESTDIR)$(libdir)/$$f'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f "$(DESTDIR)$(libdir)/$$f"; \
+	done
+
+clean-libLTLIBRARIES:
+	-test -z "$(lib_LTLIBRARIES)" || rm -f $(lib_LTLIBRARIES)
+	@list='$(lib_LTLIBRARIES)'; \
+	locs=`for p in $$list; do echo $$p; done | \
+	      sed 's|^[^/]*$$|.|; s|/[^/]*$$||; s|$$|/so_locations|' | \
+	      sort -u`; \
+	test -z "$$locs" || { \
+	  echo rm -f $${locs}; \
+	  rm -f $${locs}; \
+	}
+
+libdynlibls.la: $(libdynlibls_la_OBJECTS) $(libdynlibls_la_DEPENDENCIES) $(EXTRA_libdynlibls_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(LINK) $(am_libdynlibls_la_rpath) $(libdynlibls_la_OBJECTS) $(libdynlibls_la_LIBADD) $(LIBS)
 install-binPROGRAMS: $(bin_PROGRAMS)
 	@$(NORMAL_INSTALL)
 	@list='$(bin_PROGRAMS)'; test -n "$(bindir)" || list=; \
@@ -792,6 +846,7 @@ mostlyclean-compile:
 distclean-compile:
 	-rm -f *.tab.c
 
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dynlib_ls.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/h5ls.Po@am__quote@
 
 .c.o:
@@ -1052,9 +1107,11 @@ check-am: all-am
 	$(MAKE) $(AM_MAKEFLAGS) $(check_SCRIPTS)
 	$(MAKE) $(AM_MAKEFLAGS) check-TESTS
 check: check-am
-all-am: Makefile $(PROGRAMS) all-local
+all-am: Makefile $(LTLIBRARIES) $(PROGRAMS) all-local
+install-binPROGRAMS: install-libLTLIBRARIES
+
 installdirs:
-	for dir in "$(DESTDIR)$(bindir)"; do \
+	for dir in "$(DESTDIR)$(libdir)" "$(DESTDIR)$(bindir)"; do \
 	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
 	done
 install: install-am
@@ -1086,13 +1143,16 @@ clean-generic:
 distclean-generic:
 	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
 	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+	-test -z "$(DISTCLEANFILES)" || rm -f $(DISTCLEANFILES)
 
 maintainer-clean-generic:
 	@echo "This command is intended for maintainers to use"
 	@echo "it deletes files that may require special tools to rebuild."
+@HAVE_SHARED_CONDITIONAL_FALSE@install-exec-hook:
 clean: clean-am
 
-clean-am: clean-binPROGRAMS clean-generic clean-libtool mostlyclean-am
+clean-am: clean-binPROGRAMS clean-generic clean-libLTLIBRARIES \
+	clean-libtool mostlyclean-am
 
 distclean: distclean-am
 	-rm -rf ./$(DEPDIR)
@@ -1118,8 +1178,9 @@ install-dvi: install-dvi-am
 
 install-dvi-am:
 
-install-exec-am: install-binPROGRAMS
-
+install-exec-am: install-binPROGRAMS install-libLTLIBRARIES
+	@$(NORMAL_INSTALL)
+	$(MAKE) $(AM_MAKEFLAGS) install-exec-hook
 install-html: install-html-am
 
 install-html-am:
@@ -1158,24 +1219,26 @@ ps: ps-am
 
 ps-am:
 
-uninstall-am: uninstall-binPROGRAMS
+uninstall-am: uninstall-binPROGRAMS uninstall-libLTLIBRARIES
 
-.MAKE: check-am install-am install-strip
+.MAKE: check-am install-am install-exec-am install-strip
 
 .PHONY: CTAGS GTAGS TAGS all all-am all-local check check-TESTS \
-	check-am clean clean-binPROGRAMS clean-generic clean-libtool \
-	cscopelist-am ctags ctags-am distclean distclean-compile \
-	distclean-generic distclean-libtool distclean-tags distdir dvi \
-	dvi-am html html-am info info-am install install-am \
-	install-binPROGRAMS install-data install-data-am install-dvi \
-	install-dvi-am install-exec install-exec-am install-html \
-	install-html-am install-info install-info-am install-man \
-	install-pdf install-pdf-am install-ps install-ps-am \
-	install-strip installcheck installcheck-am installdirs \
-	maintainer-clean maintainer-clean-generic mostlyclean \
-	mostlyclean-compile mostlyclean-generic mostlyclean-libtool \
-	mostlyclean-local pdf pdf-am ps ps-am recheck tags tags-am \
-	uninstall uninstall-am uninstall-binPROGRAMS
+	check-am clean clean-binPROGRAMS clean-generic \
+	clean-libLTLIBRARIES clean-libtool cscopelist-am ctags \
+	ctags-am distclean distclean-compile distclean-generic \
+	distclean-libtool distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-binPROGRAMS \
+	install-data install-data-am install-dvi install-dvi-am \
+	install-exec install-exec-am install-exec-hook install-html \
+	install-html-am install-info install-info-am \
+	install-libLTLIBRARIES install-man install-pdf install-pdf-am \
+	install-ps install-ps-am install-strip installcheck \
+	installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-libtool mostlyclean-local pdf \
+	pdf-am ps ps-am recheck tags tags-am uninstall uninstall-am \
+	uninstall-binPROGRAMS uninstall-libLTLIBRARIES
 
