OESS-65 replace szip with aec szip

12 files changed, 91 insertions, 79 deletions

diff --git a/CMakeFilters.cmake b/CMakeFilters.cmake
index 5a89564..0d64b55 100644
--- a/CMakeFilters.cmake
+++ b/CMakeFilters.cmake
@@ -9,6 +9,7 @@
 # If you do not have access to either file, you may request a copy from
 # help@hdfgroup.org.
 #
+option (USE_LIBAEC "Use AEC library as SZip Filter" OFF)
 
 include (ExternalProject)
 #option (HDF5_ALLOW_EXTERNAL_SUPPORT "Allow External Library Building (NO GIT TGZ)" "NO")
@@ -32,6 +33,9 @@ if (HDF5_ALLOW_EXTERNAL_SUPPORT MATCHES "GIT" OR HDF5_ALLOW_EXTERNAL_SUPPORT MAT
       message (STATUS "Filter ZLIB file ${ZLIB_URL} not found")
     endif ()
     set (SZIP_URL ${TGZPATH}/${SZIP_TGZ_NAME})
+    if (USE_LIBAEC)
+      set (SZIP_URL ${TGZPATH}/${SZAEC_TGZ_NAME})
+    endif ()
     if (NOT EXISTS "${SZIP_URL}")
       set (HDF5_ENABLE_SZIP_SUPPORT OFF CACHE BOOL "" FORCE)
       message (STATUS "Filter SZIP file ${SZIP_URL} not found")
@@ -54,7 +58,6 @@ if (HDF5_ENABLE_Z_LIB_SUPPORT)
         find_package (ZLIB) # Legacy find
         if (ZLIB_FOUND)
           set (LINK_COMP_LIBS ${LINK_COMP_LIBS} ${ZLIB_LIBRARIES})
-          set (LINK_COMP_SHARED_LIBS ${LINK_COMP_SHARED_LIBS} ${ZLIB_LIBRARIES})
         endif ()
       endif ()
     endif ()
@@ -85,9 +88,6 @@ if (HDF5_ENABLE_Z_LIB_SUPPORT)
   if (H5_HAVE_FILTER_DEFLATE)
     set (EXTERNAL_FILTERS "${EXTERNAL_FILTERS} DEFLATE")
   endif ()
-  if (BUILD_SHARED_LIBS)
-    set (LINK_COMP_SHARED_LIBS ${LINK_COMP_SHARED_LIBS} ${ZLIB_SHARED_LIBRARY})
-  endif ()
   set (LINK_COMP_LIBS ${LINK_COMP_LIBS} ${ZLIB_STATIC_LIBRARY})
   INCLUDE_DIRECTORIES (${ZLIB_INCLUDE_DIRS})
   message (STATUS "Filter ZLIB is ON")
@@ -105,7 +105,6 @@ if (HDF5_ENABLE_SZIP_SUPPORT)
       find_package (SZIP) # Legacy find
       if (SZIP_FOUND)
         set (LINK_COMP_LIBS ${LINK_COMP_LIBS} ${SZIP_LIBRARIES})
-        set (LINK_COMP_SHARED_LIBS ${LINK_COMP_SHARED_LIBS} ${SZIP_LIBRARIES})
       endif ()
     endif ()
   endif ()
@@ -122,13 +121,13 @@ if (HDF5_ENABLE_SZIP_SUPPORT)
       set (H5_HAVE_SZLIB_H 1)
       set (H5_HAVE_LIBSZ 1)
       message (STATUS "Filter SZIP is built")
+      if (USE_LIBAEC)
+        message (STATUS "... with library AEC")
+      endif ()
     else ()
       message (FATAL_ERROR "SZIP is Required for SZIP support in HDF5")
     endif ()
   endif ()
-  if (BUILD_SHARED_LIBS)
-    set (LINK_COMP_SHARED_LIBS ${LINK_COMP_SHARED_LIBS} ${SZIP_SHARED_LIBRARY})
-  endif ()
   set (LINK_COMP_LIBS ${LINK_COMP_LIBS} ${SZIP_STATIC_LIBRARY})
   INCLUDE_DIRECTORIES (${SZIP_INCLUDE_DIRS})
   message (STATUS "Filter SZIP is ON")
diff --git a/CMakeLists.txt b/CMakeLists.txt
index a4aa60c..a3fa903 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -753,28 +753,28 @@ if (HDF5_ENABLE_THREADSAFE)
   endif ()
   if (HDF5_ENABLE_PARALLEL)
     if (NOT ALLOW_UNSUPPORTED)
-      message (FATAL_ERROR " **** parallel and thread-safety options are not supported **** ")
+      message (FATAL_ERROR " **** parallel and thread-safety options are not supported, override with ALLOW_UNSUPPORTED option **** ")
