Merge pull request #8 in ~VCHOI/my_third_fork from develop to bugfix/new_shutdown_fsm

* commit '35fd0ec8ceffe96cee352187154da15c967fb990':
  Updated H5Tcopy() to get the dataset's datatype through the VOL when that is passed in as the object ID.
  Fix fortran test and test library linking
  Update GCC 6 & 7 flags for CMake builds
  Move -Wnormalized down into GCC 6.x flags
  Put the memcpy overlap check back into H5MM.
  Fixed the heap overflow in t_filters_parallel
  Fixed some low-hanging fruit from -fsanitize in t_filters_parallel.
  Add lib dir for testing plugins
  Add support for GCC 7.x warnings, update warnhist script to account for them, clean up warnings.
  Add H5_HLDLL prefix for windows link
  HDFFV-10805 cleanup examples and test code
  Fix minor typo in H5S_select_iter_release
  Add missing fortran mods
  HDFFV-10805 Fix test of library libinfo
  Cleanup possible CMake target conflicts
  Correct CMake issues

91 files changed, 477 insertions, 338 deletions

diff --git a/bin/warnhist b/bin/warnhist
index 6b7ef73..5750c77 100755
--- a/bin/warnhist
+++ b/bin/warnhist
@@ -155,6 +155,7 @@ while (<>) {
     my $toss;
     my $offset;
     my $warning;
+    my $extra;
 
     # Retain last FORTRAN compile line, which comes a few lines before warning
     if($_ =~ /.*\.[fF]90:.*/) {
@@ -176,12 +177,12 @@ while (<>) {
     if($_ =~ /^cc1: warning:.*/) {
         $name = $last_c_name;
         $line = "??";
-        ($toss, $toss, $warning) = split /\:/, $_;
+        ($toss, $toss, $warning, $extra) = split /\:/, $_;
     # Check for FORTRAN warning output
     } elsif($_ =~ /^Warning:.*/) {
         $name = $last_fort_name;
         $line = $last_fort_line;
-        ($toss, $warning) = split /\:/, $_;
+        ($toss, $warning, $extra) = split /\:/, $_;
 #print "1:",$.,":",$_;
 #        $_ = <>;
 #print "2:",$.,":",$_;
@@ -203,12 +204,19 @@ while (<>) {
     } else {
         # Check for 'character offset' field
         if($_ =~ /^.*[0-9]+\:[0-9]+\:/) {
-            ($name, $line, $offset, $toss, $warning) = split /\:/, $_;
+            ($name, $line, $offset, $toss, $warning, $extra) = split /\:/, $_;
         } else {
-            ($name, $line, $toss, $warning) = split /\:/, $_;
+            ($name, $line, $toss, $warning, $extra) = split /\:/, $_;
         }
     }
 
+    # Check for extra ':' followed by more text in original warning string,
+    #  and append the ':' and text back onto the parsed warning
+    #  (Use 'length $extra' idiom to avoid warning when $extra is undefined)
+    if(length $extra ) {
+        $warning = join ':', $warning, $extra;
+    }
+
     # Trim leading '..' paths from filename
     while($name =~ /^\.\.\//) {
         $name =~ s/^\.\.\///g;
@@ -401,6 +409,28 @@ while (<>) {
     } elsif($warning =~ /function might be candidate for attribute '[A-Za-z_0-9]*' \[-Wsuggest-attribute=[A-Za-z_0-9]*\].*/) {
         $warning =~ s/'[A-Za-z_0-9]*'/'-'/g;
         $warning =~ s/=[A-Za-z_0-9]*\]/=-\]/g;
+    } elsif($warning =~ /passing argument [0-9]+ of '[A-Za-z_0-9]*' makes integer from pointer without a cast \[-Wint-conversion\].*/) {
+        $warning =~ s/'[A-Za-z_0-9]*'/'-'/g;
+        $warning =~ s/[0-9]+/-/g;
+    } elsif($warning =~ /function '[A-Za-z_0-9]*' might be a candidate for '[A-Za-z_0-9]*' format attribute \[-Wsuggest-attribute=format\].*/) {
+        $warning =~ s/'[A-Za-z_0-9]*'/'-'/g;
+    } elsif($warning =~ /inlining failed in call to '[A-Za-z_0-9]*': call is unlikely and code size would grow \[-Winline\].*/) {
+        $warning =~ s/'[A-Za-z_0-9]*'/'-'/g;
+    } elsif($warning =~ /'%[0-9]*[\.\*]*[0-9]*[dfsu]' directive writing between [0-9]+ and [0-9]+ bytes into a region of size [0-9]+ \[-Wformat-overflow=\].*/) {
+        $warning =~ s/'%[0-9]*[\.\*]*[0-9]*[dfsu]'/'-'/g;
+        $warning =~ s/[0-9]+/-/g;
+    } elsif($warning =~ /'%[0-9]*[\.\*]*[0-9]*[dfsu]' directive writing between [0-9]+ and [0-9]+ bytes into a region of size between [0-9]+ and [0-9]+ \[-Wformat-overflow=\].*/) {
+        $warning =~ s/'%[0-9]*[\.\*]*[0-9]*[dfsu]'/'-'/g;
+        $warning =~ s/[0-9]+/-/g;
+    } elsif($warning =~ /'%[0-9]*[\.\*]*[0-9]*[dfsu]' directive output may be truncated writing between [0-9]+ and [0-9]+ bytes into a region of size [0-9]+ \[-Wformat-truncation=\].*/) {
+        $warning =~ s/'%[0-9]*[\.\*]*[0-9]*[dfsu]'/'-'/g;
+        $warning =~ s/[0-9]+/-/g;
+    } elsif($warning =~ /'%[0-9]*[\.\*]*[0-9]*[dfsu]' directive output may be truncated writing up to [0-9]+ bytes into a region of size [0-9]+ \[-Wformat-truncation=\].*/) {
+        $warning =~ s/'%[0-9]*[\.\*]*[0-9]*[dfsu]'/'-'/g;
+        $warning =~ s/[0-9]+/-/g;
+    } elsif($warning =~ /'%[0-9]*[\.\*]*[0-9]*[dfsu]' directive output may be truncated writing between [0-9]+ and [0-9]+ bytes into a region of size between [0-9]+ and [0-9]+ \[-Wformat-truncation=\].*/) {
+        $warning =~ s/'%[0-9]*[\.\*]*[0-9]*[dfsu]'/'-'/g;
+        $warning =~ s/[0-9]+/-/g;
     }
 
     # Increment count for [generic] warning
diff --git a/config/cmake/HDFCompilerFlags.cmake b/config/cmake/HDFCompilerFlags.cmake
index 0a39568..4712f50 100644
--- a/config/cmake/HDFCompilerFlags.cmake
+++ b/config/cmake/HDFCompilerFlags.cmake
@@ -195,7 +195,12 @@ if (NOT MSVC AND CMAKE_COMPILER_IS_GNUCC)
 
     # Append more extra warning flags that only gcc 6.x+ know about
     if (CMAKE_C_COMPILER_ID STREQUAL "GNU" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 6.0)
-      set (H5_CFLAGS4 "${H5_CFLAGS4} -Wnull-dereference -Wunused-const-variable -Wduplicated-cond -Whsa")
+      set (H5_CFLAGS4 "${H5_CFLAGS4} -Wnull-dereference -Wunused-const-variable -Wduplicated-cond -Whsa -Wnormalized")
+    endif ()
+
+    # Append more extra warning flags that only gcc 7.x+ know about
+    if (CMAKE_C_COMPILER_ID STREQUAL "GNU" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 7.0)
+      set (H5_CFLAGS4 "${H5_CFLAGS4} -Walloc-zero -Walloca -Wduplicated-branches -Wformat-overflow=2 -Wformat-truncation=2 -Wimplicit-fallthrough=5 -Wrestrict")
     endif ()
 
 endif ()
diff --git a/config/cmake/jrunTest.cmake b/config/cmake/jrunTest.cmake
index fc49275..44ac15b 100644
--- a/config/cmake/jrunTest.cmake
+++ b/config/cmake/jrunTest.cmake
@@ -9,7 +9,7 @@
 # If you do not have access to either file, you may request a copy from
 # help@hdfgroup.org.
 #
-# runTest.cmake executes a command and captures the output in a file. File is then compared
+# jrunTest.cmake executes a command and captures the output in a file. File is then compared
 # against a reference file. Exit status of command can also be compared.
 cmake_policy(SET CMP0007 NEW)
 
diff --git a/config/cmake_ext_mod/ConfigureChecks.cmake b/config/cmake_ext_mod/ConfigureChecks.cmake
index bbd5170..63d9ee9 100644
--- a/config/cmake_ext_mod/ConfigureChecks.cmake
+++ b/config/cmake_ext_mod/ConfigureChecks.cmake
@@ -28,7 +28,7 @@ if (APPLE)
   list (LENGTH CMAKE_OSX_ARCHITECTURES ARCH_LENGTH)
   if (ARCH_LENGTH GREATER 1)
     set (CMAKE_OSX_ARCHITECTURES "" CACHE STRING "" FORCE)
-    message(FATAL_ERROR "Building Universal Binaries on OS X is NOT supported by the HDF5 project. This is"
+    message (FATAL_ERROR "Building Universal Binaries on OS X is NOT supported by the HDF5 project. This is"
     "due to technical reasons. The best approach would be build each architecture in separate directories"
     "and use the 'lipo' tool to combine them into a single executable or library. The 'CMAKE_OSX_ARCHITECTURES'"
     "variable has been set to a blank value which will build the default architecture for this system.")
diff --git a/config/cmake_ext_mod/FindSZIP.cmake b/config/cmake_ext_mod/FindSZIP.cmake
index 97a2336..152f8ac 100644
--- a/config/cmake_ext_mod/FindSZIP.cmake
+++ b/config/cmake_ext_mod/FindSZIP.cmake
@@ -27,7 +27,7 @@
 # Result variables
 ###################
 
-This module will set the following variables in your project:
+# This module will set the following variables in your project:
 
 #  SZIP_FOUND, true if the SZIP headers and libraries were found.
 #  SZIP_INCLUDE_DIR, the directory containing the SZIP headers.
diff --git a/config/cmake_ext_mod/HDFMacros.cmake b/config/cmake_ext_mod/HDFMacros.cmake
index e971224..9da5006 100644
--- a/config/cmake_ext_mod/HDFMacros.cmake
+++ b/config/cmake_ext_mod/HDFMacros.cmake
@@ -28,7 +28,7 @@ macro (SET_HDF_BUILD_TYPE)
     endif()
   endif()
   if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
-    message(STATUS "Setting build type to 'RelWithDebInfo' as none was specified.")
+    message (STATUS "Setting build type to 'RelWithDebInfo' as none was specified.")
     set(CMAKE_BUILD_TYPE RelWithDebInfo CACHE STRING "Choose the type of build." FORCE)
     # Set the possible values of build type for cmake-gui
     set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release"
@@ -224,10 +224,9 @@ macro (TARGET_C_PROPERTIES wintarget libtype)
       $<$<C_COMPILER_ID:MSVC>:${WIN_COMPILE_FLAGS}>
       $<$<CXX_COMPILER_ID:MSVC>:${WIN_COMPILE_FLAGS}>
   )
-  target_link_libraries(${wintarget} INTERFACE
-      $<$<C_COMPILER_ID:MSVC>:${WIN_LINK_FLAGS}>
-      $<$<CXX_COMPILER_ID:MSVC>:${WIN_LINK_FLAGS}>
-  )
+  if(MSVC)
+    set_property(TARGET ${wintarget} APPEND PROPERTY LINK_FLAGS "${WIN_LINK_FLAGS}")
+  endif()
 endmacro ()
 
 #-----------------------------------------------------------------------------
diff --git a/config/gnu-flags b/config/gnu-flags
index 7df72c7..c55391d 100644
--- a/config/gnu-flags
+++ b/config/gnu-flags
@@ -117,7 +117,7 @@ case "$cc_vendor-$cc_version" in
     H5_CFLAGS="$H5_CFLAGS -Wcast-qual -Wconversion -Wdeclaration-after-statement -Wdisabled-optimization -Wfloat-equal"
     H5_CFLAGS="$H5_CFLAGS -Wformat=2 -Winit-self -Winvalid-pch -Wmissing-declarations -Wmissing-include-dirs"
     H5_CFLAGS="$H5_CFLAGS -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wpacked -Wpointer-arith"
-    H5_CFLAGS="$H5_CFLAGS -Wredundant-decls -Wshadow -Wstrict-prototypes -Wswitch-default -Wswitch-enum"
+    H5_CFLAGS="$H5_CFLAGS -Wredundant-decls -Wshadow -Wstrict-prototypes -Wswitch-enum -Wswitch-default"
     H5_CFLAGS="$H5_CFLAGS -Wundef -Wunused-macros -Wunsafe-loop-optimizations -Wwrite-strings"
 
     # Production
@@ -187,10 +187,10 @@ esac
 # the information from the previous version and adding modifications to that.
 case "$cc_vendor-$cc_version" in
 
-# When the gcc 7.x release is out, we should check for additional flags to
+# When the gcc 8.x release is out, we should check for additional flags to
 # include and break it out into it's own section, like the other versions
 # below. -QAK
-  gcc-[6789].*)
+  gcc-[789].*)
     # Append warning flags that only gcc 4.2+ knows about
     # (none, or incorporated in -Wall / -Wextra now)
 
@@ -227,7 +227,51 @@ case "$cc_vendor-$cc_version" in
     H5_CFLAGS="$H5_CFLAGS -Warray-bounds=2 -Wc99-c11-compat"
 
     # Append warning flags that only gcc 6.x+ knows about
-    H5_CFLAGS="$H5_CFLAGS -Wnull-dereference -Wunused-const-variable -Wduplicated-cond -Whsa"
+    H5_CFLAGS="$H5_CFLAGS -Wnull-dereference -Wunused-const-variable -Wduplicated-cond -Whsa -Wnormalized"
+
+    # Append warning flags that only gcc 7.x+ knows about
+    DEVELOPER_WARNING_CFLAGS="$DEVELOPER_WARNING_CFLAGS -Wstringop-overflow=2"
+    H5_CFLAGS="$H5_CFLAGS -Walloc-zero -Walloca -Wduplicated-branches -Wformat-overflow=2 -Wformat-truncation=2 -Wimplicit-fallthrough=5 -Wrestrict"
+    ;;
+
+  gcc-6*)
+    # Append warning flags that only gcc 4.2+ knows about
+    # (none, or incorporated in -Wall / -Wextra now)
+
+    # Append warning flags that only gcc 4.3+ knows about
+    #
+    # Technically, variable-length arrays are part of the C99 standard, but
+    #   we should approach them a bit cautiously... -QAK
+    H5_CFLAGS="$H5_CFLAGS -Wlogical-op -Wlarger-than=2048 -Wvla"
+
+    # Append warning flags that only gcc 4.4+ knows about
+    H5_CFLAGS="$H5_CFLAGS -Wsync-nand -Wframe-larger-than=16384 -Wpacked-bitfield-compat"
+
+    # Append warning flags that only gcc 4.5+ knows about
+    H5_CFLAGS="$H5_CFLAGS -Wstrict-overflow=5 -Wjump-misses-init -Wunsuffixed-float-constants"
+
+    # Append warning flags that only gcc 4.6+ knows about
+    H5_CFLAGS="$H5_CFLAGS -Wdouble-promotion -Wtrampolines"
+    DEVELOPER_WARNING_CFLAGS="$DEVELOPER_WARNING_CFLAGS -Wsuggest-attribute=const"
+    NO_DEVELOPER_WARNING_CFLAGS="$NO_DEVELOPER_WARNING_CFLAGS -Wno-suggest-attribute=const"
+
+    # Append warning flags that only gcc 4.7+ knows about
+    H5_CFLAGS="$H5_CFLAGS -Wstack-usage=8192 -Wvector-operation-performance"
+    DEVELOPER_WARNING_CFLAGS="$DEVELOPER_WARNING_CFLAGS -Wsuggest-attribute=pure -Wsuggest-attribute=noreturn"
+    NO_DEVELOPER_WARNING_CFLAGS="$NO_DEVELOPER_WARNING_CFLAGS -Wno-suggest-attribute=pure -Wno-suggest-attribute=noreturn"
+
+    # Append warning flags that only gcc 4.8+ knows about
+    DEVELOPER_WARNING_CFLAGS="$DEVELOPER_WARNING_CFLAGS -Wsuggest-attribute=format"
+    NO_DEVELOPER_WARNING_CFLAGS="$NO_DEVELOPER_WARNING_CFLAGS -Wno-suggest-attribute=format"
+
+    # Append warning flags that only gcc 4.9+ knows about
+    H5_CFLAGS="$H5_CFLAGS -Wdate-time"
+
+    # Append warning flags that only gcc 5.x+ knows about
+    H5_CFLAGS="$H5_CFLAGS -Warray-bounds=2 -Wc99-c11-compat"
+
+    # Append warning flags that only gcc 6.x+ knows about
+    H5_CFLAGS="$H5_CFLAGS -Wnull-dereference -Wunused-const-variable -Wduplicated-cond -Whsa -Wnormalized"
     ;;
 
   gcc-5*)
diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 0c1157f..6e1f79d 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -49,7 +49,6 @@ foreach (example ${examples})
     TARGET_C_PROPERTIES (${example} SHARED)
     target_link_libraries (${example} PRIVATE ${HDF5_LIBSH_TARGET})
   endif ()
-    target_link_libraries (${example} PRIVATE ${HDF5_LIB_TARGET})
   set_target_properties (${example} PROPERTIES FOLDER examples)
 endforeach ()
 
diff --git a/fortran/src/CMakeLists.txt b/fortran/src/CMakeLists.txt
index 4e60361..b01e4d4 100644
--- a/fortran/src/CMakeLists.txt
+++ b/fortran/src/CMakeLists.txt
@@ -383,6 +383,7 @@ if (NOT ONLY_SHARED_LIBS)
       ${MOD_BUILD_DIR}/h5r.mod
       ${MOD_BUILD_DIR}/h5s.mod
       ${MOD_BUILD_DIR}/h5t.mod
+      ${MOD_BUILD_DIR}/h5vl.mod
       ${MOD_BUILD_DIR}/h5z.mod
       ${MOD_BUILD_DIR}/h5_gen.mod
   )
@@ -415,6 +416,7 @@ if (BUILD_SHARED_LIBS)
       ${MODSH_BUILD_DIR}/h5r.mod
       ${MODSH_BUILD_DIR}/h5s.mod
       ${MODSH_BUILD_DIR}/h5t.mod
+      ${MODSH_BUILD_DIR}/h5vl.mod
       ${MODSH_BUILD_DIR}/h5z.mod
       ${MODSH_BUILD_DIR}/h5_gen.mod
   )
diff --git a/fortran/src/H5Fff.F90 b/fortran/src/H5Fff.F90
index ac3a1c0..8574c06 100644
--- a/fortran/src/H5Fff.F90
+++ b/fortran/src/H5Fff.F90
@@ -591,7 +591,6 @@ CONTAINS
                                            ! is an HDF5 file
     INTEGER, INTENT(OUT) :: hdferr         ! Error code
 !*****
-    INTEGER(HID_T) :: access_prp_default
     CHARACTER(LEN=LEN_TRIM(name)+1,KIND=C_CHAR) :: c_name
     INTEGER(C_INT) :: flag    ! "TRUE/FALSE/ERROR" flag from C routine
                               ! to define status value.
diff --git a/fortran/src/H5VLff.F90 b/fortran/src/H5VLff.F90
index 9abc157..e21f38f 100644
--- a/fortran/src/H5VLff.F90
+++ b/fortran/src/H5VLff.F90
@@ -217,7 +217,6 @@ CONTAINS
 !*****
     CHARACTER(LEN=1,KIND=C_CHAR), DIMENSION(1:LEN(name)+1), TARGET :: c_name
     INTEGER(SIZE_T) :: l
-    TYPE(C_PTR) :: f_ptr
 