 .PRECIOUS: Makefile
 
@@ -1191,6 +1254,11 @@ uninstall-am: uninstall-binPROGRAMS
 help:
 	@$(top_srcdir)/bin/makehelp
 
+@HAVE_SHARED_CONDITIONAL_TRUE@  # Build it as shared library if configure is enabled for shared library.
+
+@HAVE_SHARED_CONDITIONAL_TRUE@install-exec-hook:
+@HAVE_SHARED_CONDITIONAL_TRUE@	$(RM) $(DESTDIR)$(libdir)/*dynlib*
+
 # lib/progs/tests targets recurse into subdirectories. build-* targets
 # build files in this directory.
 build-lib: $(LIB)
diff --git a/tools/h5ls/dynlib_ls.c b/tools/h5ls/dynlib_ls.c
new file mode 100644
index 0000000..0d8be2b
--- /dev/null
+++ b/tools/h5ls/dynlib_ls.c
@@ -0,0 +1,94 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5. The full HDF5 copyright notice, including      *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic document set and is     *
+ * linked from the top-level documents page.  It can also be found at        *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have access   *
+ * to either file, you may request a copy from help@hdfgroup.org.            *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+/*
+ * Programmer:	Raymond Lu
+ *		13 February 2013
+ *
+ * Purpose:	Tests the plugin module (H5PL)
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include "H5PLextern.h"
+
+#define H5Z_FILTER_DYNLIB2      258 
+#define MULTIPLIER              3
+
+static size_t H5Z_filter_dynlib2(unsigned int flags, size_t cd_nelmts,
+                const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf);
+
+/* This message derives from H5Z */
+const H5Z_class2_t H5Z_DYNLIB2[1] = {{
+    H5Z_CLASS_T_VERS,                /* H5Z_class_t version             */
+    H5Z_FILTER_DYNLIB2,		     /* Filter id number		*/
+    1, 1,                            /* Encoding and decoding enabled   */
+    "dynlib2",			     /* Filter name for debugging	*/
+    NULL,                            /* The "can apply" callback        */
+    NULL,                            /* The "set local" callback        */
+    (H5Z_func_t)H5Z_filter_dynlib2,    /* The actual filter function	*/
+}};
+
+H5PL_type_t   H5PLget_plugin_type(void) {return H5PL_TYPE_FILTER;}
+const void   *H5PLget_plugin_info(void) {return H5Z_DYNLIB2;}
+
+/*-------------------------------------------------------------------------
+ * Function:	H5Z_filter_dynlib2
+ *
+ * Purpose:	A dynlib2 filter method that multiplies the original value 
+ *              during write and divide the original value during read. It
+ *              will be built as a shared library.  plugin.c test will load 
+ *              and use this filter library.    
+ *
+ * Return:	Success:	Data chunk size
+ *
+ *		Failure:	0
+ *
+ * Programmer:	Raymond Lu
+ *              29 March 2013
+ *
+ *-------------------------------------------------------------------------
+ */
+static size_t
+H5Z_filter_dynlib2(unsigned int flags, size_t cd_nelmts,
+      const unsigned int *cd_values, size_t nbytes,
+      size_t *buf_size, void **buf)
+{
+    int *int_ptr = (int *)*buf;          /* Pointer to the data values */
+    size_t buf_left = *buf_size;  /* Amount of data buffer left to process */
+
+    /* Check for the correct number of parameters */
+    if(cd_nelmts > 0)
+        return(0);
+
+    /* Assignment to eliminate unused parameter warning. */
+    cd_values = cd_values;
+
+    if(flags & H5Z_FLAG_REVERSE) { /*read*/
+        /* Divide the original value with MULTIPLIER */
+        while(buf_left > 0) {
+            *int_ptr++ /= MULTIPLIER;
+            buf_left -= sizeof(int);
+        } /* end while */
+    } /* end if */
+    else { /*write*/
+        /* Multiply the original value with MULTIPLIER */
+        while(buf_left > 0) {
+            *int_ptr++ *= MULTIPLIER;
+            buf_left -= sizeof(int);
+        } /* end while */
+    } /* end else */
+
+    return nbytes;
+} /* end H5Z_filter_dynlib2() */
+
