Merge branch 'hdf5_1_8' of ssh://bitbucket.hdfgroup.org:7999/~hdftest/hdf5_hft into hdf5_1_8

6 files changed, 731 insertions, 244 deletions

diff --git a/config/cmake/CTestCustom.cmake b/config/cmake/CTestCustom.cmake
index fd901f8..0a1c5bd 100644
--- a/config/cmake/CTestCustom.cmake
+++ b/config/cmake/CTestCustom.cmake
@@ -30,11 +30,11 @@ set (CTEST_CUSTOM_WARNING_EXCEPTION
     "POSIX name for this item is deprecated"
     "disabling jobserver mode"
     "config.cmake.xlatefile.c"
-    "warning.*implicit declaration of function"
     "warning.*unknown pragma"
     "warning.*unrecognized .pragma"
     "note: expanded from macro"
-#    "fpp:[ \t]*warning:[ \t]*cannot remove H5_DEBUG_API - not a predefined macro"
+    # HDDFFV-11074
+    "This directive is not standard"
 )
 
 set (CTEST_CUSTOM_MEMCHECK_IGNORE
diff --git a/config/cmake/HDF5UseFortran.cmake b/config/cmake/HDF5UseFortran.cmake
index c5d8200..12df64a 100644
--- a/config/cmake/HDF5UseFortran.cmake
+++ b/config/cmake/HDF5UseFortran.cmake
@@ -406,22 +406,6 @@ endif ()
 
 set (${HDF_PREFIX}_FORTRAN_SIZEOF_LONG_DOUBLE ${${HDF_PREFIX}_SIZEOF_LONG_DOUBLE})
 
-# remove the invalid kind from the list
-if (NOT(${${HDF_PREFIX}_SIZEOF___FLOAT128} EQUAL 0))
-   if (NOT(${${HDF_PREFIX}_SIZEOF___FLOAT128} EQUAL ${max_real_fortran_sizeof})
-       AND NOT(${${HDF_PREFIX}_FORTRAN_SIZEOF_LONG_DOUBLE} EQUAL ${max_real_fortran_sizeof})
-       # account for the fact that the C compiler can have 16-byte __float128 and the fortran compiler only has 8-byte doubles,
-       # so we don't want to remove the 8-byte fortran doubles.
-       AND NOT(${PAC_FORTRAN_NATIVE_DOUBLE_SIZEOF} EQUAL ${max_real_fortran_sizeof}))
-     message (WARNING "
-          Fortran REAL(KIND=${max_real_fortran_kind}) is $max_real_fortran_sizeof Bytes, but no corresponding C float type exists of that size
-                                           !!! Fortran interfaces will not be generated for REAL(KIND=${max_real_fortran_kind}) !!!")
-     string (REGEX REPLACE ",[0-9]+}" "}" PAC_FC_ALL_REAL_KINDS ${PAC_FC_ALL_REAL_KINDS})
-     string (REGEX REPLACE ",[0-9]+}" "}" PAC_FC_ALL_REAL_KINDS_SIZEOF ${PAC_FC_ALL_REAL_KINDS_SIZEOF})
-     math (EXPR NUM_RKIND "${NUM_RKIND} - 1")
-   endif ()
-endif ()
-
 set (${HDF_PREFIX}_H5CONFIG_F_NUM_RKIND "INTEGER, PARAMETER :: num_rkinds = ${NUM_RKIND}")
 
 string (REGEX REPLACE "{" "" OUT_VAR ${PAC_FC_ALL_REAL_KINDS})
@@ -435,7 +419,7 @@ set (${HDF_PREFIX}_H5CONFIG_F_RKIND_SIZEOF "INTEGER, DIMENSION(1:num_rkinds) ::
 ENABLE_LANGUAGE (C)
 
 if (NOT CMAKE_VERSION VERSION_LESS "3.14.0")
-include (CheckCSourceRuns)
+  include (CheckCSourceRuns)
 else ()
 #-----------------------------------------------------------------------------
 # The provided CMake C macros don't provide a general compile/run function
@@ -489,59 +473,6 @@ macro (C_RUN FUNCTION_NAME SOURCE_CODE RETURN_VAR)
 endmacro ()
 endif ()
 