     else ()
       message (STATUS " **** Allowing unsupported parallel and thread-safety options **** ")
     endif ()
   endif ()
   if (HDF5_BUILD_FORTRAN)
     if (NOT ALLOW_UNSUPPORTED)
-      message (FATAL_ERROR " **** Fortran and thread-safety options are not supported **** ")
+      message (FATAL_ERROR " **** Fortran and thread-safety options are not supported, override with ALLOW_UNSUPPORTED option **** ")
     else ()
       message (STATUS " **** Allowing unsupported Fortran and thread-safety options **** ")
     endif ()
   endif ()
   if (HDF5_BUILD_CPP_LIB)
     if (NOT ALLOW_UNSUPPORTED)
-      message (FATAL_ERROR " **** C++ and thread-safety options are not supported **** ")
+      message (FATAL_ERROR " **** C++ and thread-safety options are not supported, override with ALLOW_UNSUPPORTED option **** ")
     else ()
       message (STATUS " **** Allowing unsupported C++ and thread-safety options **** ")
     endif ()
   endif ()
   if (HDF5_BUILD_HL_LIB)
     if (NOT ALLOW_UNSUPPORTED)
-      message (FATAL_ERROR " **** HL and thread-safety options are not supported **** ")
+      message (FATAL_ERROR " **** HL and thread-safety options are not supported, override with ALLOW_UNSUPPORTED option **** ")
     else ()
       message (STATUS " **** Allowing unsupported HL and thread-safety options **** ")
     endif ()
@@ -965,7 +965,7 @@ if (EXISTS "${HDF5_SOURCE_DIR}/c++" AND IS_DIRECTORY "${HDF5_SOURCE_DIR}/c++")
     # check for unsupported options
     if (HDF5_ENABLE_PARALLEL)
       if (NOT ALLOW_UNSUPPORTED)
-        message (FATAL_ERROR " **** Parallel and C++ options are mutually exclusive **** ")
+        message (FATAL_ERROR " **** Parallel and C++ options are mutually exclusive, override with ALLOW_UNSUPPORTED option **** ")
       else ()
         message (STATUS " **** Allowing unsupported Parallel and C++ options **** ")
       endif ()
diff --git a/bin/release b/bin/release
index d7d0a55..7a24938 100755
--- a/bin/release
+++ b/bin/release
@@ -177,14 +177,14 @@ tar2zip()
 #    Note: do this in a temporary directory to avoid changing
 #    the original source directory which may be around.
 # 2. add build-unix.sh script.
-# 3. add SZIP.tar.gz, ZLib.tar.gz and cmake files to top level directory.
+# 3. add LIBAEC.tar.gz, ZLib.tar.gz and cmake files to top level directory.
 # 4. create gzipped tar file with these contents:
 #        build-unix.sh          script
 #        hdf5-<version>         source code directory extracted from tar file
 #        CTestScript.cmake      cmake file copied from <hdf5 source code>/config/cmake/scripts
 #        HDF5config.cmake       cmake file copied from <hdf5 source code>/config/cmake/scripts
 #        HDF5options.cmake      cmake file copied from <hdf5 source code>/config/cmake/scripts
-#        SZip.tar.gz            copied from /mnt/scr1/pre-release/hdf5/CMake
+#        LIBAEC.tar.gz          copied from /mnt/scr1/pre-release/hdf5/CMake
 #        ZLib.tar.gz            copied from /mnt/scr1/pre-release/hdf5/CMake
 