     INTERFACE
        INTEGER(SIZE_T) FUNCTION H5VLget_connector_name(obj_id, name, size) BIND(C,NAME='H5VLget_connector_name')
diff --git a/fortran/test/CMakeLists.txt b/fortran/test/CMakeLists.txt
index 3f049af..9c68860 100644
--- a/fortran/test/CMakeLists.txt
+++ b/fortran/test/CMakeLists.txt
@@ -31,13 +31,12 @@ set_target_properties (H5_test_buildiface PROPERTIES
     Fortran_MODULE_DIRECTORY ${CMAKE_Fortran_MODULE_DIRECTORY}
 )
 
-if (BUILD_SHARED_LIBS)
-  file (MAKE_DIRECTORY "${HDF5_FORTRAN_TESTS_BINARY_DIR}/shared")
-  set (MODSH_BUILD_DIR ${CMAKE_Fortran_MODULE_DIRECTORY}/shared/${HDF_CFG_BUILD_TYPE})
-endif ()
-if (NOT ONLY_SHARED_LIBS)
+if (NOT BUILD_SHARED_LIBS)
   file (MAKE_DIRECTORY "${HDF5_FORTRAN_TESTS_BINARY_DIR}/static")
   set (MOD_BUILD_DIR ${CMAKE_Fortran_MODULE_DIRECTORY}/static/${HDF_CFG_BUILD_TYPE})
+else ()
+  file (MAKE_DIRECTORY "${HDF5_FORTRAN_TESTS_BINARY_DIR}/shared")
+  set (MODSH_BUILD_DIR ${CMAKE_Fortran_MODULE_DIRECTORY}/shared/${HDF_CFG_BUILD_TYPE})
 endif ()
 
 #-----------------------------------------------------------------------------
@@ -51,9 +50,9 @@ if (NOT BUILD_SHARED_LIBS)
       INTERFACE "$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/include>"
   )
   TARGET_C_PROPERTIES (${HDF5_F90_C_TEST_LIB_TARGET} STATIC)
-  target_link_libraries (${HDF5_F90_C_TEST_LIB_TARGET} PRIVATE
-      ${HDF5_F90_C_LIB_TARGET}
-      ${HDF5_TEST_LIB_TARGET}
+  target_link_libraries (${HDF5_F90_C_TEST_LIB_TARGET}
+      PRIVATE ${HDF5_F90_C_LIB_TARGET}
+      PUBLIC ${HDF5_TEST_LIB_TARGET}
   )
   H5_SET_LIB_OPTIONS (${HDF5_F90_C_TEST_LIB_TARGET} ${HDF5_F90_C_TEST_LIB_NAME} STATIC 0)
   set_target_properties (${HDF5_F90_C_TEST_LIB_TARGET} PROPERTIES
@@ -70,9 +69,9 @@ else ()
       PUBLIC "H5_BUILT_AS_DYNAMIC_LIB"
   )
   TARGET_C_PROPERTIES (${HDF5_F90_C_TEST_LIBSH_TARGET} SHARED)
-  target_link_libraries (${HDF5_F90_C_TEST_LIBSH_TARGET} PRIVATE
-      ${HDF5_F90_C_LIBSH_TARGET}
-      ${HDF5_TEST_LIBSH_TARGET}
+  target_link_libraries (${HDF5_F90_C_TEST_LIBSH_TARGET}
+      PRIVATE ${HDF5_F90_C_LIBSH_TARGET}
+      PUBLIC ${HDF5_TEST_LIBSH_TARGET}
   )
   H5_SET_LIB_OPTIONS (${HDF5_F90_C_TEST_LIBSH_TARGET} ${HDF5_F90_C_TEST_LIB_NAME} SHARED "F")
   set_target_properties (${HDF5_F90_C_TEST_LIBSH_TARGET} PROPERTIES
diff --git a/fortran/test/tH5O_F03.F90 b/fortran/test/tH5O_F03.F90
index d1a9ddb..78b6453 100644
--- a/fortran/test/tH5O_F03.F90
+++ b/fortran/test/tH5O_F03.F90
@@ -270,8 +270,6 @@ CONTAINS
 ! A(8) = tm_yday  int   days since January 1       0-365
 ! A(9) = tm_isdst int   Daylight Saving Time flag
 !
-    INTEGER(C_INT), DIMENSION(:), POINTER :: c_atime, c_btime, c_ctime, c_mtime
-    INTEGER(C_INT), DIMENSION(1:8) :: atime, btime, ctime, mtime
     INTEGER :: len, i
     INTEGER :: idx
     INTEGER :: ierr
diff --git a/hl/fortran/src/H5TBff.F90 b/hl/fortran/src/H5TBff.F90
index d18d023..40adf95 100644
--- a/hl/fortran/src/H5TBff.F90
+++ b/hl/fortran/src/H5TBff.F90
@@ -939,10 +939,10 @@ CONTAINS
     INTEGER(size_t),  DIMENSION(nfields), INTENT(inout) :: field_offsets  ! field offsets
     INTEGER(size_t),  INTENT(inout):: type_size                           ! type size
     INTEGER :: errcode                                                    ! error code
-    INTEGER, OPTIONAL :: maxlen_out                                       ! maximum character len of the field names
+    INTEGER(size_t), OPTIONAL :: maxlen_out                               ! maximum character len of the field names
     INTEGER(size_t) :: namelen                                            ! name length
     INTEGER(size_t), DIMENSION(nfields) :: namelen2                       ! name lengths
-    INTEGER(hsize_t) :: i                                                          ! general purpose integer
+    INTEGER(hsize_t) :: i                                                 ! general purpose integer
     INTEGER(size_t) :: maxlen
     INTEGER(size_t) :: c_maxlen_out
     
diff --git a/hl/fortran/test/tstimage.F90 b/hl/fortran/test/tstimage.F90
index d6bd1e2..8586e68 100644
--- a/hl/fortran/test/tstimage.F90
+++ b/hl/fortran/test/tstimage.F90
@@ -62,7 +62,7 @@ character(len=4), parameter :: dsetname2 = "img2"    ! dataset name
 character(len=15), parameter :: il ="INTERLACE_PIXEL"! dataset name
 integer(hid_t) :: file_id                            ! file identifier
 integer(hsize_t), parameter :: width  = 500          ! width of image
-integer(hsize_t), parameter :: height = 200          ! height of image
+integer(hsize_t), parameter :: height = 270          ! height of image
 integer, parameter :: pal_entries = 9                ! palette number of entries
 integer, dimension(width*height) :: buf1             ! data buffer
 integer, dimension(width*height) :: bufr1            ! data buffer
diff --git a/hl/fortran/test/tsttable.F90 b/hl/fortran/test/tsttable.F90
index 38cfa86..840d33d 100644
--- a/hl/fortran/test/tsttable.F90
+++ b/hl/fortran/test/tsttable.F90
@@ -93,7 +93,7 @@ SUBROUTINE test_table1()
   INTEGER(SIZE_T),  DIMENSION(1:nfields) :: field_offsetr ! field offset
   INTEGER(SIZE_T),  DIMENSION(1:nfields) :: field_sizesr  ! field sizes
   INTEGER(SIZE_T)  :: type_sizeout = 0                    ! size of the datatype
-  INTEGER :: maxlen = 0                                   ! max chararter length of a field name
+  INTEGER(SIZE_T)  :: maxlen = 0                          ! max character length of a field name
   INTEGER :: Cs_sizeof_double = H5_SIZEOF_DOUBLE          ! C's sizeof double
   INTEGER :: SIZEOF_X
   LOGICAL :: Exclude_double
diff --git a/hl/src/H5LDprivate.h b/hl/src/H5LDprivate.h
index b52928b..203bcea 100644
--- a/hl/src/H5LDprivate.h
+++ b/hl/src/H5LDprivate.h
@@ -19,9 +19,9 @@
 #include "H5LDpublic.h"
 
 /* Store information for a field in <list_of_fields> for a compound data type */
-/* 
+/*
  *  Note: This data structure is used by both H5LD.c and hl/tools/h5watch
- *	  This declaration is repeated in tools/lib/h5tools_str.c 
+ *      This declaration is repeated in tools/lib/h5tools_str.c
  */
 typedef struct H5LD_memb_t {
     size_t tot_offset;
@@ -30,7 +30,10 @@ typedef struct H5LD_memb_t {
     char **names;
 } H5LD_memb_t;
 
-/* 
+#ifdef __cplusplus
+extern "C" {
+#endif
+/*
  * Note that these two private routines are called by hl/tools/h5watch.
  * Have considered the following options:
  *   1) Repeat the coding in both H5LD.c and h5watch
@@ -40,8 +43,12 @@ typedef struct H5LD_memb_t {
  * #2: these two routines are too specific to be made as public routines
  * Decide to do #3 at this point of time after some discussion.
  */
-void H5LD_clean_vector(H5LD_memb_t *listv[]);
-int H5LD_construct_vector(char *fields, H5LD_memb_t *listv[], hid_t par_tid);
+H5_HLDLL void H5LD_clean_vector(H5LD_memb_t *listv[]);
+H5_HLDLL int H5LD_construct_vector(char *fields, H5LD_memb_t *listv[], hid_t par_tid);
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif /* end _H5LDprivate_H */
 
diff --git a/hl/src/H5LT.c b/hl/src/H5LT.c
index 0074d02..3ebca95 100644
--- a/hl/src/H5LT.c
+++ b/hl/src/H5LT.c
@@ -2264,7 +2264,7 @@ out:
 *-------------------------------------------------------------------------
 */
 static char* 
-realloc_and_append(hbool_t _no_user_buf, size_t *len, char *buf, char *str_to_add)
+realloc_and_append(hbool_t _no_user_buf, size_t *len, char *buf, const char *str_to_add)
 {
     size_t size_str_to_add, size_str;
 
@@ -2360,7 +2360,6 @@ print_enum(hid_t type, char* str, size_t *str_len, hbool_t no_ubuf, size_t indt)
 {
     char           **name = NULL;   /*member names                   */
     unsigned char   *value = NULL;  /*value array                    */
-    unsigned char   *copy = NULL;   /*a pointer to value array       */
     int              nmembs;        /*number of members              */
     char             tmp_str[TMP_LEN];
     int              nchars;        /*number of output characters    */
@@ -2418,17 +2417,15 @@ print_enum(hid_t type, char* str, size_t *str_len, hbool_t no_ubuf, size_t indt)
         nchars = HDsnprintf(tmp_str, TMP_LEN, "\"%s\"", name[i]);
         if(!(str = realloc_and_append(no_ubuf, str_len, str, tmp_str)))
             goto out;
-        HDsnprintf(tmp_str, TMP_LEN, "%*s   ", MAX(0, 16 - nchars), "");
+        HDmemset(tmp_str, ' ', (size_t)MAX(3, 19 - nchars) + 1);
+        tmp_str[MAX(3, 19 - nchars)] = '\0';
         if(!(str = realloc_and_append(no_ubuf, str_len, str, tmp_str)))
             goto out;
 
-        /*On SGI Altix(cobalt), wrong values were printed out with "value+i*dst_size"
-         *strangely, unless use another pointer "copy".*/
-        copy = value + (size_t)i * dst_size;
         if (H5T_SGN_NONE == H5Tget_sign(native))
-            HDsnprintf(tmp_str, TMP_LEN, "%u", *((unsigned int*)((void *)copy)));
+            HDsnprintf(tmp_str, TMP_LEN, "%u", *((unsigned int*)(value + (size_t)i * dst_size)));
         else
-            HDsnprintf(tmp_str, TMP_LEN, "%d", *((int*)((void *)copy)));
+            HDsnprintf(tmp_str, TMP_LEN, "%d", *((int*)(value + (size_t)i * dst_size)));
         if(!(str = realloc_and_append(no_ubuf, str_len, str, tmp_str)))
             goto out;
 
@@ -2450,8 +2447,12 @@ print_enum(hid_t type, char* str, size_t *str_len, hbool_t no_ubuf, size_t indt)
 out:
 
     if(0 == nmembs) {
-        HDsnprintf(tmp_str, TMP_LEN, "\n%*s <empty>", (int)(indt + 4), "");
+        str = realloc_and_append(no_ubuf, str_len, str, "\n");
+        HDassert((indt + 4) < TMP_LEN);
+        HDmemset(tmp_str, ' ', (indt + 4) + 1);
+        tmp_str[(indt + 4)] = '\0';
         str = realloc_and_append(no_ubuf, str_len, str, tmp_str);
+        str = realloc_and_append(no_ubuf, str_len, str, " <empty>");
     } /* end if */
 
     /* Release resources */
diff --git a/hl/test/test_ds.c b/hl/test/test_ds.c
index 95178fc..d7af9e9 100644
--- a/hl/test/test_ds.c
+++ b/hl/test/test_ds.c
@@ -1138,7 +1138,7 @@ static int test_detachscales(void)
     int     rank3 = 3;
     hsize_t dims[] = {1,2,3}; /*some bogus numbers, not important for the test*/
     int     *buf = NULL;
-    char    dname[10];
+    char    dname[16];
     int     i;
 
     /* This tests creates two three dimensional datasets; then it creates
diff --git a/hl/tools/gif2h5/CMakeTests.cmake b/hl/tools/gif2h5/CMakeTests.cmake
index 61c004e..1cc989c 100644
--- a/hl/tools/gif2h5/CMakeTests.cmake
+++ b/hl/tools/gif2h5/CMakeTests.cmake
@@ -27,6 +27,12 @@ HDFTEST_COPY_FILE("${HDF5_HL_TOOLS_GIF2H5_SOURCE_DIR}/testfiles/h52giftst.h5" "$
 HDFTEST_COPY_FILE("${HDF5_HL_TOOLS_GIF2H5_SOURCE_DIR}/testfiles/ex_image2.h5" "${PROJECT_BINARY_DIR}/testfiles/ex_image2.h5" "gif2h5_files")
 add_custom_target(gif2h5_files ALL COMMENT "Copying files needed by gif2h5 tests" DEPENDS ${gif2h5_files_list})
 
+if (NOT BUILD_SHARED_LIBS)
+  set (tgt_ext "")
+else ()
+  set (tgt_ext "-shared")
+endif ()
+
 # Remove any output file left over from previous test run
 add_test (
     NAME HL_TOOLS-clear-objects
@@ -38,19 +44,19 @@ add_test (
         image24.gif
 )
 
-add_test (NAME HL_TOOLS_gif2h5 COMMAND $<TARGET_FILE:gif2h5> testfiles/image1.gif image1.h5)
+add_test (NAME HL_TOOLS_gif2h5 COMMAND $<TARGET_FILE:gif2h5${tgt_ext}> testfiles/image1.gif image1.h5)
 set_tests_properties (HL_TOOLS_gif2h5 PROPERTIES DEPENDS HL_TOOLS-clear-objects)
 
-add_test (NAME HL_TOOLS_h52gif COMMAND $<TARGET_FILE:h52gif> testfiles/h52giftst.h5 image1.gif -i image)
+add_test (NAME HL_TOOLS_h52gif COMMAND $<TARGET_FILE:h52gif${tgt_ext}> testfiles/h52giftst.h5 image1.gif -i image)
 set_tests_properties (HL_TOOLS_h52gif PROPERTIES DEPENDS HL_TOOLS-clear-objects)
 
-add_test (NAME HL_TOOLS_h52gif_none COMMAND $<TARGET_FILE:h52gif> testfiles/h52giftst.h5 image.gif -i nosuch_image)
+add_test (NAME HL_TOOLS_h52gif_none COMMAND $<TARGET_FILE:h52gif${tgt_ext}> testfiles/h52giftst.h5 image.gif -i nosuch_image)
 set_tests_properties (HL_TOOLS_h52gif_none PROPERTIES WILL_FAIL "true")
 set_tests_properties (HL_TOOLS_h52gif_none PROPERTIES DEPENDS HL_TOOLS-clear-objects)
 