-set (PROG_SRC
-    "
-#include <float.h>
-#include <stdio.h>
-#define CHECK_FLOAT128 ${${HDF_PREFIX}_SIZEOF___FLOAT128}
-#if CHECK_FLOAT128!=0
-# if ${${HDF_PREFIX}_HAVE_QUADMATH_H}!=0
-#include <quadmath.h>
-# endif
-# ifdef FLT128_DIG
-#define C_FLT128_DIG FLT128_DIG
-# else
-#define C_FLT128_DIG 0
-# endif
-#else
-#define C_FLT128_DIG 0
-#endif
-#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
-#define C_LDBL_DIG DECIMAL_DIG
-#else
-#define C_LDBL_DIG LDBL_DIG
-#endif
-   int main() {
-       printf(\"%d\\\\n%d\\\\n\", C_LDBL_DIG, C_FLT128_DIG)\\\;
-       return 1\\\;
-   }
-     "
-)
-
-if (NOT CMAKE_VERSION VERSION_LESS "3.14.0")
-  check_c_source_runs (${PROG_SRC} PROG_OUTPUT)
-else ()
-  C_RUN ("maximum decimal precision for C" ${PROG_SRC} PROG_OUTPUT)
-endif ()
-
-# dnl The output from the above program will be:
-# dnl    -- LINE 1 --  long double decimal precision
-# dnl    -- LINE 2 --  __float128 decimal precision
-
-# Convert the string to a list of strings by replacing the carriage return with a semicolon
-string (REGEX REPLACE "\n" ";" PROG_OUTPUT "${PROG_OUTPUT}")
-
-list (GET PROG_OUTPUT 0 LDBL_DIG)
-list (GET PROG_OUTPUT 1 FLT128_DIG)
-
-if (${HDF_PREFIX}_SIZEOF___FLOAT128 EQUAL 0 OR FLT128_DIG EQUAL 0)
-  set (${HDF_PREFIX}_HAVE_FLOAT128 0)
-  set (${HDF_PREFIX}_SIZEOF___FLOAT128 0)
-  set (${HDF_PREFIX}_PAC_C_MAX_REAL_PRECISION ${LDBL_DIG})
-else ()
-  set(${HDF_PREFIX}_PAC_C_MAX_REAL_PRECISION ${FLT128_DIG})
-endif ()
-
 