 
@@ -197,7 +197,7 @@ tar2zip()
 #
  # need function to create another temporary directory, extract the
             # $tmpdir/$HDF5_VERS.tar into it, create build-VS*.bat files,
-            # add CTestScript.cmake, HDF5config.cmake, SZIP.tar.gz
+            # add CTestScript.cmake, HDF5config.cmake, LIBAEC.tar.gz
             # ZLib.tar.gz, HDF5 examples, and then zip it.
 tar2cmakezip()
 {
@@ -230,8 +230,8 @@ tar2cmakezip()
     (cd $cmziptmpsubdir; echo "ctest -S HDF5config.cmake,BUILD_GENERATOR=VS2017 -C Release -V -O hdf5.log" > build-VS2017-32.bat; chmod 755 build-VS2017-32.bat)
     (cd $cmziptmpsubdir; echo "ctest -S HDF5config.cmake,BUILD_GENERATOR=VS201764 -C Release -V -O hdf5.log" > build-VS2017-64.bat; chmod 755 build-VS2017-64.bat)
 
-    # step 3: add SZIP.tar.gz, ZLib.tar.gz and cmake files
-    cp /mnt/scr1/pre-release/hdf5/CMake/SZip.tar.gz $cmziptmpsubdir
+    # step 3: add LIBAEC.tar.gz, ZLib.tar.gz and cmake files
+    cp /mnt/scr1/pre-release/hdf5/CMake/LIBAEC.tar.gz $cmziptmpsubdir
     cp /mnt/scr1/pre-release/hdf5/CMake/ZLib.tar.gz $cmziptmpsubdir
     cp /mnt/scr1/pre-release/hdf5/CMake/HDF5Examples-1.10.14-Source.zip $cmziptmpsubdir
     cp $cmziptmpsubdir/$version/config/cmake/scripts/CTestScript.cmake $cmziptmpsubdir
@@ -276,14 +276,14 @@ tar2cmakezip()
 #    Note: do this in a temporary directory to avoid changing
 #    the original source directory which may be around.
 # 2. add build-unix.sh script.
-# 3. add SZIP.tar.gz, ZLib.tar.gz and cmake files to top level directory.
+# 3. add LIBAEC.tar.gz, ZLib.tar.gz and cmake files to top level directory.
 # 4. create gzipped tar file with these contents:
 #        build-unix.sh          script
 #        hdf5-<version>         source code directory extracted from tar file
 #        CTestScript.cmake      cmake file copied from <hdf5 source code>/config/cmake/scripts
 #        HDF5config.cmake       cmake file copied from <hdf5 source code>/config/cmake/scripts
 #        HDF5options.cmake      cmake file copied from <hdf5 source code>/config/cmake/scripts
-#        SZip.tar.gz            copied from /mnt/scr1/pre-release/hdf5/CMake
+#        LIBAEC.tar.gz          copied from /mnt/scr1/pre-release/hdf5/CMake
 #        ZLib.tar.gz            copied from /mnt/scr1/pre-release/hdf5/CMake
 
 
@@ -296,7 +296,7 @@ tar2cmakezip()
 #
  # need function to create another temporary directory, extract the
             # $tmpdir/$HDF5_VERS.tar into it, create build-unix.sh,
-            # add CTestScript.cmake, HDF5config.cmake, SZIP.tar.gz
+            # add CTestScript.cmake, HDF5config.cmake, LIBAEC.tar.gz
             # ZLib.tar.gz, HDF5 examples, and then tar.gz it.
 tar2cmaketgz()
 {
@@ -325,8 +325,8 @@ tar2cmaketgz()
     # step 2: add build-unix.sh script
     (cd $cmgztmpsubdir; echo "ctest -S HDF5config.cmake,BUILD_GENERATOR=Unix -C Release -V -O hdf5.log" > build-unix.sh; chmod 755 build-unix.sh)
 
-    # step 3: add SZIP.tar.gz, ZLib.tar.gz and cmake files
-    cp /mnt/scr1/pre-release/hdf5/CMake/SZip.tar.gz $cmgztmpsubdir
+    # step 3: add LIBAEC.tar.gz, ZLib.tar.gz and cmake files
+    cp /mnt/scr1/pre-release/hdf5/CMake/LIBAEC.tar.gz $cmgztmpsubdir
     cp /mnt/scr1/pre-release/hdf5/CMake/ZLib.tar.gz $cmgztmpsubdir
     cp /mnt/scr1/pre-release/hdf5/CMake/HDF5Examples-1.10.14-Source.tar.gz $cmgztmpsubdir
     cp $cmgztmpsubdir/$version/config/cmake/scripts/CTestScript.cmake $cmgztmpsubdir
@@ -353,14 +353,14 @@ tar2cmaketgz()
 #    Note: do this in a temporary directory to avoid changing
 #    the original source directory which may be around.
 # 2. add build-unix.sh script.
-# 3. add SZIP.tar.gz, ZLib.tar.gz and cmake files to top level directory.
+# 3. add LIBAEC.tar.gz, ZLib.tar.gz and cmake files to top level directory.
 # 4. create gzipped tar file with these contents:
 #        build-unix.sh          script
 #        hdf5-<version>         source code directory extracted from tar file
 #        CTestScript.cmake      cmake file copied from <hdf5 source code>/config/cmake/scripts
 #        HDF5config.cmake       cmake file copied from <hdf5 source code>/config/cmake/scripts
 #        HDF5options.cmake      cmake file copied from <hdf5 source code>/config/cmake/scripts
-#        SZip.tar.gz            copied from /mnt/scr1/pre-release/hdf5/CMake
+#        LIBAEC.tar.gz          copied from /mnt/scr1/pre-release/hdf5/CMake
 #        ZLib.tar.gz            copied from /mnt/scr1/pre-release/hdf5/CMake
 #
 # 5. For HPC-CMake tgz file the following are also needed in the top-level directory:
@@ -379,7 +379,7 @@ tar2cmaketgz()
 #
  # need function to create another temporary directory, extract the
             # $tmpdir/$HDF5_VERS.tar into it, create build-unix.sh,
-            # add CTestScript.cmake, HDF5config.cmake, SZIP.tar.gz
+            # add CTestScript.cmake, HDF5config.cmake, LIBAEC.tar.gz
             # ZLib.tar.gz, HDF5 examples, and then tar.gz it.
 tar2hpccmaketgz()
 {
@@ -408,8 +408,8 @@ tar2hpccmaketgz()
     # step 2: add build-unix.sh script
     (cd $cmgztmpsubdir; echo "ctest -S HDF5config.cmake,BUILD_GENERATOR=Unix -C Release -V -O hdf5.log" > build-unix.sh; chmod 755 build-unix.sh)
 