-#add_test (NAME HL_TOOLS_h52gifpal COMMAND $<TARGET_FILE:h52gif> testfiles/h52giftst.h5 image.gif -i palette)
+#add_test (NAME HL_TOOLS_h52gifpal COMMAND $<TARGET_FILE:h52gif${tgt_ext}> testfiles/h52giftst.h5 image.gif -i palette)
 #set_tests_properties (HL_TOOLS_h52gifpal PROPERTIES WILL_FAIL "true")
 
-add_test (NAME HL_TOOLS_h52gif24bits COMMAND $<TARGET_FILE:h52gif> testfiles/ex_image2.h5 image24.gif -i image24bitpixel)
+add_test (NAME HL_TOOLS_h52gif24bits COMMAND $<TARGET_FILE:h52gif${tgt_ext}> testfiles/ex_image2.h5 image24.gif -i image24bitpixel)
 set_tests_properties (HL_TOOLS_h52gif24bits PROPERTIES WILL_FAIL "true")
 set_tests_properties (HL_TOOLS_h52gif24bits PROPERTIES DEPENDS HL_TOOLS-clear-objects)
diff --git a/hl/tools/h5watch/CMakeTests.cmake b/hl/tools/h5watch/CMakeTests.cmake
index e5a7641..fba8484 100644
--- a/hl/tools/h5watch/CMakeTests.cmake
+++ b/hl/tools/h5watch/CMakeTests.cmake
@@ -68,12 +68,18 @@ add_custom_target(H5WATCH_files ALL COMMENT "Copying files needed by H5WATCH tes
 ##############################################################################
 ##############################################################################
 
+  if (NOT BUILD_SHARED_LIBS)
+    set (tgt_ext "")
+  else ()
+    set (tgt_ext "-shared")
+  endif ()
+
   macro (ADD_H5_TEST resultfile resultcode)
     if (NOT HDF5_ENABLE_USING_MEMCHECKER)
       add_test (
           NAME H5WATCH_ARGS-h5watch-${resultfile}
           COMMAND "${CMAKE_COMMAND}"
-              -D "TEST_PROGRAM=$<TARGET_FILE:h5watch>"
+              -D "TEST_PROGRAM=$<TARGET_FILE:h5watch${tgt_ext}>"
               -D "TEST_ARGS:STRING=${ARGN}"
               -D "TEST_FOLDER=${PROJECT_BINARY_DIR}/testfiles"
               -D "TEST_OUTPUT=${resultfile}.out"
@@ -91,7 +97,7 @@ add_custom_target(H5WATCH_files ALL COMMENT "Copying files needed by H5WATCH tes
       add_test (
           NAME H5WATCH_ARGS-h5watch-${resultfile}
           COMMAND "${CMAKE_COMMAND}"
-              -D "TEST_PROGRAM=$<TARGET_FILE:h5watch>"
+              -D "TEST_PROGRAM=$<TARGET_FILE:h5watch${tgt_ext}>"
               -D "TEST_ARGS:STRING=${ARGN}"
               -D "TEST_FOLDER=${PROJECT_BINARY_DIR}/testfiles"
               -D "TEST_OUTPUT=${resultfile}.out"
@@ -116,7 +122,7 @@ add_custom_target(H5WATCH_files ALL COMMENT "Copying files needed by H5WATCH tes
       add_test (
           NAME H5WATCH-${resultfile}
           COMMAND "${CMAKE_COMMAND}"
-              -D "TEST_PROGRAM=$<TARGET_FILE:h5watch>"
+              -D "TEST_PROGRAM=$<TARGET_FILE:h5watch${tgt_ext}>"
               -D "TEST_ARGS:STRING=${ARGN}"
               -D "TEST_FOLDER=${PROJECT_BINARY_DIR}/testfiles"
               -D "TEST_OUTPUT=${resultfile}.out"
diff --git a/src/H5Clog_trace.c b/src/H5Clog_trace.c
index 7c1305c..713f333 100644
--- a/src/H5Clog_trace.c
+++ b/src/H5Clog_trace.c
@@ -41,7 +41,7 @@
 /****************/
 
 /* Max log message size */
-#define H5C_MAX_TRACE_LOG_MSG_SIZE 2048
+#define H5C_MAX_TRACE_LOG_MSG_SIZE 4096
 
 
 /******************/
diff --git a/src/H5D.c b/src/H5D.c
index 5ceee11..a8cefd9 100644
--- a/src/H5D.c
+++ b/src/H5D.c
@@ -437,7 +437,7 @@ H5Dget_type(hid_t dset_id)
     if(NULL == (vol_obj = (H5VL_object_t *)H5I_object_verify(dset_id, H5I_DATASET)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "invalid dataset identifier")
 
-    /* get the datatype */
+    /* Get the datatype */
     if(H5VL_dataset_get(vol_obj, H5VL_DATASET_GET_TYPE, H5P_DATASET_XFER_DEFAULT, H5_REQUEST_NULL, &ret_value) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, H5I_INVALID_HID, "unable to get datatype")
 
diff --git a/src/H5Dint.c b/src/H5Dint.c
index 220f026..cd120d0 100644
--- a/src/H5Dint.c
+++ b/src/H5Dint.c
@@ -1095,7 +1095,6 @@ H5D__build_file_prefix(const H5D_t *dset, H5F_prefix_open_t prefix_type, char **
     size_t          filepath_len;         /* length of file path                            */
     size_t          prefix_len;           /* length of prefix                               */
     size_t          file_prefix_len;      /* length of expanded prefix                      */
-    H5P_genplist_t  *plist = NULL;        /* Property list pointer                          */
     herr_t          ret_value = SUCCEED;  /* Return value                                   */
 
     FUNC_ENTER_STATIC
@@ -2202,30 +2201,6 @@ H5D_nameof(const H5D_t *dataset)
 
 
 /*-------------------------------------------------------------------------
- * Function: H5D_typeof
- *
- * Purpose:  Returns a pointer to the dataset's datatype.  The datatype
- *           is not copied.
- *
- * Return:   Success:    Ptr to the dataset's datatype, uncopied.
- *           Failure:    NULL
- *-------------------------------------------------------------------------
- */
-H5T_t *
-H5D_typeof(const H5D_t *dset)
-{
-    /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    HDassert(dset);
-    HDassert(dset->shared);
-    HDassert(dset->shared->type);
-
-    FUNC_LEAVE_NOAPI(dset->shared->type)
-} /* end H5D_typeof() */
-
-
-/*-------------------------------------------------------------------------
  * Function: H5D__alloc_storage
  *
  * Purpose:  Allocate storage for the raw data of a dataset.
diff --git a/src/H5Dmpio.c b/src/H5Dmpio.c
index ee8bde2..467b1b7 100644
--- a/src/H5Dmpio.c
+++ b/src/H5Dmpio.c
@@ -2806,8 +2806,9 @@ H5D__chunk_redistribute_shared_chunks(const H5D_io_info_t *io_info, const H5D_ty
         /* Sort the new list in order of previous owner so that each original owner of a chunk
          * entry gets that entry back, with the possibly newly-modified "new_owner" field
          */
-        HDqsort(shared_chunks_info_array, shared_chunks_info_array_num_entries,
-                sizeof(H5D_filtered_collective_io_info_t), H5D__cmp_filtered_collective_io_info_entry_owner);
+        if(shared_chunks_info_array_num_entries > 1)
+            HDqsort(shared_chunks_info_array, shared_chunks_info_array_num_entries,
+                    sizeof(H5D_filtered_collective_io_info_t), H5D__cmp_filtered_collective_io_info_entry_owner);
 
         send_displacements[0] = 0;
         for (i = 1; i < (size_t) mpi_size; i++)
diff --git a/src/H5Dprivate.h b/src/H5Dprivate.h
index 6fb7889..bc44d2a 100644
--- a/src/H5Dprivate.h
+++ b/src/H5Dprivate.h
@@ -166,7 +166,6 @@ H5_DLL herr_t H5D_mult_refresh_close(hid_t dset_id);
 H5_DLL herr_t H5D_mult_refresh_reopen(H5D_t *dataset);
 H5_DLL H5O_loc_t *H5D_oloc(H5D_t *dataset);
 H5_DLL H5G_name_t *H5D_nameof(const H5D_t *dataset);
-H5_DLL H5T_t *H5D_typeof(const H5D_t *dset);
 H5_DLL herr_t H5D_flush_all(const H5F_t *f);
 H5_DLL hid_t H5D_get_create_plist(const H5D_t *dset);
 H5_DLL hid_t H5D_get_access_plist(const H5D_t *dset);
diff --git a/src/H5Fint.c b/src/H5Fint.c
index edd0e8e..4021e41 100644
--- a/src/H5Fint.c
+++ b/src/H5Fint.c
@@ -509,6 +509,7 @@ H5F__get_objects_cb(void *obj_ptr, hid_t obj_id, void *key)
             case H5I_ERROR_CLASS:
             case H5I_ERROR_MSG:
             case H5I_ERROR_STACK:
+            case H5I_SPACE_SEL_ITER:
             case H5I_NTYPES:
             default:
                 HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5_ITER_ERROR, "unknown or invalid data object")
@@ -3610,6 +3611,7 @@ H5F__get_file(void *obj, H5I_type_t type)
         case H5I_ERROR_CLASS:
         case H5I_ERROR_MSG:
         case H5I_ERROR_STACK:
+        case H5I_SPACE_SEL_ITER:
         case H5I_NTYPES:
         default:
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not a file or file object")
diff --git a/src/H5Fprivate.h b/src/H5Fprivate.h
index 43644ac..a8ac158 100644
--- a/src/H5Fprivate.h
+++ b/src/H5Fprivate.h
@@ -160,16 +160,16 @@ typedef struct H5F_t H5F_t;
    (i) |= (uint16_t)((*(p) & 0xff) << 8); (p)++;                  \
 }
 
-#  define INT32DECODE(p, i) {                              \
-   (i)    = ((int32_t)(*(p) & (unsigned)0xff));      (p)++;              \
-   (i) |= ((int32_t)(*(p) & (unsigned)0xff) <<  8); (p)++;              \
-   (i) |= ((int32_t)(*(p) & (unsigned)0xff) << 16); (p)++;              \
-   (i) |= ((int32_t)(((*(p) & (unsigned)0xff) << 24) |                        \
-                   ((*(p) & (unsigned)0x80) ? (unsigned)(~0xffffffff) : (unsigned)0x0))); (p)++; \
+#  define INT32DECODE(p, i) {                                \
+   (i)  = ((int32_t)(*(p) & 0xff));      (p)++;              \
+   (i) |= ((int32_t)(*(p) & 0xff) <<  8); (p)++;             \
+   (i) |= ((int32_t)(*(p) & 0xff) << 16); (p)++;             \
+   (i) |= ((int32_t)(((*(p) & (unsigned)0xff) << 24) |                 \
+            ((*(p) & 0x80) ? ~0xffffffffULL : 0x0ULL))); (p)++;    \
 }
 
-#  define UINT32DECODE(p, i) {                              \
-   (i)    =  (uint32_t)(*(p) & 0xff);       (p)++;                  \
+#  define UINT32DECODE(p, i) {                                     \
+   (i)  =  (uint32_t)(*(p) & 0xff);       (p)++;                   \
    (i) |= ((uint32_t)(*(p) & 0xff) <<  8); (p)++;                  \
    (i) |= ((uint32_t)(*(p) & 0xff) << 16); (p)++;                  \
    (i) |= ((uint32_t)(*(p) & 0xff) << 24); (p)++;                  \
diff --git a/src/H5Fsuper.c b/src/H5Fsuper.c
index cc68889..fb68c73 100644
--- a/src/H5Fsuper.c
+++ b/src/H5Fsuper.c
@@ -513,15 +513,12 @@ H5F__super_read(H5F_t *f, H5P_genplist_t *fa_plist, hbool_t initial_read)
 #endif /* H5_HAVE_PARALLEL */
 
     /* Check if superblock address is different from base address and adjust
-     * base address and "end of address" address if so.
+     * base address and "end of file" address if so.
      */
     if(!H5F_addr_eq(super_addr, sblock->base_addr)) {
-        /* Check if the superblock moved earlier in the file */
-        if(H5F_addr_lt(super_addr, sblock->base_addr))
-            udata.stored_eof -= (sblock->base_addr - super_addr);
-        else
-            /* The superblock moved later in the file */
-            udata.stored_eof += (super_addr - sblock->base_addr);
+        /* If the superblock moved in the file, adjust the EOF */
+        /* (Handles moving earlier & later) */
+        udata.stored_eof -= (sblock->base_addr - super_addr);
 
         /* Adjust base address for offsets of the HDF5 data in the file */
         sblock->base_addr = super_addr;
diff --git a/src/H5Gloc.c b/src/H5Gloc.c
index 5724031..e47d3be 100644
--- a/src/H5Gloc.c
+++ b/src/H5Gloc.c
@@ -226,7 +226,10 @@ H5G_loc_real(void *obj, H5I_type_t type, H5G_loc_t *loc)
             HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "unable to get group location of a virtual file driver (VFD)")
 
         case H5I_VOL:
-            HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "unable to get group location of a virtual object layer (VOL) driver")
+            HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "unable to get group location of a virtual object layer (VOL) connector")
+
+        case H5I_SPACE_SEL_ITER:
+            HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "unable to get group location of a dataspace selection iterator")
 
         case H5I_UNINIT:
         case H5I_BADID:
diff --git a/src/H5Gname.c b/src/H5Gname.c
index fa0a925..16c1ca7 100644
--- a/src/H5Gname.c
+++ b/src/H5Gname.c
@@ -828,6 +828,7 @@ H5G_name_replace_cb(void *obj_ptr, hid_t obj_id, void *key)
         case H5I_ERROR_CLASS:
         case H5I_ERROR_MSG:
         case H5I_ERROR_STACK:
+        case H5I_SPACE_SEL_ITER:
         case H5I_NTYPES:
         default:
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "unknown data object")
diff --git a/src/H5Gtest.c b/src/H5Gtest.c
index af6acb3..0b431b1 100644
--- a/src/H5Gtest.c
+++ b/src/H5Gtest.c
@@ -616,6 +616,7 @@ H5G__user_path_test(hid_t obj_id, char *user_path, size_t *user_path_len, unsign
         case H5I_ERROR_CLASS:
         case H5I_ERROR_MSG:
         case H5I_ERROR_STACK:
+        case H5I_SPACE_SEL_ITER:
         case H5I_NTYPES:
         default:
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "unknown data object type")
diff --git a/src/H5I.c b/src/H5I.c
index 87ff04a..cdc849b 100644
--- a/src/H5I.c
+++ b/src/H5I.c
@@ -2171,7 +2171,6 @@ H5Iget_name(hid_t id, char *name/*out*/, size_t size)
 {
     H5VL_object_t *vol_obj;     /* Object token of loc_id */
     H5VL_loc_params_t loc_params;
-    H5G_loc_t     loc;          /* Object location */
     ssize_t       ret_value;    /* Return value */
 
     FUNC_ENTER_API((-1))
@@ -2384,6 +2383,7 @@ H5I__id_dump_cb(void *_item, void H5_ATTR_UNUSED *_key, void *_udata)
         case H5I_ERROR_CLASS:
         case H5I_ERROR_MSG:
         case H5I_ERROR_STACK:
+        case H5I_SPACE_SEL_ITER:
         case H5I_NTYPES:
         default:
             break;   /* Other types of IDs are not stored in files */
diff --git a/src/H5MM.c b/src/H5MM.c
index 1a5a149..85d82a9 100644
--- a/src/H5MM.c
+++ b/src/H5MM.c
@@ -589,13 +589,11 @@ H5MM_memcpy(void *dest, const void *src, size_t n)
 
     HDassert(dest);
     HDassert(src);
-#if 0
-    /* Commented out while we investigate overlapping buffers in the
-     * parallel filter code (HDFFV-10735).
-     */
+
+    /* Check for buffer overlap */
     HDassert((char *)dest >= (const char *)src + n || (const char *)src >= (char *)dest + n);
-#endif
 
+    /* Copy */
     ret = HDmemcpy(dest, src, n);
 
     FUNC_LEAVE_NOAPI(ret)
diff --git a/src/H5O.c b/src/H5O.c
index 0fdb9be..093d429 100644
--- a/src/H5O.c
+++ b/src/H5O.c
@@ -1102,6 +1102,7 @@ H5Oclose(hid_t object_id)
         case H5I_ERROR_CLASS:
         case H5I_ERROR_MSG:
         case H5I_ERROR_STACK:
+        case H5I_SPACE_SEL_ITER:
         case H5I_NTYPES:
         default:
             HGOTO_ERROR(H5E_ARGS, H5E_CANTRELEASE, FAIL, "not a valid file object ID (dataset, group, or datatype)")
diff --git a/src/H5Oflush.c b/src/H5Oflush.c
index da9d1d0..f5ede4a 100644
--- a/src/H5Oflush.c
+++ b/src/H5Oflush.c
@@ -491,6 +491,7 @@ H5O_refresh_metadata_reopen(hid_t oid, H5G_loc_t *obj_loc, H5VL_t *vol_connector
         case H5I_ERROR_CLASS:
         case H5I_ERROR_MSG:
         case H5I_ERROR_STACK:
+        case H5I_SPACE_SEL_ITER:
         case H5I_NTYPES:
         default:
             HGOTO_ERROR(H5E_OHDR, H5E_BADTYPE, FAIL, "not a valid file object ID (dataset, group, or datatype)")
diff --git a/src/H5Oint.c b/src/H5Oint.c
index 60aae45..45a8046 100644
--- a/src/H5Oint.c
+++ b/src/H5Oint.c
@@ -1848,6 +1848,7 @@ H5O_get_loc(hid_t object_id)
         case H5I_ERROR_CLASS:
         case H5I_ERROR_MSG:
         case H5I_ERROR_STACK:
+        case H5I_SPACE_SEL_ITER:
         case H5I_NTYPES:
         default:
             HGOTO_ERROR(H5E_OHDR, H5E_BADTYPE, NULL, "invalid object type")
diff --git a/src/H5Opkg.h b/src/H5Opkg.h
index 668f4f0..4afa452 100644
--- a/src/H5Opkg.h
+++ b/src/H5Opkg.h
@@ -134,9 +134,9 @@
                 ) : 0))							      \
     )
 #define H5O_SIZEOF_MSGHDR_OH(O)						      \
-    H5O_SIZEOF_MSGHDR_VERS((O)->version, (O)->flags & H5O_HDR_ATTR_CRT_ORDER_TRACKED)
+    (unsigned)H5O_SIZEOF_MSGHDR_VERS((O)->version, (O)->flags & H5O_HDR_ATTR_CRT_ORDER_TRACKED)
 #define H5O_SIZEOF_MSGHDR_F(F, C)						      \
-    H5O_SIZEOF_MSGHDR_VERS(MAX((H5F_STORE_MSG_CRT_IDX(F) ? H5O_VERSION_LATEST : H5O_VERSION_1), (uint8_t)H5O_obj_ver_bounds[H5F_LOW_BOUND(F)]), (C))
+    (unsigned)H5O_SIZEOF_MSGHDR_VERS(MAX((H5F_STORE_MSG_CRT_IDX(F) ? H5O_VERSION_LATEST : H5O_VERSION_1), (uint8_t)H5O_obj_ver_bounds[H5F_LOW_BOUND(F)]), (C))
 