 # Setting definition if there is a 16 byte fortran integer
 string (FIND ${PAC_FC_ALL_INTEGER_KINDS_SIZEOF} "16" pos)
diff --git a/config/cmake/HDFCXXCompilerFlags.cmake b/config/cmake/HDFCXXCompilerFlags.cmake
new file mode 100644
index 0000000..6aa8784
--- /dev/null
+++ b/config/cmake/HDFCXXCompilerFlags.cmake
@@ -0,0 +1,441 @@
+#
+# Copyright by The HDF Group.
+# All rights reserved.
+#
+# This file is part of HDF5.  The full HDF5 copyright notice, including
+# terms governing use, modification, and redistribution, is contained in
+# the COPYING file, which can be found at the root of the source code
+# distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.
+# If you do not have access to either file, you may request a copy from
+# help@hdfgroup.org.
+#
+set(CMAKE_CXX_STANDARD 98)
+set(CMAKE_CXX_STANDARD_REQUIRED TRUE)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+macro (ADD_H5_FLAGS h5_flag_var infile)
+  file (STRINGS ${infile} TEST_FLAG_STREAM)
+  #message (STATUS "TEST_FLAG_STREAM=${TEST_FLAG_STREAM}")
+  list (LENGTH TEST_FLAG_STREAM len_flag)
+  if (len_flag GREATER 0)
+    math (EXPR _FP_LEN "${len_flag} - 1")
+    foreach (line RANGE 0 ${_FP_LEN})
+      list (GET TEST_FLAG_STREAM ${line} str_flag)
+      string (REGEX REPLACE "^#.*" "" str_flag "${str_flag}")
+      #message (STATUS "str_flag=${str_flag}")
+      if (str_flag)
+        list (APPEND ${h5_flag_var} "${str_flag}")
+      endif ()
+    endforeach ()
+  endif ()
+  #message (STATUS "h5_flag_var=${${h5_flag_var}}")
+endmacro ()
+
+set (CMAKE_CXX_FLAGS "${CMAKE_CXX_SANITIZER_FLAGS} ${CMAKE_CXX_FLAGS}")
+message (STATUS "Warnings Configuration: CXX default:  ${CMAKE_CXX_FLAGS}")
+#-----------------------------------------------------------------------------
+# Compiler specific flags : Shouldn't there be compiler tests for these
+#-----------------------------------------------------------------------------
+if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
+  set (CMAKE_CXX_FLAGS "${CMAKE_ANSI_CFLAGS} ${CMAKE_CXX_FLAGS}")
+  if (${HDF_CFG_NAME} MATCHES "Debug")
+    if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0)
+      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Og -ftrapv -fno-common")
+    endif ()
+  else ()
+    if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0)
+      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fstdarg-opt")
+    endif ()
+  endif ()
+endif ()
+
+#-----------------------------------------------------------------------------
+# Option to allow the user to disable compiler warnings
+#-----------------------------------------------------------------------------
+if (HDF5_DISABLE_COMPILER_WARNINGS)
+  message (STATUS "....Compiler warnings are suppressed")
+  # MSVC uses /w to suppress warnings.  It also complains if another
+  # warning level is given, so remove it.
+  if (MSVC)
+    set (HDF5_WARNINGS_BLOCKED 1)
+    if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
+      string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W0")
+    endif ()
+  endif ()
+  if (WIN32)
+    add_definitions (-D_CRT_SECURE_NO_WARNINGS)
+  endif ()
+
+  # Most compilers use -w to suppress warnings.
+  if (NOT HDF5_WARNINGS_BLOCKED)
+    if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
+      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -w")
+    endif ()
+  endif ()
+endif ()
+
+#-----------------------------------------------------------------------------
+# HDF5 library compile options
+#-----------------------------------------------------------------------------
+
+#-----------------------------------------------------------------------------
+# CDash is configured to only allow 3000 warnings, so
+# break into groups (from the config/gnu-flags file)
+#-----------------------------------------------------------------------------
+if (NOT MSVC)
+  if (${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
+    list (APPEND HDF5_CMAKE_CXX_FLAGS "-erroff=%none -DBSD_COMP")
+  else ()
+    # General flags
+    #
+    # Note that some of the flags listed here really should be developer
+    # flags (listed in a separate variable, below) but we put them here
+    # because they are not raised by the current code and we'd like to
+    # know if they do start showing up.
+    #
+    # NOTE: Don't add -Wpadded here since we can't/won't fix the (many)
+    # warnings that are emitted. If you need it, add it at configure time.
+    if (CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
+      ADD_H5_FLAGS (HDF5_CMAKE_CXX_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/general")
+      if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 18.0)
+        list (APPEND H5_CXXFLAGS0 "-Wextra-tokens -Wformat -Wformat-security -Wic-pointer -Wshadow")
+        list (APPEND H5_CXXFLAGS0 "-Wsign-compare -Wtrigraphs -Wwrite-strings")
+      endif()
+    elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+      if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
+        # autotools always add the C flags with the CXX flags
+        ADD_H5_FLAGS (HDF5_CMAKE_CXX_FLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/general")
+        ADD_H5_FLAGS (HDF5_CMAKE_CXX_FLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/cxx-general")
+      endif ()