-    # step 3: add SZIP.tar.gz, ZLib.tar.gz and cmake files
-    cp /mnt/scr1/pre-release/hdf5/CMake/SZip.tar.gz $cmgztmpsubdir
+    # step 3: add LIBAEC.tar.gz, ZLib.tar.gz and cmake files
+    cp /mnt/scr1/pre-release/hdf5/CMake/LIBAEC.tar.gz $cmgztmpsubdir
     cp /mnt/scr1/pre-release/hdf5/CMake/ZLib.tar.gz $cmgztmpsubdir
     cp /mnt/scr1/pre-release/hdf5/CMake/HDF5Examples-1.10.14-Source.tar.gz $cmgztmpsubdir
     cp $cmgztmpsubdir/$version/config/cmake/scripts/CTestScript.cmake $cmgztmpsubdir
diff --git a/config/cmake/HDFCXXCompilerFlags.cmake b/config/cmake/HDFCXXCompilerFlags.cmake
index 1c95266..47991bf 100644
--- a/config/cmake/HDFCXXCompilerFlags.cmake
+++ b/config/cmake/HDFCXXCompilerFlags.cmake
@@ -299,7 +299,7 @@ if (HDF5_ENABLE_GROUPZERO_WARNINGS)
   else ()
     if (CMAKE_COMPILER_IS_GNUCC)
       if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
-        list (APPEND HDF5_CMAKE_CXX_FLAGS ${H5_CFLAGS0})
+        list (APPEND HDF5_CMAKE_CXX_FLAGS ${H5_CXXFLAGS0})
       endif ()
     endif ()
   endif ()
@@ -318,7 +318,7 @@ if (HDF5_ENABLE_GROUPONE_WARNINGS)
   else ()
     if (CMAKE_COMPILER_IS_GNUCC)
       if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
-        list (APPEND HDF5_CMAKE_CXX_FLAGS ${H5_CFLAGS1})
+        list (APPEND HDF5_CMAKE_CXX_FLAGS ${H5_CXXFLAGS1})
       endif ()
     endif ()
   endif ()
@@ -337,7 +337,7 @@ if (HDF5_ENABLE_GROUPTWO_WARNINGS)
   else ()
     if (CMAKE_COMPILER_IS_GNUCC)
       if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
-        list (APPEND HDF5_CMAKE_CXX_FLAGS ${H5_CFLAGS2})
+        list (APPEND HDF5_CMAKE_CXX_FLAGS ${H5_CXXFLAGS2})
       endif ()
     endif ()
   endif ()
@@ -356,7 +356,7 @@ if (HDF5_ENABLE_GROUPTHREE_WARNINGS)
   else ()
     if (CMAKE_COMPILER_IS_GNUCC)
       if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
-        list (APPEND HDF5_CMAKE_CXX_FLAGS ${H5_CFLAGS3})
+        list (APPEND HDF5_CMAKE_CXX_FLAGS ${H5_CXXFLAGS3})
       endif ()
     endif ()
   endif ()
@@ -370,7 +370,7 @@ if (HDF5_ENABLE_GROUPFOUR_WARNINGS)
   if (NOT MSVC)
     if (CMAKE_COMPILER_IS_GNUCC)
       if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
-        list (APPEND HDF5_CMAKE_CXX_FLAGS ${H5_CFLAGS4})
+        list (APPEND HDF5_CMAKE_CXX_FLAGS ${H5_CXXFLAGS4})
       endif ()
     endif ()
   endif ()
diff --git a/config/cmake/HDFCompilerFlags.cmake b/config/cmake/HDFCompilerFlags.cmake
index ddd3703..6dbaa64 100644
--- a/config/cmake/HDFCompilerFlags.cmake
+++ b/config/cmake/HDFCompilerFlags.cmake
@@ -93,8 +93,8 @@ if (NOT MSVC)
         list (APPEND H5_CFLAGS0 "-Wsign-compare -Wtrigraphs -Wwrite-strings")
       endif()
     elseif (CMAKE_C_COMPILER_ID STREQUAL "GNU")
-      # Add general CFlags except for older versions that are no longer supported
-      if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.2)
+      # Add general CFlags for GCC versions 4.2 and above
+      if (CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 4.2)
         ADD_H5_FLAGS (HDF5_CMAKE_C_FLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/general")
       endif ()
       if (CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 4.8)
@@ -138,7 +138,7 @@ if (NOT MSVC)
   if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
     # Technically, variable-length arrays are part of the C99 standard, but
     #   we should approach them a bit cautiously... Only needed for gcc 4.X
-    if (CMAKE_C_COMPILER_VERSION VERSION_LESS 5.0 AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.2)
+    if (CMAKE_C_COMPILER_VERSION VERSION_LESS 5.0 AND CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 4.2)
       ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.2-4.last")
     endif ()
 
@@ -153,11 +153,10 @@ if (NOT MSVC)
     endif ()
 