 /*
  * Size of chunk "header" for each chunk
diff --git a/src/H5Pint.c b/src/H5Pint.c
index 04411a5..0670adc 100644
--- a/src/H5Pint.c
+++ b/src/H5Pint.c
@@ -3133,7 +3133,7 @@ H5P__class_get(const H5P_genclass_t *pclass, const char *name, void *value)
         HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "property has zero size")
 
     /* Copy the property value */
-    HDmemcpy(value, prop->value, prop->size);
+    H5MM_memcpy(value, prop->value, prop->size);
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -3189,7 +3189,7 @@ H5P__class_set(const H5P_genclass_t *pclass, const char *name, const void *value
         HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "property has zero size")
 
     /* Copy the property value */
-    HDmemcpy(prop->value, value, prop->size);
+    H5MM_memcpy(prop->value, value, prop->size);
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5SM.c b/src/H5SM.c
index 3946f51..290e575 100644
--- a/src/H5SM.c
+++ b/src/H5SM.c
@@ -274,6 +274,7 @@ H5SM__type_to_flag(unsigned type_id, unsigned *type_flag)
         case H5O_FILL_ID:
             type_id = H5O_FILL_NEW_ID;
             /* Fall through... */
+            H5_ATTR_FALLTHROUGH
 
         case H5O_SDSPACE_ID:
         case H5O_DTYPE_ID:
diff --git a/src/H5Shyper.c b/src/H5Shyper.c
index 4c8e458..2acc135 100644
--- a/src/H5Shyper.c
+++ b/src/H5Shyper.c
@@ -2142,18 +2142,25 @@ loc += fast_dim_buf_off;
                     do
                       {
                         DUFF_GUTS
+                        H5_ATTR_FALLTHROUGH
                 case 7:
                         DUFF_GUTS
+                        H5_ATTR_FALLTHROUGH
                 case 6:
                         DUFF_GUTS
+                        H5_ATTR_FALLTHROUGH
                 case 5:
                         DUFF_GUTS
+                        H5_ATTR_FALLTHROUGH
                 case 4:
                         DUFF_GUTS
+                        H5_ATTR_FALLTHROUGH
                 case 3:
                         DUFF_GUTS
+                        H5_ATTR_FALLTHROUGH
                 case 2:
                         DUFF_GUTS
+                        H5_ATTR_FALLTHROUGH
                 case 1:
                         DUFF_GUTS
                   } while (--duffs_index > 0);
@@ -10013,6 +10020,7 @@ H5S_select_hyperslab(H5S_t *space, H5S_seloper_t op, const hsize_t start[],
             if(op == H5S_SELECT_SET)      /* Allow only "set" operation to proceed */
                 break;
             /* Else fall through to error */
+            H5_ATTR_FALLTHROUGH
 
         case H5S_SEL_ERROR:
         case H5S_SEL_N:
diff --git a/src/H5Sselect.c b/src/H5Sselect.c
index c40ff69..c383fed 100644
--- a/src/H5Sselect.c
+++ b/src/H5Sselect.c
@@ -1395,7 +1395,7 @@ done:
  PURPOSE
     Release a selection iterator's resources.
  USAGE
-    hssize_t H5S_select_iter_release(sel_iter)
+    herr_t H5S_select_iter_release(sel_iter)
         H5S_sel_iter_t *sel_iter; IN: Selection iterator to query
  RETURNS
     The number of elements in selection on success, 0 on failure
diff --git a/src/H5T.c b/src/H5T.c
index 8c8a9b7..6fe291e 100644
--- a/src/H5T.c
+++ b/src/H5T.c
@@ -1697,33 +1697,42 @@ done:
  *-------------------------------------------------------------------------
  */
 hid_t
-H5Tcopy(hid_t type_id)
+H5Tcopy(hid_t obj_id)
 {
-    H5T_t    *dt        = NULL;     /* Pointer to the datatype to copy */
-    H5T_t    *new_dt    = NULL;
-    hid_t    ret_value  = H5I_INVALID_HID;  /* Return value */
+    H5T_t  *dt          = NULL;     /* Pointer to the datatype to copy */
+    H5T_t  *new_dt      = NULL;     /* Pointer to the new datatype */
+    hid_t   dset_tid    = H5I_INVALID_HID;  /* Datatype ID from dataset */
+    hid_t   ret_value   = H5I_INVALID_HID;  /* Return value */
 
     FUNC_ENTER_API(H5I_INVALID_HID)
-    H5TRACE1("i", "i", type_id);
+    H5TRACE1("i", "i", obj_id);
 
-    switch(H5I_get_type(type_id)) {
+    switch(H5I_get_type(obj_id)) {
         case H5I_DATATYPE:
-            /* The argument is a datatype handle */
-            if(NULL == (dt = (H5T_t *)H5I_object(type_id)))
-                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a datatype")
+            if(NULL == (dt = (H5T_t *)H5I_object(obj_id)))
+                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "type_id is not a datatype ID")
             break;
 
         case H5I_DATASET:
-            {
-                H5D_t    *dset;          /* Dataset for datatype */
+        {
+            H5VL_object_t  *vol_obj     = NULL;             /* Dataset structure */
+
+            /* Check args */
+            if(NULL == (vol_obj = (H5VL_object_t *)H5I_object_verify(obj_id, H5I_DATASET)))
+                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "type_id is not a dataset ID")
+
+            /* Get the datatype from the dataset
+             * NOTE: This will have to be closed after we're done with it.
+             */
+            if(H5VL_dataset_get(vol_obj, H5VL_DATASET_GET_TYPE, H5P_DATASET_XFER_DEFAULT, H5_REQUEST_NULL, &dset_tid) < 0)
+                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, H5I_INVALID_HID, "unable to get datatype from the dataset")
+
+            /* Unwrap the type ID */
+            if(NULL == (dt = (H5T_t *)H5I_object(dset_tid)))
+                HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, H5I_INVALID_HID, "received invalid datatype from the dataset")
 
-                /* The argument is a dataset handle */
-                if(NULL == (dset = (H5D_t *)H5VL_object(type_id)))
-                    HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a dataset")
-                if(NULL == (dt = H5D_typeof(dset)))
-                    HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, H5I_INVALID_HID, "unable to get the dataset datatype")
-            }
             break;
+        }
 
         case H5I_UNINIT:
         case H5I_BADID:
@@ -1738,6 +1747,7 @@ H5Tcopy(hid_t type_id)
         case H5I_ERROR_CLASS:
         case H5I_ERROR_MSG:
         case H5I_ERROR_STACK:
+        case H5I_SPACE_SEL_ITER:
         case H5I_NTYPES:
         default:
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a datatype or dataset")
@@ -1747,11 +1757,18 @@ H5Tcopy(hid_t type_id)
     if(NULL == (new_dt = H5T_copy(dt, H5T_COPY_TRANSIENT)))
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, H5I_INVALID_HID, "unable to copy")
 
-    /* Atomize result */
+    /* Get an ID for the copied datatype */
     if((ret_value = H5I_register(H5I_DATATYPE, new_dt, TRUE)) < 0)
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register datatype atom")
 
 done:
+
+    /* If we got a type ID from a passed-in dataset, we need to close that */
+    if(dset_tid != H5I_INVALID_HID)
+        if(H5I_dec_app_ref(dset_tid) < 0)
+            HGOTO_ERROR(H5E_DATATYPE, H5E_BADATOM, FAIL, "problem freeing temporary dataset type ID")
+
+    /* Close the new datatype on errors */
     if(H5I_INVALID_HID == ret_value)
         if(new_dt && H5T_close_real(new_dt) < 0)
             HDONE_ERROR(H5E_DATATYPE, H5E_CANTRELEASE, H5I_INVALID_HID, "unable to release datatype info")
diff --git a/src/H5Tnative.c b/src/H5Tnative.c
index 3554f75..f40d81b 100644
--- a/src/H5Tnative.c
+++ b/src/H5Tnative.c
@@ -551,6 +551,9 @@ H5T__get_native_integer(size_t prec, H5T_sign_t sign, H5T_direction_t direction,
     FUNC_ENTER_STATIC
 
     if(direction == H5T_DIR_DEFAULT || direction == H5T_DIR_ASCEND) {
+/* Disable warning for intentional identical branches here -QAK */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wduplicated-branches"
         if(prec <= H5T_get_precision((H5T_t *)H5I_object(H5T_NATIVE_SCHAR_g))) {
             match = H5T_NATIVE_INT_MATCH_CHAR;
             native_size = sizeof(char);
@@ -570,6 +573,7 @@ H5T__get_native_integer(size_t prec, H5T_sign_t sign, H5T_direction_t direction,
             match = H5T_NATIVE_INT_MATCH_LLONG;
             native_size = sizeof(long long);
         }
+#pragma GCC diagnostic pop
     } else if(direction == H5T_DIR_DESCEND) {
         if(prec > H5T_get_precision((H5T_t *)H5I_object(H5T_NATIVE_LONG_g))) {
             match = H5T_NATIVE_INT_MATCH_LLONG;
@@ -694,6 +698,9 @@ H5T__get_native_float(size_t size, H5T_direction_t direction, size_t *struct_ali
     HDassert(size>0);
 
     if(direction == H5T_DIR_DEFAULT || direction == H5T_DIR_ASCEND) {
+/* Disable warning for intentional identical branches here -QAK */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wduplicated-branches"
         if(size<=sizeof(float)) {
             match=H5T_NATIVE_FLOAT_MATCH_FLOAT;
 	    native_size = sizeof(float);
@@ -717,6 +724,7 @@ H5T__get_native_float(size_t size, H5T_direction_t direction, size_t *struct_ali
             native_size = sizeof(double);
 #endif
 	}
+#pragma GCC diagnostic pop
     } else {
 #if H5_SIZEOF_LONG_DOUBLE !=0
         if(size>sizeof(double)) {
@@ -810,6 +818,9 @@ H5T__get_native_bitfield(size_t prec, H5T_direction_t direction,
     FUNC_ENTER_STATIC
 
     if(direction == H5T_DIR_DEFAULT || direction == H5T_DIR_ASCEND) {
+/* Disable warning for intentional identical branches here -QAK */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wduplicated-branches"
         if(prec<=H5T_get_precision((H5T_t *)H5I_object(H5T_NATIVE_B8_g))) {
             tid = H5T_NATIVE_B8;
             native_size = 1;
@@ -831,6 +842,7 @@ H5T__get_native_bitfield(size_t prec, H5T_direction_t direction,
             native_size = 8;
             align = H5T_NATIVE_UINT64_ALIGN_g;
         }
+#pragma GCC diagnostic pop
     } else if(direction == H5T_DIR_DESCEND) {
         if(prec>H5T_get_precision((H5T_t *)H5I_object(H5T_NATIVE_B32_g))) {
             tid = H5T_NATIVE_B64;
diff --git a/src/H5VLint.c b/src/H5VLint.c
index 1b735f5..884b2f6 100644
--- a/src/H5VLint.c
+++ b/src/H5VLint.c
@@ -1437,6 +1437,7 @@ H5VL__object(hid_t id, H5I_type_t obj_type)
         case H5I_ERROR_CLASS:
         case H5I_ERROR_MSG:
         case H5I_ERROR_STACK:
+        case H5I_SPACE_SEL_ITER:
         case H5I_NTYPES:
         default:
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "unknown data object type")
diff --git a/src/H5Zshuffle.c b/src/H5Zshuffle.c
index e70ef33..b1d0722 100644
--- a/src/H5Zshuffle.c
+++ b/src/H5Zshuffle.c
@@ -185,18 +185,25 @@ H5Z_filter_shuffle(unsigned flags, size_t cd_nelmts, const unsigned cd_values[],
                         do
                           {
                             DUFF_GUTS
+                            H5_ATTR_FALLTHROUGH
                     case 7:
                             DUFF_GUTS
+                            H5_ATTR_FALLTHROUGH
                     case 6:
                             DUFF_GUTS
+                            H5_ATTR_FALLTHROUGH
                     case 5:
                             DUFF_GUTS
+                            H5_ATTR_FALLTHROUGH
                     case 4:
                             DUFF_GUTS
+                            H5_ATTR_FALLTHROUGH
                     case 3:
                             DUFF_GUTS
+                            H5_ATTR_FALLTHROUGH
                     case 2:
                             DUFF_GUTS
+                            H5_ATTR_FALLTHROUGH
                     case 1:
                             DUFF_GUTS
                       } while (--duffs_index > 0);
@@ -243,18 +250,25 @@ H5Z_filter_shuffle(unsigned flags, size_t cd_nelmts, const unsigned cd_values[],
                         do
                           {
                             DUFF_GUTS
+                            H5_ATTR_FALLTHROUGH
                     case 7:
                             DUFF_GUTS
+                            H5_ATTR_FALLTHROUGH
                     case 6:
                             DUFF_GUTS
+                            H5_ATTR_FALLTHROUGH
                     case 5:
                             DUFF_GUTS
+                            H5_ATTR_FALLTHROUGH
                     case 4:
                             DUFF_GUTS
+                            H5_ATTR_FALLTHROUGH
                     case 3:
                             DUFF_GUTS
+                            H5_ATTR_FALLTHROUGH
                     case 2:
                             DUFF_GUTS
+                            H5_ATTR_FALLTHROUGH
                     case 1:
                             DUFF_GUTS
                       } while (--duffs_index > 0);
diff --git a/src/H5checksum.c b/src/H5checksum.c
index 64d527e..4e98976 100644
--- a/src/H5checksum.c
+++ b/src/H5checksum.c
@@ -407,16 +407,27 @@ H5_checksum_lookup3(const void *key, size_t length, uint32_t initval)
     switch(length)                   /* all the case statements fall through */
     {
         case 12: c+=((uint32_t)k[11])<<24;
+                H5_ATTR_FALLTHROUGH
         case 11: c+=((uint32_t)k[10])<<16;
+                H5_ATTR_FALLTHROUGH
         case 10: c+=((uint32_t)k[9])<<8;
+                H5_ATTR_FALLTHROUGH
         case 9 : c+=k[8];
+                H5_ATTR_FALLTHROUGH
         case 8 : b+=((uint32_t)k[7])<<24;
+                H5_ATTR_FALLTHROUGH
         case 7 : b+=((uint32_t)k[6])<<16;
+                H5_ATTR_FALLTHROUGH
         case 6 : b+=((uint32_t)k[5])<<8;
+                H5_ATTR_FALLTHROUGH
         case 5 : b+=k[4];
+                H5_ATTR_FALLTHROUGH
         case 4 : a+=((uint32_t)k[3])<<24;
+                H5_ATTR_FALLTHROUGH
         case 3 : a+=((uint32_t)k[2])<<16;
+                H5_ATTR_FALLTHROUGH
         case 2 : a+=((uint32_t)k[1])<<8;
+                H5_ATTR_FALLTHROUGH
         case 1 : a+=k[0];
                  break;
         case 0 : goto done;
diff --git a/src/H5private.h b/src/H5private.h
index dad2d94..86cd615 100644
--- a/src/H5private.h
+++ b/src/H5private.h
@@ -309,6 +309,7 @@
 #   define H5_ATTR_NORETURN     /*void*/
 #   define H5_ATTR_CONST        /*void*/
 #   define H5_ATTR_PURE         /*void*/
+#   define H5_ATTR_FALLTHROUGH  /*void*/
 #else /* __cplusplus */
 #if defined(H5_HAVE_ATTRIBUTE) && !defined(__SUNPRO_C)
 #   define H5_ATTR_FORMAT(X,Y,Z)  __attribute__((format(X, Y, Z)))
@@ -316,12 +317,14 @@
 #   define H5_ATTR_NORETURN     __attribute__((noreturn))
 #   define H5_ATTR_CONST        __attribute__((const))
 #   define H5_ATTR_PURE         __attribute__((pure))
+#   define H5_ATTR_FALLTHROUGH  __attribute__((fallthrough));
 #else
 #   define H5_ATTR_FORMAT(X,Y,Z)  /*void*/
 #   define H5_ATTR_UNUSED       /*void*/
 #   define H5_ATTR_NORETURN     /*void*/
 #   define H5_ATTR_CONST        /*void*/
 #   define H5_ATTR_PURE         /*void*/
+#   define H5_ATTR_FALLTHROUGH  /*void*/
 #endif
 #endif /* __cplusplus */
 
diff --git a/src/H5trace.c b/src/H5trace.c
index 9c858fc..c5d14f5 100644
--- a/src/H5trace.c
+++ b/src/H5trace.c
@@ -173,7 +173,7 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
         if(current_depth < last_call_depth) {
             /* We are at the beginning of a line */
             if(H5_debug_g.ttimes) {
-                char tmp[128];
+                char tmp[320];
 