+    elseif (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+      ADD_H5_FLAGS (HDF5_CMAKE_CXX_FLAGS "${HDF5_SOURCE_DIR}/config/clang-warnings/general")
+    elseif (CMAKE_CXX_COMPILER_ID STREQUAL "PGI")
+      list (APPEND HDF5_CMAKE_CXX_FLAGS "-Minform=inform")
+    endif ()
+    message (STATUS "CMAKE_CXX_FLAGS_GENERAL=${HDF5_CMAKE_CXX_FLAGS}")
+  endif ()
+
+  #-----------------------------------------------------------------------------
+  # Option to allow the user to enable developer warnings
+  # Developer warnings (suggestions from gcc, not code problems)
+  #-----------------------------------------------------------------------------
+  if (HDF5_ENABLE_DEV_WARNINGS)
+    message (STATUS "....HDF5 developer group warnings are enabled")
+  #  if (CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
+  #    list (APPEND H5_CXXFLAGS0 "-Winline -Wreorder -Wport -Wstrict-aliasing")
+  #  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+    if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+      # autotools always add the C flags with the CXX flags
+      ADD_H5_FLAGS (H5_CXXFLAGS0 "${HDF5_SOURCE_DIR}/config/gnu-warnings/developer-general")
+  #  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+  #    ADD_H5_FLAGS (H5_CXXFLAGS0 "${HDF5_SOURCE_DIR}/config/clang-warnings/developer-general")
+    endif ()
+  else ()
+    if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+      # autotools always add the C flags with the CXX flags
+      ADD_H5_FLAGS (H5_CXXFLAGS0 "${HDF5_SOURCE_DIR}/config/gnu-warnings/no-developer-general")
+  #  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+  #    ADD_H5_FLAGS (H5_CXXFLAGS0 "${HDF5_SOURCE_DIR}/config/clang-warnings/no-developer-general")
+    endif ()
+  endif ()
+
+  if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+    # Append warning flags that only gcc 4.3+ knows about
+    # autotools always add the C flags with the CXX flags
+    ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.3")
+    #
+    # Technically, variable-length arrays are part of the C99 standard, but
+    #   we should approach them a bit cautiously... Only needed for gcc 4.X
+    if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0)
+      # autotools always add the C flags with the CXX flags
+      ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.2-4.last")
+    endif ()
+
+    # Append more extra warning flags that only gcc 4.4+ know about
+    if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.4)
+      # autotools always add the C flags with the CXX flags
+      ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.4")
+    endif ()
+
+    # Append more extra warning flags that only gcc 4.5+ know about
+    if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.5)
+      # autotools always add the C flags with the CXX flags
+      ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.5")
+      if (HDF5_ENABLE_DEV_WARNINGS)
+        # autotools always add the C flags with the CXX flags
+        ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/developer-4.5")
+      else ()
+        # autotools always add the C flags with the CXX flags
+        ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/no-developer-4.5")
+      endif ()
+    endif ()
+
+    # Append more extra warning flags that only gcc 4.6 and less know about
+    if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.7)
+      # autotools always add the C flags with the CXX flags
+      ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.2-4.6")
+    endif ()
+
+    # Append more extra warning flags that only gcc 4.5-4.6 know about
+    if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.5 AND CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7)
+      # autotools always add the C flags with the CXX flags
+      ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.5-4.6")
+    endif ()
+
+    # Append more extra warning flags that only gcc 4.6+ know about
+    if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.6)
+      # autotools always add the C flags with the CXX flags
+      ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.6")
+      if (HDF5_ENABLE_DEV_WARNINGS)
+        # autotools always add the C flags with the CXX flags
+        ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/developer-4.6")
+      else ()
+        # autotools always add the C flags with the CXX flags
+        ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/no-developer-4.6")
+      endif ()
+    endif ()
+
+    # Append more extra warning flags that only gcc 4.7+ know about
+    if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.7)
+      # autotools always add the C flags with the CXX flags
+      ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.7")
+      if (HDF5_ENABLE_DEV_WARNINGS)
+        # autotools always add the C flags with the CXX flags
+        ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/developer-4.7")
+      else ()
+        # autotools always add the C flags with the CXX flags
+        ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/no-developer-4.7")
+      endif ()
+    endif ()
+
+    # Append more extra warning flags that only gcc 4.8+ know about
+    if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.8)
+      ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.8")
+      if (HDF5_ENABLE_DEV_WARNINGS)