     # Append warning flags that only gcc 4.3+ knows about
-    if (CMAKE_C_COMPILER_VERSION VERSION_LESS 4.3 AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.2)
+    if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.3)
       ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.3")
     endif ()
 
-
     # Append more extra warning flags that only gcc 4.4+ know about
     if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.4)
       ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.4")
@@ -174,7 +173,7 @@ if (NOT MSVC)
     endif ()
 
     # Append more extra warning flags that only gcc 4.6 and less know about
-    if (CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7 AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.2)
+    if (CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7 AND CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 4.2)
       ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.2-4.6")
     endif ()
 
@@ -218,7 +217,7 @@ if (NOT MSVC)
       ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.9")
     endif ()
 
-    # Append more extra warning flags that only gcc 5.1+ know about
+    # Append more extra warning flags that only gcc 5.x+ know about
     if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 5.0)
       ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/5")
       ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/error-5")
@@ -242,6 +241,7 @@ if (NOT MSVC)
     # Append more extra warning flags that only gcc 8.x+ know about
     if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 8.0)
       ADD_H5_FLAGS (H5_CFLAGS3 "${HDF5_SOURCE_DIR}/config/gnu-warnings/8")
+      ADD_H5_FLAGS (H5_CFLAGS3 "${HDF5_SOURCE_DIR}/config/gnu-warnings/error-8")
       if (HDF5_ENABLE_DEV_WARNINGS)
         ADD_H5_FLAGS (H5_CFLAGS3 "${HDF5_SOURCE_DIR}/config/gnu-warnings/developer-8")
       else ()
diff --git a/config/cmake/cacheinit.cmake b/config/cmake/cacheinit.cmake
index 5254115..4efb185 100644
--- a/config/cmake/cacheinit.cmake
+++ b/config/cmake/cacheinit.cmake
@@ -43,6 +43,8 @@ set_property (CACHE HDF5_ALLOW_EXTERNAL_SUPPORT PROPERTY STRINGS NO GIT TGZ)
 set (ZLIB_TGZ_NAME "ZLib.tar.gz" CACHE STRING "Use ZLib from compressed file" FORCE)
 
 set (SZIP_TGZ_NAME "SZip.tar.gz" CACHE STRING "Use SZip from compressed file" FORCE)
+set (SZAEC_TGZ_NAME "LIBAEC.tar.gz" CACHE STRING "Use SZip AEC from compressed file" FORCE)
+set (USE_LIBAEC ON CACHE BOOL "Use libaec szip replacement" FORCE)
 
 set (ZLIB_PACKAGE_NAME "zlib" CACHE STRING "Name of ZLIB package" FORCE)
 
diff --git a/config/cmake/mccacheinit.cmake b/config/cmake/mccacheinit.cmake
index 1608202..f4bfb07 100644
--- a/config/cmake/mccacheinit.cmake
+++ b/config/cmake/mccacheinit.cmake
@@ -51,6 +51,8 @@ set_property (CACHE HDF5_ALLOW_EXTERNAL_SUPPORT PROPERTY STRINGS NO GIT TGZ)
 set (ZLIB_TGZ_NAME "ZLib.tar.gz" CACHE STRING "Use ZLib from compressed file" FORCE)
 
 set (SZIP_TGZ_NAME "SZip.tar.gz" CACHE STRING "Use SZip from compressed file" FORCE)
+set (SZAEC_TGZ_NAME "LIBAEC.tar.gz" CACHE STRING "Use SZip AEC from compressed file" FORCE)
+set (USE_LIBAEC ON CACHE BOOL "Use libaec szip replacement" FORCE)
 
 set (CMAKE_BUILD_TYPE "Debug" CACHE STRING "Build Debug" FORCE)
 