diff --git a/tools/h5ls/h5ls_plugin.sh.in b/tools/h5ls/h5ls_plugin.sh.in
new file mode 100644
index 0000000..460ff6a
--- /dev/null
+++ b/tools/h5ls/h5ls_plugin.sh.in
@@ -0,0 +1,238 @@
+#! /bin/sh
+#
+# Copyright by The HDF Group.
+# All rights reserved.
+#
+# This file is part of HDF5. The full HDF5 copyright notice, including
+# terms governing use, modification, and redistribution, is contained in
+# the files COPYING and Copyright.html.  COPYING can be found at the root
+# of the source code distribution tree; Copyright.html can be found at the
+# root level of an installed copy of the electronic document set and is
+# linked from the top-level documents page.  It can also be found at
+# http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have access
+# to either file, you may request a copy from help@hdfgroup.org.
+#
+srcdir=@srcdir@
+TOP_BUILDDIR=@top_builddir@
+
+# Determine backward compatibility options enabled
+DEPRECATED_SYMBOLS="@DEPRECATED_SYMBOLS@"
+
+EXIT_SUCCESS=0
+EXIT_FAILURE=1
+
+H5LS=h5ls               # The tool name
+H5LS_BIN=`pwd`/$H5LS    # The path of the tool binary
+
+nerrors=0
+verbose=yes
+h5haveexitcode=yes      # default is yes
+
+TEST_NAME=ud_plugin
+FROM_DIR=`pwd`/.libs
+PLUGIN_LIB="$FROM_DIR/libdynlibls.*"
+PLUGIN_LIBDIR=testdir3
+
+RM='rm -rf'
+GREP='grep'
+CMP='cmp -s'
+DIFF='diff -c'
+CP='cp'
+DIRNAME='dirname'
+LS='ls'
+AWK='awk'
+
+# source dirs
+SRC_TOOLS="$srcdir/.."
+
+# testfiles source dirs for tools
+SRC_TOOLS_TESTFILES="$SRC_TOOLS/testfiles"
+SRC_H5LS_TESTFILES="$SRC_TOOLS_TESTFILES"
+
+TESTDIR=./testplug
+test -d $TESTDIR || mkdir $TESTDIR
+
+######################################################################
+# test files
+# --------------------------------------------------------------------
+# All the test files copy from source directory to test directory
+# NOTE: Keep this framework to add/remove test files.
+#       Any test files from other tools can be used in this framework.
+#       This list are also used for checking exist.
+#       Comment '#' without space can be used.
+# --------------------------------------------------------------------
+LIST_HDF5_TEST_FILES="
+$SRC_TOOLS_TESTFILES/tudfilter.h5
+$SRC_TOOLS_TESTFILES/tudfilter.ls
+"
+
+# RUNSERIAL is used. Check if it can return exit code from executable correctly.
+if [ -n "$RUNSERIAL_NOEXITCODE" ]; then
+    echo "***Warning*** Serial Exit Code is not passed back to shell correctly."
+    echo "***Warning*** Exit code checking is skipped."
+    h5haveexitcode=no
+fi
+
+# Main Body
+# Create test directories if not exists yet.
+test -d $PLUGIN_LIBDIR || mkdir -p $PLUGIN_LIBDIR
+if [ $? != 0 ]; then
+    echo "Failed to create test directory($PLUGIN_LIBDIR)"
+    exit $EXIT_FAILURE
+fi
+
+# copy plugin library for test
+$CP $PLUGIN_LIB $PLUGIN_LIBDIR
+if [ $? != 0 ]; then
+    echo "Failed to copy plugin library ($PLUGIN_LIB) for test."
+    exit $EXIT_FAILURE
+fi
+
+# setup plugin path
+ENVCMD="env HDF5_PLUGIN_PATH=../${PLUGIN_LIBDIR}"
+
+#
+# copy test files and expected output files from source dirs to test dir
+#
+COPY_TESTFILES="$LIST_HDF5_TEST_FILES"
+
+COPY_TESTFILES_TO_TESTDIR()
+{
+    # copy test files. Used -f to make sure get a new copy
+    for tstfile in $COPY_TESTFILES
+    do
+        # ignore '#' comment
+        echo $tstfile | tr -d ' ' | grep '^#' > /dev/null
+        RET=$?
+        if [ $RET -eq 1 ]; then
+            # skip cp if srcdir is same as destdir
+            # this occurs when build/test performed in source dir and
+            # make cp fail
+            SDIR=`$DIRNAME $tstfile`
+            INODE_SDIR=`$LS -i -d $SDIR | $AWK -F' ' '{print $1}'`
+            INODE_DDIR=`$LS -i -d $TESTDIR | $AWK -F' ' '{print $1}'`
+            if [ "$INODE_SDIR" != "$INODE_DDIR" ]; then
+                $CP -f $tstfile $TESTDIR
+                if [ $? -ne 0 ]; then
+                    echo "Error: FAILED to copy $tstfile ."