                 HDsprintf(tmp, "%.6f", event_time.etime-first_time.etime);
                 HDfprintf(out, " %*s ", (int)HDstrlen(tmp), "");
diff --git a/test/CMakeTests.cmake b/test/CMakeTests.cmake
index 1e7ddff..3d986d2 100644
--- a/test/CMakeTests.cmake
+++ b/test/CMakeTests.cmake
@@ -867,12 +867,19 @@ set_tests_properties (H5TEST-links_env PROPERTIES
     WORKING_DIRECTORY ${HDF5_TEST_BINARY_DIR}/H5TEST
 )
 
-#-- Adding test for libinfo
-add_test (NAME H5TEST-testlibinfo
-    COMMAND ${CMAKE_COMMAND} -D "TEST_PROGRAM=$<TARGET_FILE:${HDF5_LIB_TARGET}>" -P "${GREP_RUNNER}"
-    WORKING_DIRECTORY
-        ${HDF5_TEST_BINARY_DIR}/H5TEST
-)
+if (NOT BUILD_SHARED_LIBS)
+  #-- Adding test for libinfo
+  add_test (NAME H5TEST-testlibinfo
+      COMMAND ${CMAKE_COMMAND} -D "TEST_PROGRAM=$<TARGET_FILE:${HDF5_LIB_TARGET}>" -P "${GREP_RUNNER}"
+      WORKING_DIRECTORY ${HDF5_TEST_BINARY_DIR}/H5TEST
+  )
+else ()
+  #-- Adding test for libinfo
+  add_test (NAME H5TEST-testlibinfo
+      COMMAND ${CMAKE_COMMAND} -D "TEST_PROGRAM=$<TARGET_FILE:${HDF5_LIBSH_TARGET}>" -P "${GREP_RUNNER}"
+      WORKING_DIRECTORY ${HDF5_TEST_BINARY_DIR}/H5TEST
+  )
+endif ()
 
 ##############################################################################
 ###    F I L T E R  P L U G I N  T E S T S
diff --git a/test/cache_logging.c b/test/cache_logging.c
index 6fd48d8..c43609b 100644
--- a/test/cache_logging.c
+++ b/test/cache_logging.c
@@ -43,7 +43,7 @@ test_logging_api(void)
     hid_t       fid = -1;
     hid_t       gid = -1;
     hbool_t     is_currently_logging;
-    char        group_name[8];
+    char        group_name[12];
     char        filename[1024];
     int         i;
 
@@ -111,8 +111,8 @@ test_logging_api(void)
 
     /* Perform some manipulations */
     for(i = 0; i < N_GROUPS; i++) {
-        HDmemset(group_name, 0, 8);
-        HDsnprintf(group_name, 8, "%d", i);
+        HDmemset(group_name, 0, sizeof(group_name));
+        HDsnprintf(group_name, sizeof(group_name), "%d", i);
         if((gid = H5Gcreate2(fid, group_name, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0)
             TEST_ERROR;
         if(H5Gclose(gid) < 0)
diff --git a/test/cache_tagging.c b/test/cache_tagging.c
index 04fdfce..dd886eb 100644
--- a/test/cache_tagging.c
+++ b/test/cache_tagging.c
@@ -741,7 +741,7 @@ check_multi_group_creation_tags(void)
     hid_t fid = -1;          /* File Identifier */
     hid_t gid = -1;          /* Group Identifier */
     int verbose = FALSE;     /* verbose file outout */
-    char gname[10];          /* group name buffer */
+    char gname[16];          /* group name buffer */
     int i = 0;               /* iterator */
     hid_t fapl = -1;         /* File access prop list */
     haddr_t g_tag = 0;       /* Group tag value */
diff --git a/test/cmpd_dset.c b/test/cmpd_dset.c
index a8baeac..1944ce1 100644
--- a/test/cmpd_dset.c
+++ b/test/cmpd_dset.c
@@ -1808,7 +1808,7 @@ test_pack_ooo(void)
     unsigned    free_order[PACK_NMEMBS]; /* Index of remaining free slots in order */
     unsigned    num_free;           /* Number of free slots in order */
     unsigned    sub_cmpd_order;     /* Order to insert the inner compound */
-    char        name[6];            /* Member name */
+    char        name[16];           /* Member name */
     unsigned    extra_space;        /* Whether to add extra space to the end of
                                      * the compound */
     unsigned    i, j;               /* Indices */
diff --git a/test/direct_chunk.c b/test/direct_chunk.c
index 8de923e..9ea814c 100644
--- a/test/direct_chunk.c
+++ b/test/direct_chunk.c
@@ -2008,11 +2008,11 @@ error:
 static int
 test_single_chunk(unsigned config)
 {
-    hid_t fid;              /* File ID */
-    hid_t fapl;             /* File access property list ID */
-    hid_t sid;              /* Dataspace ID */
-    hid_t did;              /* Dataset ID */
-    hid_t dcpl;             /* Dataset creation property list */
+    hid_t fid = H5I_INVALID_HID;            /* File ID */
+    hid_t fapl = H5I_INVALID_HID;           /* File access property list ID */
+    hid_t sid = H5I_INVALID_HID;            /* Dataspace ID */
+    hid_t did = H5I_INVALID_HID;            /* Dataset ID */
+    hid_t dcpl = H5I_INVALID_HID;           /* Dataset creation property list */
     hsize_t dims[2] = {DIM0, DIM1};         /* Dimension sizes */
     hsize_t chunk[2] = {CHUNK0, CHUNK1};    /* Chunk dimension sizes */
     hsize_t offset[2] = {0,0};              /* Offset for writing */
diff --git a/test/dsets.c b/test/dsets.c
index a317f14..603f785 100644
--- a/test/dsets.c
+++ b/test/dsets.c
@@ -1233,14 +1233,19 @@ test_conv_buffer(hid_t fid)
     CmpField     *cf = NULL;
     CmpFieldR    *cfrR = NULL;
 
-    hid_t       dataset = -1; /* dataset ID             */
-    hid_t       space   = -1; /* data space ID          */
-    hid_t       ctype1, ctype2; /* data type ID           */
-    hid_t       arr_type1, arr_type2, arr_type3, arr_type4, arr_type5;
+    hid_t       dataset = H5I_INVALID_HID; /* dataset ID             */
+    hid_t       space   = H5I_INVALID_HID; /* data space ID          */
+    hid_t       ctype1 = H5I_INVALID_HID,
+                ctype2 = H5I_INVALID_HID; /* data type ID           */
+    hid_t       arr_type1 = H5I_INVALID_HID,
+                arr_type2 = H5I_INVALID_HID,
+                arr_type3 = H5I_INVALID_HID,
+                arr_type4 = H5I_INVALID_HID,
+                arr_type5 = H5I_INVALID_HID;
     hsize_t     dimsa[3];
     hsize_t     dimsb[1];
     hsize_t     dimsc[1];
-    hid_t       xfer_list;
+    hid_t       xfer_list = H5I_INVALID_HID;
     size_t      size;
 
     TESTING("data type conversion buffer size");
@@ -12920,7 +12925,6 @@ test_versionbounds(void)
     hid_t vspace = -1;    /* Virtual dset dataspaces */
     hid_t srcdset = -1;   /* Source datset */
     hid_t vdset = -1;     /* Virtual dataset */
-    hid_t null_dspace = -1;     /* Data space of H5S_NULL */
     hsize_t dims[1] = {3};      /* Data space current size */
     char  srcfilename[FILENAME_BUF_SIZE];
     char  vfilename1[FILENAME_BUF_SIZE];
diff --git a/test/evict_on_close.c b/test/evict_on_close.c
index 9918829..b7d30a9 100644
--- a/test/evict_on_close.c
+++ b/test/evict_on_close.c
@@ -73,7 +73,7 @@ const char *FILENAMES[] = {
 #define SUBGROUP_NAME_SIZE          16
 
 /* Prototypes */
-static hbool_t verify_tag_not_in_cache(H5F_t *f, haddr_t tag);
+static hbool_t verify_tag_not_in_cache(const H5F_t *f, haddr_t tag);
 static herr_t check_evict_on_close_api(void);
 static hid_t generate_eoc_test_file(hid_t fapl_id);
 static herr_t check_dset_scheme(hid_t fid, const char *dset_name);
@@ -90,8 +90,8 @@ static herr_t check_group_layout(hid_t fid, const char *group_name);
  *
  *-------------------------------------------------------------------------
  */
-static hbool_t
-verify_tag_not_in_cache(H5F_t *f, haddr_t tag)
+static H5_ATTR_PURE hbool_t
+verify_tag_not_in_cache(const H5F_t *f, haddr_t tag)
 {
     H5C_t *cache_ptr = NULL;                /* cache pointer                */
     int i = 0;                              /* iterator                     */
diff --git a/test/external_common.h b/test/external_common.h
index cc2b5fb..1e4fe7a 100644
--- a/test/external_common.h
+++ b/test/external_common.h
@@ -33,11 +33,6 @@ static const char *EXT_FNAME[] = {
     NULL
 };
 
-static const char *EXT_ENV_FNAME[] = {
-    "extern_env_dir/env_file_1",
-    NULL
-};
-
 /* A similar collection of files is used for the tests that
  * perform file I/O.
  */
diff --git a/test/external_env.c b/test/external_env.c
index 55f68be..1bf0cf0 100644
--- a/test/external_env.c
+++ b/test/external_env.c
@@ -16,6 +16,11 @@
  */
 #include "external_common.h"
 
+static const char *EXT_ENV_FNAME[] = {
+    "extern_env_dir/env_file_1",
+    NULL
+};
+
 
 /*-------------------------------------------------------------------------
  * Function:    test_path_env
diff --git a/test/fheap.c b/test/fheap.c
index acf5d0b..557fd37 100644
--- a/test/fheap.c
+++ b/test/fheap.c
@@ -7599,7 +7599,7 @@ test_man_incr_insert_remove(hid_t fapl, H5HF_create_t *cparam, fheap_test_param_
     unsigned char heap_id[100][MAX_HEAP_ID_LEN]; /* Heap ID for object inserted */
     struct a_type_t1 {
         char a[10];
-        char b[29];
+        char b[40];
     } obj1, obj2;                       /* Objects to insert/remove */
     size_t      id_len;                 /* Size of fractal heap IDs */
     fheap_heap_state_t state;           /* State of fractal heap */
@@ -7640,14 +7640,14 @@ test_man_incr_insert_remove(hid_t fapl, H5HF_create_t *cparam, fheap_test_param_
      */
     TESTING("incremental object insertion and removal")
 
+    HDmemset(&obj1, 0, sizeof(obj1));
+    HDmemset(&obj2, 0, sizeof(obj2));
     for(i = 0; i < 100; i++) {
-        HDsprintf(obj1.b, "%s%d", "ABCDEFGHIJKLMNOPQRSTUVWXYZ", i);
-
         for(j = 0; j < i; j++) {
-            HDsprintf(obj2.b, "%s%d", "ABCDEFGHIJKLMNOPQRSTUVWXYZ", j);
-
             if(H5HF_remove(fh, heap_id[j]) < 0)
                 FAIL_STACK_ERROR
+
+            HDsprintf(obj2.b, "%s%2d", "ABCDEFGHIJKLMNOPQRSTUVWXYZ", j);
             if(H5HF_insert(fh, (sizeof(obj2)), &obj2, heap_id[j]) < 0)
                 FAIL_STACK_ERROR
         } /* end for */
@@ -7658,6 +7658,7 @@ test_man_incr_insert_remove(hid_t fapl, H5HF_create_t *cparam, fheap_test_param_
 
         /* Insert object */
         HDmemset(heap_id[i], 0, id_len);
+        HDsprintf(obj1.b, "%s%2d", "ABCDEFGHIJKLMNOPQRSTUVWXYZ", i);
         if(H5HF_insert(fh, (sizeof(obj1)), &obj1, heap_id[i]) < 0)
             FAIL_STACK_ERROR
     } /* end for */
diff --git a/test/file_image.c b/test/file_image.c
index 0dba236..86dd13e 100644
--- a/test/file_image.c
+++ b/test/file_image.c
@@ -580,7 +580,7 @@ test_core(void)
     file = H5Fopen(copied_filename, H5F_ACC_RDONLY, fapl);
     VERIFY(file >= 0, "H5Fopen failed");
     VERIFY((udata->used_callbacks == MALLOC) || 
-            (udata->used_callbacks == MALLOC | UDATA_COPY | UDATA_FREE), "opening a core file used the wrong callbacks");
+            (udata->used_callbacks == (MALLOC | UDATA_COPY | UDATA_FREE)), "opening a core file used the wrong callbacks");
     VERIFY(udata->malloc_src == H5FD_FILE_IMAGE_OP_FILE_OPEN, "Malloc callback came from wrong sourc in core open");
 
     /* Close file */
diff --git a/test/flush1.c b/test/flush1.c
index fefa8d0..ac5f9ef 100644
--- a/test/flush1.c
+++ b/test/flush1.c
@@ -73,7 +73,7 @@ create_file(const char *filename, hid_t fapl_id, hbool_t swmr)
     hid_t   fid = -1;               /* file ID                          */
     hid_t   top_gid = -1;           /* containing group ID              */
     hid_t   gid = -1;               /* subgroup ID                      */
-    char    group_name[16];         /* group name                       */
+    char    group_name[32];         /* group name                       */
     unsigned    flags;              /* file open flags                  */
     int     i;                      /* iterator                         */
 
diff --git a/test/flush2.c b/test/flush2.c
index 6e8aee7..8ebfb75 100644
--- a/test/flush2.c
+++ b/test/flush2.c
@@ -135,7 +135,7 @@ file_ok(const char *filename, hid_t fapl_id, hbool_t check_second_dset)
     hid_t   fid = -1;               /* file ID                          */
     hid_t   top_gid = -1;           /* containing group ID              */
     hid_t   gid = -1;               /* subgroup ID                      */
-    char    group_name[16];         /* group name                       */
+    char    group_name[32];         /* group name                       */
     int     i;                      /* iterator                         */
 
     /* open file */
diff --git a/test/hyperslab.c b/test/hyperslab.c
index feb96bd..d8c00c9 100644
--- a/test/hyperslab.c
+++ b/test/hyperslab.c
@@ -819,12 +819,8 @@ test_transpose(size_t nx, size_t ny)
     dst_stride[1] = (hsize_t)(nx * sizeof(*src));
 
     /* Copy and transpose */
-    if(nx == ny)
-        H5VM_stride_copy(2, (hsize_t)sizeof(*src), size, dst_stride, dst,
-                src_stride, src);
-    else
-        H5VM_stride_copy(2, (hsize_t)sizeof(*src), size, dst_stride, dst,
-                src_stride, src);
+    H5VM_stride_copy(2, (hsize_t)sizeof(*src), size, dst_stride, dst,
+            src_stride, src);
 
     /* Check */
     for(i = 0; i < nx; i++) {
diff --git a/test/links.c b/test/links.c
index 520f784..3166954 100644
--- a/test/links.c
+++ b/test/links.c
@@ -7759,6 +7759,7 @@ done:
             case H5I_ERROR_CLASS:
             case H5I_ERROR_MSG:
             case H5I_ERROR_STACK:
+            case H5I_SPACE_SEL_ITER:
             case H5I_NTYPES:
             default:
               return -1;
@@ -7847,6 +7848,7 @@ done:
             case H5I_ERROR_CLASS:
             case H5I_ERROR_MSG:
             case H5I_ERROR_STACK:
+            case H5I_SPACE_SEL_ITER:
             case H5I_NTYPES:
             default:
                 return -1;
diff --git a/test/page_buffer.c b/test/page_buffer.c
index b9b31f8..e11a6d6 100644
--- a/test/page_buffer.c
+++ b/test/page_buffer.c
@@ -98,7 +98,7 @@ create_file(char *filename, hid_t fcpl, hid_t fapl)
     int         i;
     int         num_elements;
     int         j;
-    char        dset_name[10];
+    char        dset_name[32];
 
     if((file_id = H5Fcreate(filename, H5F_ACC_TRUNC, fcpl, fapl)) < 0)
         FAIL_STACK_ERROR;
@@ -235,7 +235,7 @@ open_file(char *filename, hid_t fapl, hsize_t page_size,
     int         i;
     int         j;
     int         num_elements;
-    char        dset_name[10];
+    char        dset_name[32];
     H5F_t       *f = NULL;
 
     if((file_id = H5Fopen(filename, H5F_ACC_RDONLY, fapl)) < 0)
diff --git a/test/tattr.c b/test/tattr.c
index b83ed9f..c7a2c23 100644
--- a/test/tattr.c
+++ b/test/tattr.c
@@ -10065,7 +10065,7 @@ test_attr_bug2(hid_t fcpl, hid_t fapl)
     hid_t   tid;            /* Datatype ID */
     hid_t   gcpl;           /* Group creation property list */
     hsize_t dims[2] = {10, 100}; /* Attribute dimensions */
-    char    aname[4];       /* Attribute name */
+    char    aname[16];       /* Attribute name */
     unsigned i;             /* index */
     herr_t  ret;            /* Generic return status */
     htri_t  tri_ret;        /* htri_t return status */
diff --git a/test/tfile.c b/test/tfile.c
index 140bd14..c15064a 100644
--- a/test/tfile.c
+++ b/test/tfile.c
@@ -1446,6 +1446,7 @@ test_obj_count_and_id(hid_t fid1, hid_t fid2, hid_t did, hid_t gid1,
                     case H5I_ERROR_CLASS:
                     case H5I_ERROR_MSG:
                     case H5I_ERROR_STACK:
+                    case H5I_SPACE_SEL_ITER:
                     case H5I_NTYPES:
                     default:
                         ERROR("H5Fget_obj_ids");
diff --git a/test/th5s.c b/test/th5s.c
index 6632a4c..c5dfa97 100644
--- a/test/th5s.c
+++ b/test/th5s.c
@@ -30,6 +30,7 @@
  * This file also needs to access the dataspace testing code.
  */
 #define H5S_FRIEND      /*suppress error about including H5Spkg   */
+#define H5S_TESTING	/*suppress warning about H5S testing funcs*/
 #include "H5Spkg.h"     /* Dataspaces               */
 