diff --git a/config/cmake_ext_mod/HDFLibMacros.cmake b/config/cmake_ext_mod/HDFLibMacros.cmake
index 9df2b4b..cbca47f 100644
--- a/config/cmake_ext_mod/HDFLibMacros.cmake
+++ b/config/cmake_ext_mod/HDFLibMacros.cmake
@@ -20,7 +20,7 @@ macro (EXTERNAL_JPEG_LIBRARY compress_type jpeg_pic)
         GIT_TAG ${JPEG_BRANCH}
         INSTALL_COMMAND ""
         CMAKE_ARGS
-            -DBUILD_SHARED_LIBS:BOOL=${BUILD_SHARED_LIBS}
+            -DBUILD_SHARED_LIBS:BOOL=OFF
             -DJPEG_PACKAGE_EXT:STRING=${HDF_PACKAGE_EXT}
             -DJPEG_EXTERNALLY_CONFIGURED:BOOL=OFF
             -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
@@ -39,7 +39,7 @@ macro (EXTERNAL_JPEG_LIBRARY compress_type jpeg_pic)
         URL_MD5 ""
         INSTALL_COMMAND ""
         CMAKE_ARGS
-            -DBUILD_SHARED_LIBS:BOOL=${BUILD_SHARED_LIBS}
+            -DBUILD_SHARED_LIBS:BOOL=OFF
             -DJPEG_PACKAGE_EXT:STRING=${HDF_PACKAGE_EXT}
             -DJPEG_EXTERNALLY_CONFIGURED:BOOL=OFF
             -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
@@ -62,14 +62,6 @@ macro (EXTERNAL_JPEG_LIBRARY compress_type jpeg_pic)
   add_dependencies (${HDF_PACKAGE_NAMESPACE}jpeg-static JPEG)
   set (JPEG_STATIC_LIBRARY "${HDF_PACKAGE_NAMESPACE}jpeg-static")
   set (JPEG_LIBRARIES ${JPEG_STATIC_LIBRARY})
-  if (BUILD_SHARED_LIBS)
-    # Create imported target jpeg-shared
-    add_library(${HDF_PACKAGE_NAMESPACE}jpeg-shared SHARED IMPORTED)
-    HDF_IMPORT_SET_LIB_OPTIONS (${HDF_PACKAGE_NAMESPACE}jpeg-shared "jpeg" SHARED "")
-    add_dependencies (${HDF_PACKAGE_NAMESPACE}jpeg-shared JPEG)
-    set (JPEG_SHARED_LIBRARY "${HDF_PACKAGE_NAMESPACE}jpeg-shared")
-    set (JPEG_LIBRARIES ${JPEG_LIBRARIES} ${JPEG_SHARED_LIBRARY})
-  endif ()
 
   set (JPEG_INCLUDE_DIR_GEN "${BINARY_DIR}")
   set (JPEG_INCLUDE_DIR "${SOURCE_DIR}/src")
@@ -97,7 +89,7 @@ macro (EXTERNAL_SZIP_LIBRARY compress_type encoding)
         GIT_TAG ${SZIP_BRANCH}
         INSTALL_COMMAND ""
         CMAKE_ARGS
-            -DBUILD_SHARED_LIBS:BOOL=${BUILD_SHARED_LIBS}
+            -DBUILD_SHARED_LIBS:BOOL=OFF
             -DSZIP_PACKAGE_EXT:STRING=${HDF_PACKAGE_EXT}
             -DSZIP_EXTERNALLY_CONFIGURED:BOOL=OFF
             -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
@@ -117,7 +109,7 @@ macro (EXTERNAL_SZIP_LIBRARY compress_type encoding)
         URL_MD5 ""
         INSTALL_COMMAND ""
         CMAKE_ARGS
-            -DBUILD_SHARED_LIBS:BOOL=${BUILD_SHARED_LIBS}
+            -DBUILD_SHARED_LIBS:BOOL=OFF
             -DSZIP_PACKAGE_EXT:STRING=${HDF_PACKAGE_EXT}
             -DSZIP_EXTERNALLY_CONFIGURED:BOOL=OFF
             -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
@@ -136,19 +128,21 @@ macro (EXTERNAL_SZIP_LIBRARY compress_type encoding)
 
 ##include (${BINARY_DIR}/${SZIP_PACKAGE_NAME}${HDF_PACKAGE_EXT}-targets.cmake)
 # Create imported target szip-static
-  add_library(${HDF_PACKAGE_NAMESPACE}szip-static STATIC IMPORTED)
-  HDF_IMPORT_SET_LIB_OPTIONS (${HDF_PACKAGE_NAMESPACE}szip-static "szip" STATIC "")
-  add_dependencies (${HDF_PACKAGE_NAMESPACE}szip-static SZIP)
-  set (SZIP_STATIC_LIBRARY "${HDF_PACKAGE_NAMESPACE}szip-static")
-  set (SZIP_LIBRARIES ${SZIP_STATIC_LIBRARY})
-  if (BUILD_SHARED_LIBS)
-    # Create imported target szip-shared
-    add_library(${HDF_PACKAGE_NAMESPACE}szip-shared SHARED IMPORTED)
-    HDF_IMPORT_SET_LIB_OPTIONS (${HDF_PACKAGE_NAMESPACE}szip-shared "szip" SHARED "")
-    add_dependencies (${HDF_PACKAGE_NAMESPACE}szip-shared SZIP)
-    set (SZIP_SHARED_LIBRARY "${HDF_PACKAGE_NAMESPACE}szip-shared")
-    set (SZIP_LIBRARIES ${SZIP_LIBRARIES} ${SZIP_SHARED_LIBRARY})
+  if (USE_LIBAEC)
+    add_library(${HDF_PACKAGE_NAMESPACE}szip-static STATIC IMPORTED)
+    HDF_IMPORT_SET_LIB_OPTIONS (${HDF_PACKAGE_NAMESPACE}szip-static "sz" STATIC "")
+    add_dependencies (${HDF_PACKAGE_NAMESPACE}szip-static SZIP)
+    add_library(${HDF_PACKAGE_NAMESPACE}szaec-static STATIC IMPORTED)
+    HDF_IMPORT_SET_LIB_OPTIONS (${HDF_PACKAGE_NAMESPACE}szaec-static "aec" STATIC "")
+    add_dependencies (${HDF_PACKAGE_NAMESPACE}szaec-static SZIP)
+    set (SZIP_STATIC_LIBRARY "${HDF_PACKAGE_NAMESPACE}szip-static;${HDF_PACKAGE_NAMESPACE}szaec-static")
+  else ()
+    add_library(${HDF_PACKAGE_NAMESPACE}szip-static STATIC IMPORTED)
+    HDF_IMPORT_SET_LIB_OPTIONS (${HDF_PACKAGE_NAMESPACE}szip-static "szip" STATIC "")
+    add_dependencies (${HDF_PACKAGE_NAMESPACE}szip-static SZIP)
+    set (SZIP_STATIC_LIBRARY "${HDF_PACKAGE_NAMESPACE}szip-static")
   endif ()
+  set (SZIP_LIBRARIES ${SZIP_STATIC_LIBRARY})
 