+
+                    # Comment out this to CREATE expected file
+                    exit $EXIT_FAILURE
+                fi
+            fi
+        fi
+    done
+}
+
+CLEAN_TESTFILES_AND_TESTDIR()
+{
+    # skip rm if srcdir is same as destdir
+    # this occurs when build/test performed in source dir and
+    # make cp fail
+    SDIR=$SRC_H5LS_TESTFILES
+    INODE_SDIR=`$LS -i -d $SDIR | $AWK -F' ' '{print $1}'`
+    INODE_DDIR=`$LS -i -d $TESTDIR | $AWK -F' ' '{print $1}'`
+    if [ "$INODE_SDIR" != "$INODE_DDIR" ]; then
+        $RM $TESTDIR
+    fi
+}
+
+# Print a line-line message left justified in a field of 70 characters
+# beginning with the word "Testing".
+#
+TESTING() {
+    SPACES="                                                               "
+    echo "Testing $* $SPACES" |cut -c1-70 |tr -d '\012'
+}
+
+# Source in the output filter function definitions.
+. $srcdir/../../bin/output_filter.sh
+
+# Run a test and print PASS or *FAIL*. For now, if h5ls can complete
+# with exit status 0, consider it pass. If a test fails then increment
+# the `nerrors' global variable and (if $verbose is set) display up to $NLINS
+# lines of the actual output from the tool test.  The actual output is not
+# removed if $HDF5_NOCLEANUP has a non-zero value.
+# Arguemnts:
+# $1 -- actual output filename to use
+# $2 and on -- argument for the h5ls tool
+TOOLTEST() {
+    expect="$TESTDIR/$1"
+    actual="$TESTDIR/`basename $1 .ls`.out"
+    actual_err="$TESTDIR/`basename $1 .ls`.err"
+    actual_sav=${actual}-sav
+    actual_err_sav=${actual_err}-sav
+    shift
+    retvalexpect=$1
+    shift
+
+    # Run test.
+    # Stderr is included in stdout so that the diff can detect
+    # any unexpected output from that stream too.
+    TESTING $H5LS $@
+    (
+    cd $TESTDIR
+        $ENVCMD $RUNSERIAL $H5LS_BIN "$@"
+    ) >$actual 2>$actual_err
+
+    exitcode=$?
+    # save actual and actual_err in case they are needed later.
+    cp $actual $actual_sav
+    STDOUT_FILTER $actual
+    cp $actual_err $actual_err_sav
+    STDERR_FILTER $actual_err
+    cat $actual_err >> $actual
+    if [ $h5haveexitcode = 'yes' -a $exitcode -ne $retvalexpect ]; then
+    echo "*FAILED*"
+    nerrors="`expr $nerrors + 1`"
+    if [ yes = "$verbose" ]; then
+        echo "test returned with exit code $exitcode"
+        echo "test output: (up to $NLINES lines)"
+        head -$NLINES $actual
+        echo "***end of test output***"
+        echo ""
+    fi
+    elif [ ! -f $expect ]; then
+    # Create the expect file if it doesn't yet exist.
+        echo " CREATED"
+        cp $actual $expect
+    elif $CMP $expect $actual; then
+        echo " PASSED"
+    else
+        echo "*FAILED*"
+    echo "    Expected result differs from actual result"
+    nerrors="`expr $nerrors + 1`"
+    test yes = "$verbose" && $DIFF $expect $actual |sed 's/^/    /'
+    fi
+
+    # Clean up output file
+    if test -z "$HDF5_NOCLEANUP"; then
+    rm -f $actual $actual_err $actual_sav $actual_err_sav
+    fi
+}
+
+##############################################################################
+###           T H E   T E S T S
+##############################################################################
+# prepare for test
+COPY_TESTFILES_TO_TESTDIR
+
+# Run the test
+TOOLTEST tudfilter.ls 0 -w80 -v -d tudfilter.h5
+
+# print results
+if test $nerrors -ne 0 ; then
+    echo "$nerrors errors encountered"
+    exit_code=$EXIT_FAILURE
+else
+    echo "All Plugin API tests passed."
+    exit_code=$EXIT_SUCCESS
+fi
+
+# Clean up temporary files/directories
+CLEAN_TESTFILES_AND_TESTDIR
+
+# Clean up temporary files/directories and leave
+$RM $PLUGIN_LIBDIR
+
+exit $exit_code
diff --git a/tools/h5ls/testh5ls.sh.in b/tools/h5ls/testh5ls.sh.in
index bf40bfa..4e138e1 100644
--- a/tools/h5ls/testh5ls.sh.in
+++ b/tools/h5ls/testh5ls.sh.in
@@ -17,6 +17,9 @@
 