 /*
diff --git a/test/tselect.c b/test/tselect.c
index d912df5..ad435cb 100644
--- a/test/tselect.c
+++ b/test/tselect.c
@@ -10546,7 +10546,7 @@ test_shape_same_dr__full_space_vs_slice(int test_num,
                                         hbool_t expected_result)
 {
     char	test_desc_0[128];
-    char	test_desc_1[128];
+    char	test_desc_1[256];
     int         i;
     hid_t	n_cube_0_sid;  /* the fully selected hyper cube */
     hid_t	n_cube_1_sid;  /* the hyper cube in which a slice is selected */
@@ -10831,7 +10831,7 @@ test_shape_same_dr__checkerboard(int test_num,
                                  hbool_t expected_result)
 {
     char	test_desc_0[128];
-    char	test_desc_1[128];
+    char	test_desc_1[256];
     int         i;
     int		dims_selected = 0;
     hid_t	n_cube_0_sid;  /* the checker board selected
@@ -11443,7 +11443,7 @@ test_shape_same_dr__irregular(int test_num,
                               hbool_t expected_result)
 {
     char	test_desc_0[128];
-    char	test_desc_1[128];
+    char	test_desc_1[256];
     int		edge_size = 10;
     int         i;
     int         j;
diff --git a/testpar/t_filters_parallel.c b/testpar/t_filters_parallel.c
index 1f26e0d..76f9276 100644
--- a/testpar/t_filters_parallel.c
+++ b/testpar/t_filters_parallel.c
@@ -3683,6 +3683,8 @@ test_read_filtered_dataset_point_selection(void)
     if (read_buf) HDfree(read_buf);
     if (correct_buf) HDfree(correct_buf);
 
+    HDfree(coords);
+
     VRFY((H5Dclose(dset_id) >= 0), "Dataset close succeeded");
     VRFY((H5Sclose(filespace) >= 0), "File dataspace close succeeded");
     VRFY((H5Sclose(memspace) >= 0), "Memory dataspace close succeeded");
@@ -5791,6 +5793,9 @@ test_write_parallel_read_serial(void)
 
         VRFY((H5Dclose(dset_id) >= 0), "Dataset close succeeded");
         VRFY((H5Fclose(file_id) >= 0), "File close succeeded");
+
+        HDfree(correct_buf);
+        HDfree(read_buf);
     }
 
     return;
@@ -5808,7 +5813,7 @@ test_write_parallel_read_serial(void)
 static void
 test_shrinking_growing_chunks(void)
 {
-    float   *data = NULL;
+    double  *data = NULL;
     hsize_t  dataset_dims[SHRINKING_GROWING_CHUNKS_DATASET_DIMS];
     hsize_t  chunk_dims[SHRINKING_GROWING_CHUNKS_DATASET_DIMS];
     hsize_t  sel_dims[SHRINKING_GROWING_CHUNKS_DATASET_DIMS];
@@ -5903,9 +5908,9 @@ test_shrinking_growing_chunks(void)
     VRFY((H5Pset_dxpl_mpio(plist_id, H5FD_MPIO_COLLECTIVE) >= 0),
             "Set DXPL MPIO succeeded");
 
-    data_size = sel_dims[0] * sel_dims[1] * sizeof(*data);
+    data_size = sel_dims[0] * sel_dims[1] * sizeof(double);
 
-    data = (float *) HDcalloc(1, data_size);
+    data = (double *) HDcalloc(1, data_size);
     VRFY((NULL != data), "HDcalloc succeeded");
 
     for (i = 0; i < SHRINKING_GROWING_CHUNKS_NLOOPS; i++) {
diff --git a/tools/lib/h5diff.c b/tools/lib/h5diff.c
index 594bf51..3ee5393 100644
--- a/tools/lib/h5diff.c
+++ b/tools/lib/h5diff.c
@@ -1344,7 +1344,6 @@ diff_match(hid_t file1_id, const char *grp1, trav_info_t *info1,
     }
 #endif /* H5_HAVE_PARALLEL */
 
-out:
     opts->err_stat = opts->err_stat | ret_value;
 
 /* free table */
diff --git a/tools/lib/h5diff_array.c b/tools/lib/h5diff_array.c
index 9d5f062..0169131 100644
--- a/tools/lib/h5diff_array.c
+++ b/tools/lib/h5diff_array.c
@@ -783,12 +783,11 @@ static hsize_t diff_datum(
                 }
 
                 /* check object type */
-                if (ret_value >= 0)
-                    if (obj1_type != obj2_type) {
-                        parallel_print("Different object types referenced: <%s> and <%s>", obj1, obj2);
-                        opts->not_cmp = 1;
-                        HGOTO_DONE (opts->err_stat);
-                    }
+                if (obj1_type != obj2_type) {
+                    parallel_print("Different object types referenced: <%s> and <%s>", obj1, obj2);
+                    opts->not_cmp = 1;
+                    HGOTO_DONE (opts->err_stat);
+                }
 
                 if ((obj1_id = H5Rdereference2(container1_id, H5P_DEFAULT, H5R_OBJECT, _mem1)) < 0) {
                     opts->err_stat = 1;
diff --git a/tools/src/h5repack/h5repack.c b/tools/src/h5repack/h5repack.c
index a63e56f..e96dea5 100644
--- a/tools/src/h5repack/h5repack.c
+++ b/tools/src/h5repack/h5repack.c
@@ -713,7 +713,7 @@ static int check_objects(const char* fname, pack_opt_t *options) {
     hid_t         did = -1;
     hid_t         sid = -1;
     unsigned int  i;
-    unsigned int  uf;
+    int  ifil;
     trav_table_t *travt = NULL;
 
     /* nothing to do */
@@ -747,7 +747,7 @@ static int check_objects(const char* fname, pack_opt_t *options) {
      */
 
     if (options->verbose)
-        printf("Opening file. Searching %d objects to modify ...\n", travt->nobjs);
+        printf("Opening file. Searching %zu objects to modify ...\n", travt->nobjs);
 
     for (i = 0; i < options->op_tbl->nelems; i++) {
         char* name = options->op_tbl->objs[i].path;
@@ -761,17 +761,17 @@ static int check_objects(const char* fname, pack_opt_t *options) {
         if (options->verbose)
             printf("...Found\n");
 
-        for (uf = 0; uf < options->op_tbl->objs[i].nfilters; uf++) {
-            if (options->op_tbl->objs[i].filter[uf].filtn < 0)
+        for (ifil = 0; ifil < options->op_tbl->objs[i].nfilters; ifil++) {
+            if (options->op_tbl->objs[i].filter[ifil].filtn < 0)
                 HGOTO_ERROR(FAIL, H5E_tools_min_id_g, "invalid filter");
             /* check for extra filter conditions */
-            switch (options->op_tbl->objs[i].filter[uf].filtn) {
+            switch (options->op_tbl->objs[i].filter[ifil].filtn) {
             /* chunk size must be smaller than pixels per block */
             case H5Z_FILTER_SZIP:
                 {
                     int j;
                     hsize_t csize = 1;
-                    unsigned ppb = options->op_tbl->objs[i].filter[uf].cd_values[0];
+                    unsigned ppb = options->op_tbl->objs[i].filter[ifil].cd_values[0];
                     hsize_t dims[H5S_MAX_RANK];
                     int rank;
 
@@ -807,7 +807,7 @@ static int check_objects(const char* fname, pack_opt_t *options) {
             default:
                 break;
             }
-        } /* for uf */
+        } /* for ifil */
     } /* for i */
 
 done:
diff --git a/tools/src/h5repack/h5repack_copy.c b/tools/src/h5repack/h5repack_copy.c
index 0567269..8122d6d 100644
--- a/tools/src/h5repack/h5repack_copy.c
+++ b/tools/src/h5repack/h5repack_copy.c
@@ -33,20 +33,6 @@
 /* size of buffer/# of bytes to xfer at a time when copying userblock */
 #define USERBLOCK_XFER_SIZE     512
 
-/* check H5Dread()/H5Dwrite() error, e.g. memory allocation error inside the library. */
-#define CHECK_H5DRW_ERROR(_fun, _fail, _did, _mtid, _msid, _fsid, _pid, _buf)  {  \
-    H5E_BEGIN_TRY {  \
-        if(_fun(_did, _mtid, _msid, _fsid, _pid, _buf) < 0) {  \
-            hid_t _err_num = 0; \
-            char _msg[80]; \
-            H5Ewalk2(H5E_DEFAULT, H5E_WALK_DOWNWARD, walk_error_callback, &_err_num); \
-            H5Eget_msg(_err_num, NULL, _msg, (size_t)80); \
-            error_msg("%s %s -- %s\n", #_fun, "failed", _msg); \
-            HGOTO_DONE(_fail) \
-        } \
-    } H5E_END_TRY; \
-}
-
 /*-------------------------------------------------------------------------
  * local functions
  *-------------------------------------------------------------------------
@@ -61,15 +47,7 @@ static int copy_user_block(const char *infile, const char *outfile,
 #if defined (H5REPACK_DEBUG_USER_BLOCK)
 static void print_user_block(const char *filename, hid_t fid);
 #endif
-static herr_t walk_error_callback(unsigned n, const H5E_error2_t *err_desc, void *udata);
 
-/* get the major number from the error stack. */
-static herr_t walk_error_callback(H5_ATTR_UNUSED unsigned n, const H5E_error2_t *err_desc, void *udata) {
-    if (err_desc)
-        *((hid_t *) udata) = err_desc->maj_num;
-
-    return 0;
-}
 
 /*-------------------------------------------------------------------------
  * Function: copy_objects
@@ -634,7 +612,7 @@ int do_copy_objects(hid_t fidin, hid_t fidout, trav_table_t *travt,
     unsigned crt_order_flags; /* group creation order flag */
     unsigned i;
     unsigned u;
-    unsigned uf;
+    int ifil;
     int is_ref = 0;
     htri_t is_named;
     hbool_t limit_maxdims;
@@ -740,8 +718,8 @@ int do_copy_objects(hid_t fidin, hid_t fidout, trav_table_t *travt,
                 if (options->op_tbl->objs) {
                     for (u = 0; u < options->op_tbl->nelems; u++) {
                         if (HDstrcmp(travt->objs[i].name, options->op_tbl->objs[u].path) == 0)
-                            for (uf = 0; uf < options->op_tbl->objs[uf].nfilters; uf++) {
-                                if (options->op_tbl->objs[u].filter[uf].filtn > 0)
+                            for (ifil = 0; ifil < options->op_tbl->objs[ifil].nfilters; ifil++) {
+                                if (options->op_tbl->objs[u].filter[ifil].filtn > 0)
                                     req_filter = 1;
                             }
                     }
@@ -1350,7 +1328,7 @@ print_dataset_info(hid_t dcpl_id, char *objname, double ratio, int pr)
     if (!pr)
         printf(FORMAT_OBJ, "dset", objname);
     else {
-        char str[255], temp[28];
+        char str[512], temp[512];
 
         HDstrcpy(str, "dset     ");
         HDstrcat(str, strfilter);
diff --git a/tools/src/h5repack/h5repack_filters.c b/tools/src/h5repack/h5repack_filters.c
index 3d9472a..7e32def 100644
--- a/tools/src/h5repack/h5repack_filters.c
+++ b/tools/src/h5repack/h5repack_filters.c
@@ -42,7 +42,8 @@ static int aux_copy_obj(hid_t dcpl_id, /* dataset creation property list */
     H5D_layout_t layout;
     int          rank;           /* rank of dataset */
     hsize_t      chsize[64];     /* chunk size in elements */
-    unsigned int i;
+    int i;
+    unsigned u;
 
     /* get information about input filters */
     if ((nfilters = H5Pget_nfilters(dcpl_id)) < 0)
@@ -65,8 +66,8 @@ static int aux_copy_obj(hid_t dcpl_id, /* dataset creation property list */
         if ((rank = H5Pget_chunk(dcpl_id, NELMTS(chsize), chsize/*out*/)) < 0)
             HGOTO_ERROR(FAIL, H5E_tools_min_id_g, "H5Pget_chunk failed");
         objout->chunk.rank = rank;
-        for (i = 0; i < rank; i++)
-            objout->chunk.chunk_lengths[i] = chsize[i];
+        for (u = 0; u < (unsigned)rank; u++)
+            objout->chunk.chunk_lengths[u] = chsize[u];
     }
 
 done:
@@ -85,8 +86,7 @@ static int aux_find_obj(const char* name, /* object name from traverse list */
         pack_info_t *obj                  /*OUT*/) /* info about object to filter */
 {
     char         *pdest = NULL;
-    char         *pname = NULL;
-    int          result;
+    const char   *pname = NULL;
     unsigned int i;
 
     for (i = 0; i < options->op_tbl->nelems; i++) {
diff --git a/tools/src/h5stat/h5stat.c b/tools/src/h5stat/h5stat.c
index 8109b93..450f731 100644
--- a/tools/src/h5stat/h5stat.c
+++ b/tools/src/h5stat/h5stat.c
@@ -509,8 +509,7 @@ dataset_stats(iter_t *iter, const char *name, const H5O_info_t *oi)
         HGOTO_ERROR(FAIL, H5E_tools_min_id_g, "attribute_stats() failed");
 
     /* Get storage info */
-    if((storage = H5Dget_storage_size(did)) < 0)
-        HGOTO_ERROR(FAIL, H5E_tools_min_id_g, "H5Dget_storage_size() failed");
+    storage = H5Dget_storage_size(did);
 
     /* Gather layout statistics */
     if((dcpl = H5Dget_create_plist(did)) < 0)
diff --git a/tools/test/h5copy/CMakeLists.txt b/tools/test/h5copy/CMakeLists.txt
index 57c8fc6..ecf371f 100644
--- a/tools/test/h5copy/CMakeLists.txt
+++ b/tools/test/h5copy/CMakeLists.txt
@@ -18,15 +18,15 @@ endif ()
 # If plugin library tests can be tested
 #-----------------------------------------------------------------------------
 if (BUILD_SHARED_LIBS)
-  set (HDF5_TOOL_PLUGIN_LIB_CORENAME         "dynlibcopy")
-  set (HDF5_TOOL_PLUGIN_LIB_NAME             "${HDF5_EXTERNAL_LIB_PREFIX}${HDF5_TOOL_PLUGIN_LIB_CORENAME}")
-  set (HDF5_TOOL_PLUGIN_LIB_TARGET           ${HDF5_TOOL_PLUGIN_LIB_CORENAME})
+  set (H5COPY_TOOL_PLUGIN_LIB_CORENAME         "dynlibcopy")
+  set (H5COPY_TOOL_PLUGIN_LIB_NAME             "${HDF5_EXTERNAL_LIB_PREFIX}${H5COPY_TOOL_PLUGIN_LIB_CORENAME}")
+  set (H5COPY_TOOL_PLUGIN_LIB_TARGET           ${H5COPY_TOOL_PLUGIN_LIB_CORENAME})
 
-  add_library (${HDF5_TOOL_PLUGIN_LIB_TARGET} SHARED dynlib_copy.c)
-  target_include_directories (${HDF5_TOOL_PLUGIN_LIB_TARGET} PRIVATE "${HDF5_SRC_DIR};${HDF5_BINARY_DIR};$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_INCLUDE_DIRS}>")
-  TARGET_C_PROPERTIES (${HDF5_TOOL_PLUGIN_LIB_TARGET} SHARED)
-  target_link_libraries (${HDF5_TOOL_PLUGIN_LIB_TARGET} PRIVATE ${HDF5_TEST_LIBSH_TARGET})
-  H5_SET_LIB_OPTIONS (${HDF5_TOOL_PLUGIN_LIB_TARGET} ${HDF5_TOOL_PLUGIN_LIB_NAME} SHARED "LIB")
+  add_library (${H5COPY_TOOL_PLUGIN_LIB_TARGET} SHARED dynlib_copy.c)
+  target_include_directories (${H5COPY_TOOL_PLUGIN_LIB_TARGET} PRIVATE "${HDF5_SRC_DIR};${HDF5_BINARY_DIR};$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_INCLUDE_DIRS}>")
+  TARGET_C_PROPERTIES (${H5COPY_TOOL_PLUGIN_LIB_TARGET} SHARED)
+  target_link_libraries (${H5COPY_TOOL_PLUGIN_LIB_TARGET} PRIVATE ${HDF5_TEST_LIBSH_TARGET})
+  H5_SET_LIB_OPTIONS (${H5COPY_TOOL_PLUGIN_LIB_TARGET} ${H5COPY_TOOL_PLUGIN_LIB_NAME} SHARED "LIB")
 