   set (SZIP_INCLUDE_DIR_GEN "${BINARY_DIR}")
   set (SZIP_INCLUDE_DIR "${SOURCE_DIR}/src")
@@ -158,11 +152,15 @@ endmacro ()
 
 #-------------------------------------------------------------------------------
 macro (PACKAGE_SZIP_LIBRARY compress_type)
+  set (SZIP_HDR "SZconfig")
+  if (USE_LIBAEC)
+    set (SZIP_HDR "libaec_Export")
+  endif ()
   add_custom_target (SZIP-GenHeader-Copy ALL
-      COMMAND ${CMAKE_COMMAND} -E copy_if_different ${SZIP_INCLUDE_DIR_GEN}/SZconfig.h ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/
-      COMMENT "Copying ${SZIP_INCLUDE_DIR_GEN}/SZconfig.h to ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/"
+      COMMAND ${CMAKE_COMMAND} -E copy_if_different ${SZIP_INCLUDE_DIR_GEN}/${SZIP_HDR}.h ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/
+      COMMENT "Copying ${SZIP_INCLUDE_DIR_GEN}/${SZIP_HDR}.h to ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/"
   )
-  set (EXTERNAL_HEADER_LIST ${EXTERNAL_HEADER_LIST} ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/SZconfig.h)
+  set (EXTERNAL_HEADER_LIST ${EXTERNAL_HEADER_LIST} ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${SZIP_HDR}.h)
   if (${compress_type} MATCHES "GIT" OR ${compress_type} MATCHES "TGZ")
     add_dependencies (SZIP-GenHeader-Copy SZIP)
   endif ()
@@ -176,7 +174,7 @@ macro (EXTERNAL_ZLIB_LIBRARY compress_type)
         GIT_TAG ${ZLIB_BRANCH}
         INSTALL_COMMAND ""
         CMAKE_ARGS
-            -DBUILD_SHARED_LIBS:BOOL=${BUILD_SHARED_LIBS}
+            -DBUILD_SHARED_LIBS:BOOL=OFF
             -DZLIB_PACKAGE_EXT:STRING=${HDF_PACKAGE_EXT}
             -DZLIB_EXTERNALLY_CONFIGURED:BOOL=OFF
             -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
@@ -195,7 +193,7 @@ macro (EXTERNAL_ZLIB_LIBRARY compress_type)
         URL_MD5 ""
         INSTALL_COMMAND ""
         CMAKE_ARGS
-            -DBUILD_SHARED_LIBS:BOOL=${BUILD_SHARED_LIBS}
+            -DBUILD_SHARED_LIBS:BOOL=OFF
             -DZLIB_PACKAGE_EXT:STRING=${HDF_PACKAGE_EXT}
             -DZLIB_EXTERNALLY_CONFIGURED:BOOL=OFF
             -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
@@ -224,14 +222,6 @@ macro (EXTERNAL_ZLIB_LIBRARY compress_type)
   add_dependencies (${HDF_PACKAGE_NAMESPACE}zlib-static ZLIB)
   set (ZLIB_STATIC_LIBRARY "${HDF_PACKAGE_NAMESPACE}zlib-static")
   set (ZLIB_LIBRARIES ${ZLIB_STATIC_LIBRARY})
-  if (BUILD_SHARED_LIBS)
-    # Create imported target zlib-shared
-    add_library(${HDF_PACKAGE_NAMESPACE}zlib-shared SHARED IMPORTED)
-    HDF_IMPORT_SET_LIB_OPTIONS (${HDF_PACKAGE_NAMESPACE}zlib-shared ${ZLIB_LIB_NAME} SHARED "")
-    add_dependencies (${HDF_PACKAGE_NAMESPACE}zlib-shared ZLIB)
-    set (ZLIB_SHARED_LIBRARY "${HDF_PACKAGE_NAMESPACE}zlib-shared")
-    set (ZLIB_LIBRARIES ${ZLIB_LIBRARIES} ${ZLIB_SHARED_LIBRARY})
-  endif ()
 