 srcdir=@srcdir@
 
+USE_FILTER_SZIP="@USE_FILTER_SZIP@"
+USE_FILTER_DEFLATE="@USE_FILTER_DEFLATE@"
+
 TESTNAME=h5ls
 EXIT_SUCCESS=0
 EXIT_FAILURE=1
@@ -178,10 +181,10 @@ COPY_TESTFILES_TO_TESTDIR()
             INODE_SDIR=`$LS -i -d $SDIR | $AWK -F' ' '{print $1}'`
             INODE_DDIR=`$LS -i -d $TESTDIR | $AWK -F' ' '{print $1}'`
             if [ "$INODE_SDIR" != "$INODE_DDIR" ]; then
-    	        $CP -f $tstfile $TESTDIR
+                $CP -f $tstfile $TESTDIR
                 if [ $? -ne 0 ]; then
                     echo "Error: FAILED to copy $tstfile ."
-                
+
                     # Comment out this to CREATE expected file
                     exit $EXIT_FAILURE
                 fi
@@ -195,7 +198,7 @@ CLEAN_TESTFILES_AND_TESTDIR()
     # skip rm if srcdir is same as destdir
     # this occurs when build/test performed in source dir and
     # make cp fail
-    SDIR=`$DIRNAME $tstfile`
+    SDIR=$SRC_H5LS_TESTFILES
     INODE_SDIR=`$LS -i -d $SDIR | $AWK -F' ' '{print $1}'`
     INODE_DDIR=`$LS -i -d $TESTDIR | $AWK -F' ' '{print $1}'`
     if [ "$INODE_SDIR" != "$INODE_DDIR" ]; then
@@ -236,10 +239,10 @@ TOOLTEST() {
     # any unexpected output from that stream too.
     TESTING $H5LS $@
     (
-	cd $TESTDIR
+    cd $TESTDIR
         $RUNSERIAL $H5LS_BIN "$@"
-    ) >$actual 2>$actual_err 
-    
+    ) >$actual 2>$actual_err
+
     exitcode=$?
     # save actual and actual_err in case they are needed later.
     cp $actual $actual_sav
@@ -248,37 +251,37 @@ TOOLTEST() {
     STDERR_FILTER $actual_err
     cat $actual_err >> $actual
     if [ $h5haveexitcode = 'yes' -a $exitcode -ne $retvalexpect ]; then
-	echo "*FAILED*"
-	nerrors="`expr $nerrors + 1`"
-	if [ yes = "$verbose" ]; then
-	    echo "test returned with exit code $exitcode"
-	    echo "test output: (up to $NLINES lines)"
-	    head -$NLINES $actual
-	    echo "***end of test output***"
-	    echo ""
-	fi
+    echo "*FAILED*"
+    nerrors="`expr $nerrors + 1`"
+    if [ yes = "$verbose" ]; then
+        echo "test returned with exit code $exitcode"
+        echo "test output: (up to $NLINES lines)"
+        head -$NLINES $actual
+        echo "***end of test output***"
+        echo ""
+    fi
     elif [ ! -f $expect ]; then
-	# Create the expect file if it doesn't yet exist.
+    # Create the expect file if it doesn't yet exist.
         echo " CREATED"
         cp $actual $expect
     elif $CMP $expect $actual; then
         echo " PASSED"
     else
         echo "*FAILED*"
-	echo "    Expected result differs from actual result"
-	nerrors="`expr $nerrors + 1`"
-	test yes = "$verbose" && $DIFF $expect $actual |sed 's/^/    /'
+    echo "    Expected result differs from actual result"
+    nerrors="`expr $nerrors + 1`"
+    test yes = "$verbose" && $DIFF $expect $actual |sed 's/^/    /'
     fi
 