   # make plugins dir
   file (MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/plugins")
@@ -34,12 +34,12 @@ if (BUILD_SHARED_LIBS)
   # Copy plugin library to a plugins folder
   #-----------------------------------------------------------------------------
   add_custom_command (
-      TARGET     ${HDF5_TOOL_PLUGIN_LIB_TARGET}
+      TARGET     ${H5COPY_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}>"
+          "$<TARGET_FILE:${H5COPY_TOOL_PLUGIN_LIB_TARGET}>"
+          "${CMAKE_BINARY_DIR}/plugins/$<TARGET_FILE_NAME:${H5COPY_TOOL_PLUGIN_LIB_TARGET}>"
   )
 endif ()
 
diff --git a/tools/test/h5copy/CMakeTests.cmake b/tools/test/h5copy/CMakeTests.cmake
index 856aa72..df56f1a 100644
--- a/tools/test/h5copy/CMakeTests.cmake
+++ b/tools/test/h5copy/CMakeTests.cmake
@@ -291,6 +291,7 @@
                 -D "TEST_APPEND=EXIT CODE:"
                 -D "TEST_ENV_VAR=HDF5_PLUGIN_PATH"
                 -D "TEST_ENV_VALUE=${CMAKE_BINARY_DIR}"
+                -D "TEST_LIBRARY_DIRECTORY=${CMAKE_TEST_OUTPUT_DIRECTORY}"
                 -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
         )
       else ()
@@ -306,6 +307,7 @@
                 -D "TEST_APPEND=EXIT CODE:"
                 -D "TEST_ENV_VAR=HDF5_PLUGIN_PATH"
                 -D "TEST_ENV_VALUE=${CMAKE_BINARY_DIR}/plugins"
+                -D "TEST_LIBRARY_DIRECTORY=${CMAKE_TEST_OUTPUT_DIRECTORY}"
                 -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
         )
       endif ()
@@ -322,6 +324,7 @@
               -D "TEST_APPEND=EXIT CODE:"
               -D "TEST_ENV_VAR=HDF5_PLUGIN_PATH"
               -D "TEST_ENV_VALUE=${CMAKE_BINARY_DIR}/plugins"
+              -D "TEST_LIBRARY_DIRECTORY=${CMAKE_TEST_OUTPUT_DIRECTORY}"
               -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
       )
       set_tests_properties (H5COPY_UD-${testname}-DIFF PROPERTIES DEPENDS H5COPY_UD-${testname})
@@ -355,6 +358,7 @@
                 -D "TEST_APPEND=EXIT CODE:"
                 -D "TEST_ENV_VAR=HDF5_PLUGIN_PATH"
                 -D "TEST_ENV_VALUE=${CMAKE_BINARY_DIR}"
+                -D "TEST_LIBRARY_DIRECTORY=${CMAKE_TEST_OUTPUT_DIRECTORY}"
                 -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
         )
       else ()
@@ -371,6 +375,7 @@
                 -D "TEST_APPEND=EXIT CODE:"
                 -D "TEST_ENV_VAR=HDF5_PLUGIN_PATH"
                 -D "TEST_ENV_VALUE=${CMAKE_BINARY_DIR}/plugins"
+                -D "TEST_LIBRARY_DIRECTORY=${CMAKE_TEST_OUTPUT_DIRECTORY}"
                 -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
         )
       endif ()
@@ -387,6 +392,7 @@
               -D "TEST_APPEND=EXIT CODE:"
               -D "TEST_ENV_VAR=HDF5_PLUGIN_PATH"
               -D "TEST_ENV_VALUE=${CMAKE_BINARY_DIR}/plugins"
+              -D "TEST_LIBRARY_DIRECTORY=${CMAKE_TEST_OUTPUT_DIRECTORY}"
               -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
       )
       set_tests_properties (H5COPY_UD_ERR-${testname}-DIFF PROPERTIES DEPENDS H5COPY_UD_ERR-${testname})
diff --git a/tools/test/h5diff/CMakeLists.txt b/tools/test/h5diff/CMakeLists.txt
index b01cbc4..0a874ec 100644
--- a/tools/test/h5diff/CMakeLists.txt
+++ b/tools/test/h5diff/CMakeLists.txt
@@ -18,15 +18,15 @@ endif ()
 # If plugin library tests can be tested
 #-----------------------------------------------------------------------------
 if (BUILD_SHARED_LIBS)
-  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           ${HDF5_TOOL_PLUGIN_LIB_CORENAME})
+  set (H5DIFF_TOOL_PLUGIN_LIB_CORENAME         "dynlibdiff")
+  set (H5DIFF_TOOL_PLUGIN_LIB_NAME             "${HDF5_EXTERNAL_LIB_PREFIX}${H5DIFF_TOOL_PLUGIN_LIB_CORENAME}")
+  set (H5DIFF_TOOL_PLUGIN_LIB_TARGET           ${H5DIFF_TOOL_PLUGIN_LIB_CORENAME})
 
-  add_library (${HDF5_TOOL_PLUGIN_LIB_TARGET} SHARED dynlib_diff.c)
-  target_include_directories (${HDF5_TOOL_PLUGIN_LIB_TARGET} PRIVATE "${HDF5_SRC_DIR};${HDF5_BINARY_DIR};$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_INCLUDE_DIRS}>")
-  TARGET_C_PROPERTIES (${HDF5_TOOL_PLUGIN_LIB_TARGET} SHARED)
-  target_link_libraries (${HDF5_TOOL_PLUGIN_LIB_TARGET} PRIVATE ${HDF5_TEST_LIBSH_TARGET})
-  H5_SET_LIB_OPTIONS (${HDF5_TOOL_PLUGIN_LIB_TARGET} ${HDF5_TOOL_PLUGIN_LIB_NAME} SHARED "LIB")
+  add_library (${H5DIFF_TOOL_PLUGIN_LIB_TARGET} SHARED dynlib_diff.c)
+  target_include_directories (${H5DIFF_TOOL_PLUGIN_LIB_TARGET} PRIVATE "${HDF5_SRC_DIR};${HDF5_BINARY_DIR};$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_INCLUDE_DIRS}>")
+  TARGET_C_PROPERTIES (${H5DIFF_TOOL_PLUGIN_LIB_TARGET} SHARED)
+  target_link_libraries (${H5DIFF_TOOL_PLUGIN_LIB_TARGET} PRIVATE ${HDF5_TEST_LIBSH_TARGET})
+  H5_SET_LIB_OPTIONS (${H5DIFF_TOOL_PLUGIN_LIB_TARGET} ${H5DIFF_TOOL_PLUGIN_LIB_NAME} SHARED "LIB")
 
   # make plugins dir
   file (MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/plugins")
@@ -34,12 +34,12 @@ if (BUILD_SHARED_LIBS)
   # Copy plugin library to a plugins folder
   #-----------------------------------------------------------------------------
   add_custom_command (
-      TARGET     ${HDF5_TOOL_PLUGIN_LIB_TARGET}
+      TARGET     ${H5DIFF_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}>"
+          "$<TARGET_FILE:${H5DIFF_TOOL_PLUGIN_LIB_TARGET}>"
+          "${CMAKE_BINARY_DIR}/plugins/$<TARGET_FILE_NAME:${H5DIFF_TOOL_PLUGIN_LIB_TARGET}>"
   )
 endif ()
 
diff --git a/tools/test/h5diff/CMakeTests.cmake b/tools/test/h5diff/CMakeTests.cmake
index bbde8f4..604c8a5 100644
--- a/tools/test/h5diff/CMakeTests.cmake
+++ b/tools/test/h5diff/CMakeTests.cmake
@@ -463,6 +463,7 @@
                 -D "TEST_APPEND=EXIT CODE:"
                 -D "TEST_ENV_VAR=HDF5_PLUGIN_PATH"
                 -D "TEST_ENV_VALUE=${CMAKE_BINARY_DIR}"
+                -D "TEST_LIBRARY_DIRECTORY=${CMAKE_TEST_OUTPUT_DIRECTORY}"
                 -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
         )
       else ()
@@ -478,6 +479,7 @@
                 -D "TEST_APPEND=EXIT CODE:"
                 -D "TEST_ENV_VAR=HDF5_PLUGIN_PATH"
                 -D "TEST_ENV_VALUE=${CMAKE_BINARY_DIR}/plugins"
+                -D "TEST_LIBRARY_DIRECTORY=${CMAKE_TEST_OUTPUT_DIRECTORY}"
                 -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
         )
       endif ()
diff --git a/tools/test/h5dump/CMakeLists.txt b/tools/test/h5dump/CMakeLists.txt
index df90ed4..1672774 100644
--- a/tools/test/h5dump/CMakeLists.txt
+++ b/tools/test/h5dump/CMakeLists.txt
@@ -5,15 +5,15 @@ project (HDF5_TOOLS_TEST_H5DUMP C)
 # If plugin library tests can be tested
 #-----------------------------------------------------------------------------
 if (BUILD_SHARED_LIBS)
-  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           ${HDF5_TOOL_PLUGIN_LIB_CORENAME})
+  set (H5DUMP_TOOL_PLUGIN_LIB_CORENAME         "dynlibdump")
+  set (H5DUMP_TOOL_PLUGIN_LIB_NAME             "${HDF5_EXTERNAL_LIB_PREFIX}${H5DUMP_TOOL_PLUGIN_LIB_CORENAME}")
+  set (H5DUMP_TOOL_PLUGIN_LIB_TARGET           ${H5DUMP_TOOL_PLUGIN_LIB_CORENAME})
 
-  add_library (${HDF5_TOOL_PLUGIN_LIB_TARGET} SHARED dynlib_dump.c)
-  target_include_directories (${HDF5_TOOL_PLUGIN_LIB_TARGET} PRIVATE "${HDF5_SRC_DIR};${HDF5_BINARY_DIR};$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_INCLUDE_DIRS}>")
-  TARGET_C_PROPERTIES (${HDF5_TOOL_PLUGIN_LIB_TARGET} SHARED)
-  target_link_libraries (${HDF5_TOOL_PLUGIN_LIB_TARGET} PRIVATE ${HDF5_TEST_LIBSH_TARGET})
-  H5_SET_LIB_OPTIONS (${HDF5_TOOL_PLUGIN_LIB_TARGET} ${HDF5_TOOL_PLUGIN_LIB_NAME} SHARED "LIB")
+  add_library (${H5DUMP_TOOL_PLUGIN_LIB_TARGET} SHARED dynlib_dump.c)
+  target_include_directories (${H5DUMP_TOOL_PLUGIN_LIB_TARGET} PRIVATE "${HDF5_SRC_DIR};${HDF5_BINARY_DIR};$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_INCLUDE_DIRS}>")
+  TARGET_C_PROPERTIES (${H5DUMP_TOOL_PLUGIN_LIB_TARGET} SHARED)
+  target_link_libraries (${H5DUMP_TOOL_PLUGIN_LIB_TARGET} PRIVATE ${HDF5_TEST_LIBSH_TARGET})
+  H5_SET_LIB_OPTIONS (${H5DUMP_TOOL_PLUGIN_LIB_TARGET} ${H5DUMP_TOOL_PLUGIN_LIB_NAME} SHARED "LIB")
 
   # make plugins dir
   file (MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/plugins")
@@ -21,12 +21,12 @@ if (BUILD_SHARED_LIBS)
   # Copy plugin library to a plugins folder
   #-----------------------------------------------------------------------------
   add_custom_command (
-      TARGET     ${HDF5_TOOL_PLUGIN_LIB_TARGET}
+      TARGET     ${H5DUMP_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}>"
+            "$<TARGET_FILE:${H5DUMP_TOOL_PLUGIN_LIB_TARGET}>"
+            "${CMAKE_BINARY_DIR}/plugins/$<TARGET_FILE_NAME:${H5DUMP_TOOL_PLUGIN_LIB_TARGET}>"
   )
 endif ()
 
diff --git a/tools/test/h5dump/CMakeTests.cmake b/tools/test/h5dump/CMakeTests.cmake
index eb55b29..13d71a6 100644
--- a/tools/test/h5dump/CMakeTests.cmake
+++ b/tools/test/h5dump/CMakeTests.cmake
@@ -785,6 +785,7 @@
               -D "TEST_REFERENCE=${resultfile}.ddl"
               -D "TEST_ENV_VAR=HDF5_PLUGIN_PATH"
               -D "TEST_ENV_VALUE=${CMAKE_BINARY_DIR}/plugins"
+              -D "TEST_LIBRARY_DIRECTORY=${CMAKE_TEST_OUTPUT_DIRECTORY}"
               -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
       )
       set_tests_properties (H5DUMP_UD-${testname} PROPERTIES DEPENDS H5DUMP_UD-${testname}-clear-objects)
diff --git a/tools/test/h5dump/h5dumpgentest.c b/tools/test/h5dump/h5dumpgentest.c
index 946ca04..3a414d1 100644
--- a/tools/test/h5dump/h5dumpgentest.c
+++ b/tools/test/h5dump/h5dumpgentest.c
@@ -1889,7 +1889,7 @@ static void gent_str2(void)
 
 
     int i;
-    char buf[LENSTR+10];
+    char buf[LENSTR+20];
     char buf2[3*LENSTR2];
     hsize_t sdim;
 
@@ -1941,7 +1941,7 @@ static void gent_str2(void)
 
     for(i = 0; (hsize_t)i < sdim; i++) {
         start[0] = (hsize_t)i;
-        sprintf(buf, "This is row %1d of type H5T_STR_NULLTERM of", i);
+        sprintf(buf, "This is row %d of type H5T_STR_NULLTERM of", i);
         H5Tset_size(memtype, HDstrlen(buf)+1);
         H5Sselect_hyperslab(hyper_space, H5S_SELECT_SET, start, stride, count, block);
         H5Dwrite(dataset, memtype, mem_space, hyper_space, H5P_DEFAULT, buf);
@@ -1954,7 +1954,7 @@ static void gent_str2(void)
 
     for(i = 0; (hsize_t)i < sdim; i++) {
         start[0] = (hsize_t)i;
-        sprintf(buf, "This is row %1d of type H5T_STR_NULLTERM of string array", i);
+        sprintf(buf, "This is row %d of type H5T_STR_NULLTERM of string array", i);
         H5Tset_size(memtype, HDstrlen(buf)+1);
         H5Sselect_hyperslab(hyper_space, H5S_SELECT_SET, start, stride, count, block);
         H5Dwrite(dataset, memtype, mem_space, hyper_space, H5P_DEFAULT, buf);
@@ -1974,7 +1974,7 @@ static void gent_str2(void)
 
     for(i = 0;(hsize_t) i < sdim; i++) {
         start[0] = (hsize_t)i;
-        sprintf(buf, "This is row %1d of type H5T_STR_NULLPAD of", i);
+        sprintf(buf, "This is row %d of type H5T_STR_NULLPAD of", i);
         H5Tset_size(memtype, HDstrlen(buf)+1);
         H5Sselect_hyperslab(hyper_space, H5S_SELECT_SET, start, stride, count, block);
         H5Dwrite(dataset, memtype, mem_space, hyper_space, H5P_DEFAULT, buf);
@@ -1988,7 +1988,7 @@ static void gent_str2(void)
 
     for(i = 0; (hsize_t)i < sdim; i++) {
         start[0] = (hsize_t)i;
-        sprintf(buf, "This is row %1d of type H5T_STR_NULLPAD of string array", i);
+        sprintf(buf, "This is row %d of type H5T_STR_NULLPAD of string array", i);
         H5Tset_size(memtype, HDstrlen(buf)+1);
         H5Sselect_hyperslab(hyper_space, H5S_SELECT_SET, start, stride, count, block);
         H5Dwrite(dataset, memtype, mem_space, hyper_space, H5P_DEFAULT, buf);
@@ -2007,7 +2007,7 @@ static void gent_str2(void)
 
     for(i = 0; (hsize_t)i < sdim; i++) {
         start[0] = (hsize_t)i;
-        sprintf(buf, "This is row %1d of type H5T_STR_SPACEPAD of", i);
+        sprintf(buf, "This is row %d of type H5T_STR_SPACEPAD of", i);
         H5Tset_size(memtype, HDstrlen(buf) + 1);
         H5Sselect_hyperslab(hyper_space, H5S_SELECT_SET, start, stride, count, block);
         H5Dwrite(dataset, memtype, mem_space, hyper_space, H5P_DEFAULT, buf);
@@ -2021,7 +2021,7 @@ static void gent_str2(void)
 
     for(i = 0; (hsize_t)i < sdim; i++) {
         start[0] = (hsize_t)i;
-        sprintf(buf, "This is row %1d of type H5T_STR_SPACEPAD of string array", i);
+        sprintf(buf, "This is row %d of type H5T_STR_SPACEPAD of string array", i);
         H5Tset_size(memtype, HDstrlen(buf) + 1);
         H5Sselect_hyperslab(hyper_space, H5S_SELECT_SET, start, stride, count, block);
         H5Dwrite(dataset, memtype, mem_space, hyper_space, H5P_DEFAULT, buf);
@@ -7532,16 +7532,6 @@ gent_nodata(void)
 {
     hid_t fid, dataset, space;
     hsize_t dims[2];
-    uint8_t  dsetu8[F66_XDIM][F66_YDIM8],   valu8bits;
-    uint16_t dsetu16[F66_XDIM][F66_YDIM16], valu16bits;
-    uint32_t dsetu32[F66_XDIM][F66_YDIM32], valu32bits;
-    uint64_t dsetu64[F66_XDIM][F66_YDIM64], valu64bits;
-    int8_t  dset8[F66_XDIM][F66_YDIM8],   val8bits;
-    int16_t dset16[F66_XDIM][F66_YDIM16], val16bits;
-    int32_t dset32[F66_XDIM][F66_YDIM32], val32bits;
-    int64_t dset64[F66_XDIM][F66_YDIM64], val64bits;
-    double  dsetdbl[F66_XDIM][F66_YDIM8];
-    unsigned int i, j;
 
     fid = H5Fcreate(FILE87, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
 
diff --git a/tools/test/h5ls/CMakeLists.txt b/tools/test/h5ls/CMakeLists.txt
index f5c5671..0da03c5 100644
--- a/tools/test/h5ls/CMakeLists.txt
+++ b/tools/test/h5ls/CMakeLists.txt
@@ -5,15 +5,15 @@ project (HDF5_TOOLS_TEST_H5LS C)
 # If plugin library tests can be tested
 #-----------------------------------------------------------------------------
 if (BUILD_SHARED_LIBS)
-  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           ${HDF5_TOOL_PLUGIN_LIB_CORENAME})
+  set (H5LS_TOOL_PLUGIN_LIB_CORENAME         "dynlibls")
+  set (H5LS_TOOL_PLUGIN_LIB_NAME             "${HDF5_EXTERNAL_LIB_PREFIX}${H5LS_TOOL_PLUGIN_LIB_CORENAME}")
+  set (H5LS_TOOL_PLUGIN_LIB_TARGET           ${H5LS_TOOL_PLUGIN_LIB_CORENAME})
 