   set (ZLIB_INCLUDE_DIR_GEN "${BINARY_DIR}")
   set (ZLIB_INCLUDE_DIR "${SOURCE_DIR}")
diff --git a/config/toolchain/build32.cmake b/config/toolchain/build32.cmake
index deb5899..207d03e 100644
--- a/config/toolchain/build32.cmake
+++ b/config/toolchain/build32.cmake
@@ -72,4 +72,4 @@ else ()
 # for libraries and headers in the target directories
   set (CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
   set (CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
-endif ()
\ No newline at end of file
+endif ()
diff --git a/release_docs/INSTALL_CMake.txt b/release_docs/INSTALL_CMake.txt
index 57cfd7e..2e47bc0 100644
--- a/release_docs/INSTALL_CMake.txt
+++ b/release_docs/INSTALL_CMake.txt
@@ -61,6 +61,7 @@ CMake build script:
     CTestScript.cmake
 
 External compression szip and zlib libraries:
+    LIBAEC.tar.gz
     SZip.tar.gz
     ZLib.tar.gz
 
@@ -475,6 +476,8 @@ These five steps are described in detail below.
                 set_property (CACHE HDF5_ALLOW_EXTERNAL_SUPPORT PROPERTY STRINGS NO GIT TGZ)
                 set (ZLIB_TGZ_NAME "ZLib.tar.gz" CACHE STRING "Use ZLib from compressed file" FORCE)
                 set (SZIP_TGZ_NAME "SZip.tar.gz" CACHE STRING "Use SZip from compressed file" FORCE)
+                set (SZAEC_TGZ_NAME "LIBAEC.tar.gz" CACHE STRING "Use SZip AEC from compressed file" FORCE)
+                set (USE_LIBAEC ON CACHE BOOL "Use libaec szip replacement" FORCE)
                 set (ZLIB_PACKAGE_NAME "zlib" CACHE STRING "Name of ZLIB package" FORCE)
                 set (SZIP_PACKAGE_NAME "szip" CACHE STRING "Name of SZIP package" FORCE)
 
@@ -550,12 +553,17 @@ These five steps are described in detail below.
            file) are:
                ZLIB_TGZ_NAME:STRING="zlib_src.ext"
                SZIP_TGZ_NAME:STRING="szip_src.ext"
+               LIBAEC_TGZ_NAME:STRING="liaec_src.ext"
                TGZPATH:STRING="some_location"
             where "some_location/xxxx_src.ext" is the URL or full path to
             the compressed file and where ext is the type of the compression
             file such as .bz2, .tar, .tar.gz, .tgz, or .zip. Also define
             CMAKE_BUILD_TYPE to be the configuration type.
 
+           NOTE: the USE_LIBAEC option will use the file named by LIBAEC_TGZ_NAME
+            to build SZIP instead of the file named by SZIP_TGZ_NAME. This option
+            is also used to account for the different headers and library names.
+
    4. Test HDF5
 
       To test the build, navigate to your build directory and execute:
@@ -676,6 +684,7 @@ ZLIB_USE_EXTERNAL           "Use External Library Building for ZLIB"
 SZIP_USE_EXTERNAL           "Use External Library Building for SZIP"              0
 if (HDF5_ENABLE_SZIP_SUPPORT)
     HDF5_ENABLE_SZIP_ENCODING "Use SZip Encoding"                                 OFF
+    USE_LIBAEC                "Use libaec szip replacement"                       OFF
 if (WINDOWS)
     H5_DEFAULT_PLUGINDIR    "%ALLUSERSPROFILE%/hdf5/lib/plugin"
 else ()
diff --git a/release_docs/README_HDF5_CMake b/release_docs/README_HDF5_CMake
index 126a4cd..3325e8c 100644
--- a/release_docs/README_HDF5_CMake
+++ b/release_docs/README_HDF5_CMake
@@ -7,7 +7,7 @@ This tar file contains
     HDF5config.cmake    CMake scripts for building HDF5
     HDF5options.cmake
     hdf5-1.10.7         HDF5 1.10.7 source
-    SZip.tar.gz         source for building SZIP
+    LIBAEC.tar.gz       source for building SZIP replacement
     ZLib.tar.gz         source for building ZLIB
 
 For more information about building HDF5 with CMake, see USING_HDF5_CMake.txt in
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index 78f40bb..c8155c7 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -47,6 +47,16 @@ New Features
 
     Configuration:
     -------------
+    - CMake option to use AEC (open source SZip) library instead of SZip
+
+      The open source AEC library is a replacement library for SZip. In
+      order to use it for hdf5 the libaec CMake source was changed to add
+      "-fPIC" and exclude test files. Autotools does not build the
+      compression libraries within hdf5 builds. New option USE_LIBAEC is
+      required to compensate for the different files produced by AEC build.
+
+      (ADB - 2020/04/22, OESS-65)
+
     - CMake ConfigureChecks.cmake file now uses CHECK_STRUCT_HAS_MEMBER
 
       Some handcrafted tests in HDFTests.c has been removed and the CMake