     # Clean up output file
     if test -z "$HDF5_NOCLEANUP"; then
-	rm -f $actual $actual_err $actual_sav $actual_err_sav
+    rm -f $actual $actual_err $actual_sav $actual_err_sav
     fi
 }
 
 ##############################################################################
 ##############################################################################
-###			  T H E   T E S T S                                ###
+###              T H E   T E S T S                                ###
 ##############################################################################
 ##############################################################################
 # prepare for test
@@ -337,7 +340,7 @@ TOOLTEST textlinksrc-3-old.ls 0 -w80 -Er textlinksrc.h5/ext_link1
 TOOLTEST textlinksrc-6-old.ls 0 -w80 -E textlinksrc.h5
 TOOLTEST textlinksrc-7-old.ls 0 -w80 -E textlinksrc.h5/ext_link1
 
-# tests for no-dangling-links 
+# tests for no-dangling-links
 # if this option is given on dangling link, h5ls should return exit code 1
 # when used alone , expect to print out help and return exit code 1
 TOOLTEST textlinksrc-nodangle-1.ls 1 -w80 --no-dangling-links textlinksrc.h5
@@ -372,7 +375,7 @@ TOOLTEST tnestcomp-4.ls 0 -w80 -r -d -l -S tnestedcomp.h5
 # test for loop detection
 TOOLTEST tloop-1.ls 0 -w80 -r -d tloop.h5
 
-# test for string 
+# test for string
 TOOLTEST tstr-1.ls 0 -w80 -r -d tstr.h5
 
 # test test file created from lib SAF team
@@ -403,15 +406,15 @@ fi
 # test for non-existing file
 TOOLTEST nosuchfile.ls 1 nosuchfile.h5
 
-# test for variable length data types in verbose mode 
+# test for variable length data types in verbose mode
 if test $WORDS_BIGENDIAN != "yes"; then
  TOOLTEST tvldtypes2le.ls 0 -v tvldtypes1.h5
 else
  TOOLTEST tvldtypes2be.ls 0 -v tvldtypes1.h5
-fi 
+fi
 
 
-# test for dataset region references data types in verbose mode 
+# test for dataset region references data types in verbose mode
 if test $WORDS_BIGENDIAN != "yes"; then
  TOOLTEST tdataregle.ls 0 -v tdatareg.h5
 else
diff --git a/tools/lib/h5diff.c b/tools/lib/h5diff.c
index 2eb66f9..d7f5cb5 100644
--- a/tools/lib/h5diff.c
+++ b/tools/lib/h5diff.c
@@ -479,7 +479,7 @@ static herr_t trav_grp_symlinks(const char *path, const H5L_info_t *linfo,
                 tinfo->symlink_visited.dangle_link = TRUE;
                 trav_info_visit_lnk(path, linfo, tinfo);
                 if (opts->no_dangle_links)
-                    opts->err_stat = 1; /* make dgangling link is error */
+                    opts->err_stat = 1; /* make dangling link is error */
                 goto done;
             }
 
@@ -511,7 +511,7 @@ static herr_t trav_grp_symlinks(const char *path, const H5L_info_t *linfo,
                 tinfo->symlink_visited.dangle_link = TRUE;
                 trav_info_visit_lnk(path, linfo, tinfo);
                 if (opts->no_dangle_links)
-                    opts->err_stat = 1; /* make dgangling link is error */
+                    opts->err_stat = 1; /* make dangling link is error */
                 goto done;
             }
 
@@ -592,8 +592,8 @@ hsize_t h5diff(const char *fname1,
     trav_info_t  *info1_grp = NULL;
     trav_info_t  *info2_grp = NULL;
     /* local pointer */
-    trav_info_t  *info1_lp;
-    trav_info_t  *info2_lp;
+    trav_info_t  *info1_lp = NULL;
+    trav_info_t  *info2_lp = NULL;
     /* link info from specified object */
     H5L_info_t src_linfo1;
     H5L_info_t src_linfo2;
@@ -1555,7 +1555,7 @@ hsize_t diff(hid_t file1_id,
         {
             if (options->no_dangle_links)
             {
-                /* gangling link is error */
+                /* dangling link is error */
                 if(options->m_verbose)
                     parallel_print("Warning: <%s> is a dangling link.\n", path1);
                 goto out;
@@ -1573,7 +1573,7 @@ hsize_t diff(hid_t file1_id,
         {
             if (options->no_dangle_links)
             {
-                /* gangling link is error */
+                /* dangling link is error */
                 if(options->m_verbose)
                     parallel_print("Warning: <%s> is a dangling link.\n", path2);
                 goto out;
diff --git a/tools/lib/h5diff_dset.c b/tools/lib/h5diff_dset.c
index 157978d..17eeafe 100644
--- a/tools/lib/h5diff_dset.c
+++ b/tools/lib/h5diff_dset.c
@@ -71,9 +71,7 @@ hsize_t diff_dataset( hid_t file1_id,
     if((dcpl1 = H5Dget_create_plist(did1)) < 0)
         goto error;
     if((dcpl2 = H5Dget_create_plist(did2)) < 0)
-    {
         goto error;
-    }
 