-  add_library (${HDF5_TOOL_PLUGIN_LIB_TARGET} SHARED dynlib_ls.c)
-  target_include_directories (${HDF5_TOOL_PLUGIN_LIB_TARGET} PRIVATE "${HDF5_SRC_DIR};${HDF5_BINARY_DIR};$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_INCLUDE_DIRS}>")
-  TARGET_C_PROPERTIES (${HDF5_TOOL_PLUGIN_LIB_TARGET} SHARED)
-  target_link_libraries (${HDF5_TOOL_PLUGIN_LIB_TARGET} PRIVATE ${HDF5_TEST_LIBSH_TARGET})
-  H5_SET_LIB_OPTIONS (${HDF5_TOOL_PLUGIN_LIB_TARGET} ${HDF5_TOOL_PLUGIN_LIB_NAME} SHARED "LIB")
+  add_library (${H5LS_TOOL_PLUGIN_LIB_TARGET} SHARED dynlib_ls.c)
+  target_include_directories (${H5LS_TOOL_PLUGIN_LIB_TARGET} PRIVATE "${HDF5_SRC_DIR};${HDF5_BINARY_DIR};$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_INCLUDE_DIRS}>")
+  TARGET_C_PROPERTIES (${H5LS_TOOL_PLUGIN_LIB_TARGET} SHARED)
+  target_link_libraries (${H5LS_TOOL_PLUGIN_LIB_TARGET} PRIVATE ${HDF5_TEST_LIBSH_TARGET})
+  H5_SET_LIB_OPTIONS (${H5LS_TOOL_PLUGIN_LIB_TARGET} ${H5LS_TOOL_PLUGIN_LIB_NAME} SHARED "LIB")
 
   # make plugins dir
   file (MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/plugins")
@@ -21,12 +21,12 @@ if (BUILD_SHARED_LIBS)
   # Copy plugin library to a plugins folder
   #-----------------------------------------------------------------------------
   add_custom_command (
-      TARGET     ${HDF5_TOOL_PLUGIN_LIB_TARGET}
+      TARGET     ${H5LS_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}>"
+          "$<TARGET_FILE:${H5LS_TOOL_PLUGIN_LIB_TARGET}>"
+          "${CMAKE_BINARY_DIR}/plugins/$<TARGET_FILE_NAME:${H5LS_TOOL_PLUGIN_LIB_TARGET}>"
   )
 endif ()
 
diff --git a/tools/test/h5ls/CMakeTests.cmake b/tools/test/h5ls/CMakeTests.cmake
index f4babb6..cd62297 100644
--- a/tools/test/h5ls/CMakeTests.cmake
+++ b/tools/test/h5ls/CMakeTests.cmake
@@ -232,6 +232,7 @@
               -D "TEST_REFERENCE=${resultfile}.ls"
               -D "TEST_ENV_VAR=HDF5_PLUGIN_PATH"
               -D "TEST_ENV_VALUE=${CMAKE_BINARY_DIR}/plugins"
+              -D "TEST_LIBRARY_DIRECTORY=${CMAKE_TEST_OUTPUT_DIRECTORY}"
               -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
       )
       set_tests_properties (H5LS_UD-${testname} PROPERTIES DEPENDS H5LS_UD-${testname}-clear-objects)
diff --git a/tools/test/h5repack/CMakeLists.txt b/tools/test/h5repack/CMakeLists.txt
index 1f4428f..92b61fc 100644
--- a/tools/test/h5repack/CMakeLists.txt
+++ b/tools/test/h5repack/CMakeLists.txt
@@ -43,24 +43,24 @@ set_target_properties (h5repacktest PROPERTIES FOLDER tools)
 # If plugin library tests can be tested
 #-----------------------------------------------------------------------------
 if (BUILD_SHARED_LIBS)
-  set (HDF5_TOOL_PLUGIN_LIB_CORENAME         "dynlibadd")
-  set (HDF5_TOOL_PLUGIN_LIB_NAME             "${HDF5_EXTERNAL_LIB_PREFIX}${HDF5_TOOL_PLUGIN_LIB_CORENAME}")
-  set (HDF5_TOOL_PLUGIN_LIB_TARGET           ${HDF5_TOOL_PLUGIN_LIB_CORENAME})
-  set (HDF5_TOOL_PLUGIN_LIB_VCORENAME        "dynlibvers")
-  set (HDF5_TOOL_PLUGIN_LIB_VNAME            "${HDF5_EXTERNAL_LIB_PREFIX}${HDF5_TOOL_PLUGIN_LIB_VCORENAME}")
-  set (HDF5_TOOL_PLUGIN_LIB_VTARGET          ${HDF5_TOOL_PLUGIN_LIB_VCORENAME})
+  set (H5REPACK_TOOL_PLUGIN_LIB_CORENAME         "dynlibadd")
+  set (H5REPACK_TOOL_PLUGIN_LIB_NAME             "${HDF5_EXTERNAL_LIB_PREFIX}${H5REPACK_TOOL_PLUGIN_LIB_CORENAME}")
+  set (H5REPACK_TOOL_PLUGIN_LIB_TARGET           ${H5REPACK_TOOL_PLUGIN_LIB_CORENAME})
+  set (H5REPACK_TOOL_PLUGIN_LIB_VCORENAME        "dynlibvers")
+  set (H5REPACK_TOOL_PLUGIN_LIB_VNAME            "${HDF5_EXTERNAL_LIB_PREFIX}${H5REPACK_TOOL_PLUGIN_LIB_VCORENAME}")
+  set (H5REPACK_TOOL_PLUGIN_LIB_VTARGET          ${H5REPACK_TOOL_PLUGIN_LIB_VCORENAME})
 
-  add_library (${HDF5_TOOL_PLUGIN_LIB_TARGET} SHARED dynlib_rpk.c)
-  target_include_directories (${HDF5_TOOL_PLUGIN_LIB_TARGET} PRIVATE "${HDF5_SRC_DIR};${HDF5_BINARY_DIR};$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_INCLUDE_DIRS}>")
-  TARGET_C_PROPERTIES (${HDF5_TOOL_PLUGIN_LIB_TARGET} SHARED)
-  target_link_libraries (${HDF5_TOOL_PLUGIN_LIB_TARGET} PRIVATE ${HDF5_TEST_LIBSH_TARGET})
-  H5_SET_LIB_OPTIONS (${HDF5_TOOL_PLUGIN_LIB_TARGET} ${HDF5_TOOL_PLUGIN_LIB_NAME} SHARED "LIB")
+  add_library (${H5REPACK_TOOL_PLUGIN_LIB_TARGET} SHARED dynlib_rpk.c)
+  target_include_directories (${H5REPACK_TOOL_PLUGIN_LIB_TARGET} PRIVATE "${HDF5_SRC_DIR};${HDF5_BINARY_DIR};$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_INCLUDE_DIRS}>")
+  TARGET_C_PROPERTIES (${H5REPACK_TOOL_PLUGIN_LIB_TARGET} SHARED)
+  target_link_libraries (${H5REPACK_TOOL_PLUGIN_LIB_TARGET} PRIVATE ${HDF5_TEST_LIBSH_TARGET})
+  H5_SET_LIB_OPTIONS (${H5REPACK_TOOL_PLUGIN_LIB_TARGET} ${H5REPACK_TOOL_PLUGIN_LIB_NAME} SHARED "LIB")
 
-  add_library (${HDF5_TOOL_PLUGIN_LIB_VTARGET} SHARED dynlib_vrpk.c)
-  target_include_directories (${HDF5_TOOL_PLUGIN_LIB_VTARGET} PRIVATE "${HDF5_SRC_DIR};${HDF5_BINARY_DIR};$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_INCLUDE_DIRS}>")
-  TARGET_C_PROPERTIES (${HDF5_TOOL_PLUGIN_LIB_VTARGET} SHARED)
-  target_link_libraries (${HDF5_TOOL_PLUGIN_LIB_VTARGET} PRIVATE ${HDF5_TEST_LIBSH_TARGET})
-  H5_SET_LIB_OPTIONS (${HDF5_TOOL_PLUGIN_LIB_VTARGET} ${HDF5_TOOL_PLUGIN_LIB_VNAME} SHARED "LIB")
+  add_library (${H5REPACK_TOOL_PLUGIN_LIB_VTARGET} SHARED dynlib_vrpk.c)
+  target_include_directories (${H5REPACK_TOOL_PLUGIN_LIB_VTARGET} PRIVATE "${HDF5_SRC_DIR};${HDF5_BINARY_DIR};$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_INCLUDE_DIRS}>")
+  TARGET_C_PROPERTIES (${H5REPACK_TOOL_PLUGIN_LIB_VTARGET} SHARED)
+  target_link_libraries (${H5REPACK_TOOL_PLUGIN_LIB_VTARGET} PRIVATE ${HDF5_TEST_LIBSH_TARGET})
+  H5_SET_LIB_OPTIONS (${H5REPACK_TOOL_PLUGIN_LIB_VTARGET} ${H5REPACK_TOOL_PLUGIN_LIB_VNAME} SHARED "LIB")
 
   # make plugins dir
   file (MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/plugins")
@@ -68,20 +68,20 @@ if (BUILD_SHARED_LIBS)
   # Copy plugin library to a plugins folder
   #-----------------------------------------------------------------------------
   add_custom_command (
-      TARGET     ${HDF5_TOOL_PLUGIN_LIB_TARGET}
+      TARGET     ${H5REPACK_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}>"
+            "$<TARGET_FILE:${H5REPACK_TOOL_PLUGIN_LIB_TARGET}>"
+            "${CMAKE_BINARY_DIR}/plugins/$<TARGET_FILE_NAME:${H5REPACK_TOOL_PLUGIN_LIB_TARGET}>"
   )
   add_custom_command (
-      TARGET     ${HDF5_TOOL_PLUGIN_LIB_VTARGET}
+      TARGET     ${H5REPACK_TOOL_PLUGIN_LIB_VTARGET}
       POST_BUILD
       COMMAND    ${CMAKE_COMMAND}
       ARGS       -E copy_if_different
-            "$<TARGET_FILE:${HDF5_TOOL_PLUGIN_LIB_VTARGET}>"
-            "${CMAKE_BINARY_DIR}/plugins/$<TARGET_FILE_NAME:${HDF5_TOOL_PLUGIN_LIB_VTARGET}>"
+            "$<TARGET_FILE:${H5REPACK_TOOL_PLUGIN_LIB_VTARGET}>"
+            "${CMAKE_BINARY_DIR}/plugins/$<TARGET_FILE_NAME:${H5REPACK_TOOL_PLUGIN_LIB_VTARGET}>"
   )
 endif ()
 
diff --git a/tools/test/h5repack/CMakeTests.cmake b/tools/test/h5repack/CMakeTests.cmake
index 3a90b2c..50be28a 100644
--- a/tools/test/h5repack/CMakeTests.cmake
+++ b/tools/test/h5repack/CMakeTests.cmake
@@ -677,6 +677,7 @@
               -D "TEST_REFERENCE=${testname}.${resultfile}.tst"
               -D "TEST_ENV_VAR=HDF5_PLUGIN_PATH"
               -D "TEST_ENV_VALUE=${CMAKE_BINARY_DIR}/plugins"
+              -D "TEST_LIBRARY_DIRECTORY=${CMAKE_TEST_OUTPUT_DIRECTORY}"
               -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
       )
       set_tests_properties (H5REPACK_UD-${testname} PROPERTIES DEPENDS H5REPACK_UD-${testname}-clear-objects)
@@ -691,6 +692,7 @@
               -D "TEST_REFERENCE=${resultfile}-${testname}.ddl"
               -D "TEST_ENV_VAR=HDF5_PLUGIN_PATH"
               -D "TEST_ENV_VALUE=${CMAKE_BINARY_DIR}/plugins"
+              -D "TEST_LIBRARY_DIRECTORY=${CMAKE_TEST_OUTPUT_DIRECTORY}"
               -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
       )
       set_tests_properties (H5REPACK_UD-${testname}-h5dump PROPERTIES DEPENDS "H5REPACK_UD-${testname}")
diff --git a/tools/test/h5repack/h5repacktst.c b/tools/test/h5repack/h5repacktst.c
index 0ae570b..a89bf10 100644
--- a/tools/test/h5repack/h5repacktst.c
+++ b/tools/test/h5repack/h5repacktst.c
@@ -2907,10 +2907,10 @@ out:
 static
 int make_all_filters(hid_t loc_id)
 {
-    hid_t    dcpl; /* dataset creation property list */
-    hid_t    sid;  /* dataspace ID */
-    hid_t    dtid;
-    hid_t    dsid;
+    hid_t    dcpl = H5I_INVALID_HID; /* dataset creation property list */
+    hid_t    sid = H5I_INVALID_HID;  /* dataspace ID */
+    hid_t    dtid = H5I_INVALID_HID;
+    hid_t    dsid = H5I_INVALID_HID;
 #if defined (H5_HAVE_FILTER_SZIP)
     unsigned szip_options_mask=H5_SZIP_ALLOW_K13_OPTION_MASK|H5_SZIP_NN_OPTION_MASK;
     unsigned szip_pixels_per_block=8;
@@ -3083,7 +3083,7 @@ int make_early(void)
     hid_t   tid=-1;
     hid_t   dcpl=-1;
     int     i;
-    char    name[10];
+    char    name[16];
     int     iter=100;
 
     if ((fid = H5Fcreate(FNAME5, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT)) < 0)
@@ -3178,7 +3178,7 @@ int make_layout(hid_t loc_id)
     hsize_t  chunk_dims[RANK]={CDIM1,CDIM2};
     int      buf[DIM1][DIM2];
     int      i, j, n;
-    char     name[6];
+    char     name[16];
 
 
     for (i=n=0; i<DIM1; i++)
diff --git a/tools/test/misc/CMakeTestsMkgrp.cmake b/tools/test/misc/CMakeTestsMkgrp.cmake
index 3ac5fc1..db1f805 100644
--- a/tools/test/misc/CMakeTestsMkgrp.cmake
+++ b/tools/test/misc/CMakeTestsMkgrp.cmake
@@ -82,7 +82,7 @@
       if (last_test)
         set_tests_properties (H5MKGRP-${resultfile} PROPERTIES DEPENDS ${last_test})
       endif ()
-    else (HDF5_ENABLE_USING_MEMCHECKER)
+    else ()
       set_tests_properties (H5MKGRP-${resultfile} PROPERTIES DEPENDS H5MKGRP-${resultfile}-clear-objects)
       add_test (
           NAME H5MKGRP-${resultfile}-h5ls
diff --git a/tools/test/perform/chunk_cache.c b/tools/test/perform/chunk_cache.c
index 429f70a..47734b6 100644
--- a/tools/test/perform/chunk_cache.c
+++ b/tools/test/perform/chunk_cache.c
@@ -106,8 +106,8 @@ cleanup (void)
  */
 static int create_dset1(hid_t file)
 {
-    hid_t        dataspace, dataset;
-    hid_t        dcpl;
+    hid_t        dataspace = H5I_INVALID_HID, dataset = H5I_INVALID_HID;
+    hid_t        dcpl = H5I_INVALID_HID;
     hsize_t      dims[RANK]  = {DSET1_DIM1, DSET1_DIM2};
     hsize_t      chunk_dims[RANK] = {CHUNK1_DIM1, CHUNK1_DIM2};
     int          data[DSET1_DIM1][DSET1_DIM2];    /* data for writing */
@@ -167,8 +167,8 @@ error:
  */
 static int create_dset2(hid_t file)
 {
-    hid_t        dataspace, dataset;
-    hid_t        dcpl;
+    hid_t        dataspace = H5I_INVALID_HID, dataset = H5I_INVALID_HID;
+    hid_t        dcpl = H5I_INVALID_HID;
     hsize_t      dims[RANK]  = {DSET2_DIM1, DSET2_DIM2};
     hsize_t      chunk_dims[RANK] = {CHUNK2_DIM1, CHUNK2_DIM2};
     int          data[DSET2_DIM1][DSET2_DIM2];    /* data for writing */
@@ -226,10 +226,10 @@ error:
  */
 static int check_partial_chunks_perf(hid_t file)
 {
-    hid_t        dataset;
-    hid_t        filespace;
-    hid_t        memspace;
-    hid_t        dapl;
+    hid_t        dataset = H5I_INVALID_HID;
+    hid_t        filespace = H5I_INVALID_HID;
+    hid_t        memspace = H5I_INVALID_HID;
+    hid_t        dapl = H5I_INVALID_HID;
     
     int          rdata[DSET1_DIM2];   /* data for reading */
     int          i;
@@ -297,10 +297,10 @@ error:
  */
 static int check_hash_value_perf(hid_t file)
 {
-    hid_t        dataset;
-    hid_t        filespace;
-    hid_t        memspace;
-    hid_t        dapl;
+    hid_t        dataset = H5I_INVALID_HID;
+    hid_t        filespace = H5I_INVALID_HID;
+    hid_t        memspace = H5I_INVALID_HID;
+    hid_t        dapl = H5I_INVALID_HID;
     
     int          rdata[DSET2_DIM1];   /* data for reading */
     int          i;
diff --git a/tools/test/perform/pio_standalone.c b/tools/test/perform/pio_standalone.c
index bd5fb6f..d5f681e 100644
--- a/tools/test/perform/pio_standalone.c
+++ b/tools/test/perform/pio_standalone.c
@@ -170,6 +170,7 @@ print_version(const char *progname)
 MPI_Info    h5_io_info_g=MPI_INFO_NULL;/* MPI INFO object for IO */
 #endif
 
+#if 0
 int
 h5_set_info_object(void)
 {
@@ -277,3 +278,6 @@ h5_dump_info_object(MPI_Info info)
 
     }
 }
+
+#endif
+