Revert zlib default setting

CMakeFilters.cmake

@@ -85,7 +85,7 @@ endif ()
 if(NOT DEFINED ZLIBNG_PACKAGE_NAME)
   set(ZLIBNG_PACKAGE_NAME "zlib-ng")
 endif ()
-option (HDF5_ENABLE_ZLIB_SUPPORT "Enable Zlib Filters" OFF)
+option (HDF5_ENABLE_ZLIB_SUPPORT "Enable Zlib Filters" ON)
 if (HDF5_ENABLE_ZLIB_SUPPORT)
   if (NOT H5_ZLIB_HEADER)
     if (NOT ZLIB_USE_EXTERNAL)

config/cmake/scripts/HDF5options.cmake

@@ -66,11 +66,11 @@ set (ADD_BUILD_OPTIONS "${ADD_BUILD_OPTIONS} -DHDF5_ALLOW_EXTERNAL_SUPPORT:STRIN
 #set(ENV{SZIP_ROOT} "some_location")
 #set (ADD_BUILD_OPTIONS "${ADD_BUILD_OPTIONS} -DSZIP_LIBRARY:FILEPATH=some_location/lib/szlib.lib -DSZIP_INCLUDE_DIR:PATH=some_location/include")
 
-### enable using ext zlib
-#set (ADD_BUILD_OPTIONS "${ADD_BUILD_OPTIONS} -DHDF5_ENABLE_ZLIB_SUPPORT:BOOL=ON")
-### disable using ext szip
-#set (ADD_BUILD_OPTIONS "${ADD_BUILD_OPTIONS} -DHDF5_ENABLE_SZIP_SUPPORT:BOOL=OFF")
-#set (ADD_BUILD_OPTIONS "${ADD_BUILD_OPTIONS} -DHDF5_ENABLE_SZIP_ENCODING:BOOL=OFF")
+### disable using ext zlib
+#set (ADD_BUILD_OPTIONS "${ADD_BUILD_OPTIONS} -DHDF5_ENABLE_ZLIB_SUPPORT:BOOL=OFF")
+### enable using ext szip
+#set (ADD_BUILD_OPTIONS "${ADD_BUILD_OPTIONS} -DHDF5_ENABLE_SZIP_SUPPORT:BOOL=ON")
+#set (ADD_BUILD_OPTIONS "${ADD_BUILD_OPTIONS} -DHDF5_ENABLE_SZIP_ENCODING:BOOL=ON")
 
 ####      package examples       ####
 #set (ADD_BUILD_OPTIONS "${ADD_BUILD_OPTIONS} -DHDF5_PACK_EXAMPLES:BOOL=ON -DHDF5_EXAMPLES_COMPRESSED:STRING=HDF5Examples-2.0.3-Source.tar.gz -DHDF5_EXAMPLES_COMPRESSED_DIR:PATH=${CTEST_SCRIPT_DIRECTORY}")

release_docs/INSTALL_CMake.txt

@@ -939,7 +939,7 @@ if (BUILD_TESTING)
 HDF5_ALLOW_EXTERNAL_SUPPORT "Allow External Library Building (NO GIT TGZ)"  "NO"
 HDF5_ENABLE_PLUGIN_SUPPORT  "Enable PLUGIN Filters"                         OFF
 HDF5_ENABLE_SZIP_SUPPORT    "Use SZip Filter"                               OFF
-HDF5_ENABLE_ZLIB_SUPPORT    "Enable Zlib Filters"                           OFF
+HDF5_ENABLE_ZLIB_SUPPORT    "Enable Zlib Filters"                           ON
 
 if (HDF5_USE_ZLIB_NG)
     ZLIBNG_USE_EXTERNAL     "Use External Library Building for ZLIBNG"      OFF

release_docs/NEWSLETTER.txt

@@ -7,8 +7,8 @@ Features included for the next major release:
 
       The option has been renamed to HDF5_ENABLE_ZLIB_SUPPORT to be consistent
       with the naming of other options.
-      *** Also, the option defaults to OFF. This requires the user to explicitly ***
-      *** enable zlib support when configuring the library. ***
+      Also, since the option defaults to ON, the configure will fail if the
+      zlib library is not found on the system or if it fails to build inline.
 
 
 ----------------------------------------------------------------------------

release_docs/RELEASE.txt

@@ -51,8 +51,8 @@ New Features
 
       The option has been renamed to HDF5_ENABLE_ZLIB_SUPPORT to be consistent
       with the naming of other options.
-      *** Also, the option defaults to OFF. This requires the user to explicitly ***
-      *** enable zlib support when configuring the library. ***
+      Also, since the option defaults to ON, the configure will fail if the
+      zlib library is not found on the system or if it fails to build inline.
 
     - Added support for MinGW + MSYS2 when building with CMake