     /*-------------------------------------------------------------------------
     * check if the dataset creation property list has filters that
@@ -91,6 +89,9 @@ hsize_t diff_dataset( hid_t file1_id,
             obj2_name,
             options);
     }
+    else
+        goto error;
+
     /*-------------------------------------------------------------------------
     * close
     *-------------------------------------------------------------------------
@@ -324,7 +325,7 @@ hsize_t diff_datasetid( hid_t did1,
                 parallel_print("Not comparable: <%s> has sign %s ", obj1_name, get_sign(sign1));
                 parallel_print("and <%s> has sign %s\n", obj2_name, get_sign(sign2));
             }
-    
+
             can_compare=0;
             options->not_cmp=1;
         }
@@ -676,31 +677,30 @@ int diff_can_type( hid_t       f_tid1, /* file data type */
     HDassert(tclass1==tclass2);
     switch (tclass1)
     {
-    case H5T_INTEGER:
-    case H5T_FLOAT:
-    case H5T_COMPOUND:
-    case H5T_STRING:
-    case H5T_ARRAY:
-    case H5T_BITFIELD:
-    case H5T_OPAQUE:
-    case H5T_ENUM:
-    case H5T_VLEN:
-    case H5T_REFERENCE:
-
-        break;
-
-    default: /*H5T_TIME */
-
+        case H5T_TIME:
+            if ( (options->m_verbose||options->m_list_not_cmp) && obj1_name && obj2_name) {
+                parallel_print("Not comparable: <%s> and <%s> are of class %s\n",
+                    obj1_name,obj2_name,get_class(tclass2) );
+            } /* end if */
+            can_compare = 0;
+            options->not_cmp = 1;
+            return can_compare;
 
-        if ( (options->m_verbose||options->m_list_not_cmp) && obj1_name && obj2_name)
-        {
-            parallel_print("Not comparable: <%s> and <%s> are of class %s\n",
-                obj1_name,obj2_name,get_class(tclass2) );
-        }
-        can_compare = 0;
-        options->not_cmp = 1;
-        return can_compare;
-    }
+        case H5T_INTEGER:
+        case H5T_FLOAT:
+        case H5T_COMPOUND:
+        case H5T_STRING:
+        case H5T_ARRAY:
+        case H5T_BITFIELD:
+        case H5T_OPAQUE:
+        case H5T_ENUM:
+        case H5T_VLEN:
+        case H5T_REFERENCE:
+        case H5T_NO_CLASS:
+        case H5T_NCLASSES:
+        default:
+            break;
+    } /* end switch */
 
     /*-------------------------------------------------------------------------
     * check for equal file datatype; warning only
diff --git a/tools/lib/h5tools_dump.c b/tools/lib/h5tools_dump.c
index 3928837..665c2e8 100644
--- a/tools/lib/h5tools_dump.c
+++ b/tools/lib/h5tools_dump.c
@@ -3156,7 +3156,6 @@ h5tools_dump_dcpl(FILE *stream, const h5tool_format_t *info,
                     h5tools_render_element(stream, info, ctx, &buffer, &curr_pos, (size_t)ncols, (hsize_t)0, (hsize_t)0);
                     break;
                 case H5Z_FILTER_SZIP:
-                    {
                         szip_options_mask = cd_values[0];;
                         szip_pixels_per_block = cd_values[1];
 
@@ -3219,7 +3218,6 @@ h5tools_dump_dcpl(FILE *stream, const h5tool_format_t *info,
                         h5tools_str_reset(&buffer);
                         h5tools_str_append(&buffer, "%s", END);
                         h5tools_render_element(stream, info, ctx, &buffer, &curr_pos, (size_t)ncols, (hsize_t)0, (hsize_t)0);
-                    }
                     break;
                 case H5Z_FILTER_NBIT:
                     h5tools_str_append(&buffer, "%s", NBIT);
@@ -3389,6 +3387,8 @@ h5tools_dump_dcpl(FILE *stream, const h5tool_format_t *info,
         case H5D_ALLOC_TIME_LATE:
             h5tools_str_append(&buffer, "%s", "H5D_ALLOC_TIME_LATE");
             break;
+            case H5D_ALLOC_TIME_ERROR:
+            case H5D_ALLOC_TIME_DEFAULT:
         default:
             HDassert(0);
             break;
diff --git a/tools/lib/h5tools_str.c b/tools/lib/h5tools_str.c
index 7f65c91..e62c7b0 100644
--- a/tools/lib/h5tools_str.c
+++ b/tools/lib/h5tools_str.c
@@ -736,7 +736,7 @@ h5tools_str_sprint(h5tools_str_t *str, const h5tool_format_t *info, hid_t contai
                     long double templdouble;
 
                     HDmemcpy(&templdouble, vp, sizeof(long double));
-                    h5tools_str_append(str, "%Lf", templdouble);
+                    h5tools_str_append(str, OPT(info->fmt_double, "%Lf"), templdouble);
 #endif
                 }
                 break;
diff --git a/tools/testfiles/tudfilter.ddl b/tools/testfiles/tudfilter.ddl
new file mode 100644
index 0000000..5bdceec
--- /dev/null
+++ b/tools/testfiles/tudfilter.ddl
@@ -0,0 +1,30 @@
+HDF5 "tudfilter.h5" {
+GROUP "/" {
+   DATASET "dynlib2" {
+      DATATYPE  H5T_STD_I32LE
+      DATASPACE  SIMPLE { ( 20, 10 ) / ( 20, 10 ) }
+      DATA {
+      (0,0): 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
+      (1,0): 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
+      (2,0): 20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
+      (3,0): 30, 31, 32, 33, 34, 35, 36, 37, 38, 39,
+      (4,0): 40, 41, 42, 43, 44, 45, 46, 47, 48, 49,
+      (5,0): 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,
+      (6,0): 60, 61, 62, 63, 64, 65, 66, 67, 68, 69,
+      (7,0): 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
+      (8,0): 80, 81, 82, 83, 84, 85, 86, 87, 88, 89,
+      (9,0): 90, 91, 92, 93, 94, 95, 96, 97, 98, 99,
+      (10,0): 100, 101, 102, 103, 104, 105, 106, 107, 108, 109,
+      (11,0): 110, 111, 112, 113, 114, 115, 116, 117, 118, 119,
+      (12,0): 120, 121, 122, 123, 124, 125, 126, 127, 128, 129,
+      (13,0): 130, 131, 132, 133, 134, 135, 136, 137, 138, 139,
+      (14,0): 140, 141, 142, 143, 144, 145, 146, 147, 148, 149,
+      (15,0): 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
+      (16,0): 160, 161, 162, 163, 164, 165, 166, 167, 168, 169,
+      (17,0): 170, 171, 172, 173, 174, 175, 176, 177, 178, 179,
+      (18,0): 180, 181, 182, 183, 184, 185, 186, 187, 188, 189,
+      (19,0): 190, 191, 192, 193, 194, 195, 196, 197, 198, 199
+      }
+   }
+}
+}
diff --git a/tools/testfiles/tudfilter.h5 b/tools/testfiles/tudfilter.h5
new file mode 100644
index 0000000..a1f6d80
--- /dev/null
+++ b/tools/testfiles/tudfilter.h5
diff --git a/tools/testfiles/tudfilter.ls b/tools/testfiles/tudfilter.ls
new file mode 100644
index 0000000..7ca8682
--- /dev/null
+++ b/tools/testfiles/tudfilter.ls
@@ -0,0 +1,23 @@
+Opened "tudfilter.h5" with sec2 driver.
+dynlib2                  Dataset {20/20, 10/10}
+    Location:  1:800
+    Links:     1
+    Chunks:    {10, 5} 200 bytes
+    Storage:   800 logical bytes, 800 allocated bytes, 100.00% utilization
+    Filter-0:  dynlib2-258  {}
+    Type:      native int
+    Data:
+        (0,0) 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
+        (1,9) 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34,
+        (3,5) 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50,
+        (5,1) 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66,
+        (6,7) 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82,
+        (8,3) 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98,
+        (9,9) 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
+        (11,2) 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124,
+        (12,5) 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137,
+        (13,8) 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150,
+        (15,1) 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163,
+        (16,4) 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176,
+        (17,7) 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189,
+        (19,0) 190, 191, 192, 193, 194, 195, 196, 197, 198, 199