+        ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/developer-4.8")
+      else ()
+        ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/no-developer-4.8")
+      endif ()
+    endif ()
+
+    # Append more extra warning flags that only gcc 4.9+ know about
+    if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.9)
+      # autotools always add the C flags with the CXX flags
+      ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.9")
+      ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/cxx-4.9")
+    endif ()
+
+    # Append more extra warning flags that only gcc 5.1+ know about
+    if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0)
+      # autotools always add the C flags with the CXX flags
+      ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/5")
+      ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/error-5")
+    endif ()
+
+    # Append more extra warning flags that only gcc 6.x+ know about
+    if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 6.0)
+      # autotools always add the C flags with the CXX flags
+      ADD_H5_FLAGS (H5_CXXFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/6")
+    endif ()
+
+    # Append more extra warning flags that only gcc 7.x+ know about
+    if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.0)
+      # autotools always add the C flags with the CXX flags
+      ADD_H5_FLAGS (H5_CXxFLAGS2 "${HDF5_SOURCE_DIR}/config/gnu-warnings/7")
+      if (HDF5_ENABLE_DEV_WARNINGS)
+        # autotools always add the C flags with the CXX flags
+        ADD_H5_FLAGS (H5_CXXFLAGS2 "${HDF5_SOURCE_DIR}/config/gnu-warnings/developer-7")
+      #else ()
+      #  ADD_H5_FLAGS (H5_CXXFLAGS2 "${HDF5_SOURCE_DIR}/config/gnu-warnings/no-developer-7")
+      endif ()
+    endif ()
+
+    # Append more extra warning flags that only gcc 8.x+ know about
+    if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 8.0)
+      # autotools always add the C flags with the CXX flags
+      ADD_H5_FLAGS (H5_CXXFLAGS3 "${HDF5_SOURCE_DIR}/config/gnu-warnings/8")
+      if (HDF5_ENABLE_DEV_WARNINGS)
+        # autotools always add the C flags with the CXX flags
+        ADD_H5_FLAGS (H5_CXXFLAGS3 "${HDF5_SOURCE_DIR}/config/gnu-warnings/developer-8")
+      else ()
+        # autotools always add the C flags with the CXX flags
+        ADD_H5_FLAGS (H5_CXXFLAGS3 "${HDF5_SOURCE_DIR}/config/gnu-warnings/no-developer-8")
+      endif ()
+    endif ()
+
+    # Append more extra warning flags that only gcc 9.x+ know about
+    if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 9.0)
+      # autotools always add the C flags with the CXX flags
+      ADD_H5_FLAGS (H5_CXXFLAGS4 "${HDF5_SOURCE_DIR}/config/gnu-warnings/9")
+    endif ()
+  endif ()
+else ()
+    list (APPEND HDF5_CMAKE_CXX_FLAGS "/EHsc")
+endif ()
+
+#-----------------------------------------------------------------------------
+# Option to allow the user to enable all warnings
+#-----------------------------------------------------------------------------
+if (HDF5_ENABLE_ALL_WARNINGS)
+  message (STATUS "....All Warnings are enabled")
+  if (MSVC)
+    if (HDF5_ENABLE_DEV_WARNINGS)
+      if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
+        string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+        list (APPEND HDF5_CMAKE_CXX_FLAGS "/Wall /wd4668")
+      endif ()
+    else ()
+      if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
+        string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+        list (APPEND HDF5_CMAKE_CXX_FLAGS "/W3")
+      endif ()
+    endif ()
+  else ()
+    if (CMAKE_COMPILER_IS_GNUCC)
+      if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
+        list (APPEND HDF5_CMAKE_CXX_FLAGS ${H5_CXXFLAGS0} ${H5_CXXFLAGS1} ${H5_CXXFLAGS2} ${H5_CXXFLAGS3} ${H5_CXXFLAGS4})
+      endif ()
+    endif ()
+  endif ()
+endif ()
+
+#-----------------------------------------------------------------------------
+# Option to allow the user to enable warnings by groups
+#-----------------------------------------------------------------------------
+if (HDF5_ENABLE_GROUPZERO_WARNINGS)
+  message (STATUS "....Group Zero warnings are enabled")
+  if (MSVC)
+    if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
+      string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " HDF5_CMAKE_CXX_FLAGS "${HDF5_CMAKE_CXX_FLAGS}")
+      list (APPEND HDF5_CMAKE_CXX_FLAGS "/W1")
+    endif ()
+  else ()
+    if (CMAKE_COMPILER_IS_GNUCC)
+      if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
+        list (APPEND HDF5_CMAKE_CXX_FLAGS ${H5_CFLAGS0})
+      endif ()
+    endif ()
+  endif ()
+endif ()
+
+#-----------------------------------------------------------------------------
+# Option to allow the user to enable warnings by groups
+#-----------------------------------------------------------------------------
+if (HDF5_ENABLE_GROUPONE_WARNINGS)
+  message (STATUS "....Group One warnings are enabled")
+  if (MSVC)
+    if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
+      string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " HDF5_CMAKE_CXX_FLAGS "${HDF5_CMAKE_CXX_FLAGS}")
+      list (APPEND HDF5_CMAKE_CXX_FLAGS "/W2")
+    endif ()
+  else ()
+    if (CMAKE_COMPILER_IS_GNUCC)
+      if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
+        list (APPEND HDF5_CMAKE_CXX_FLAGS ${H5_CFLAGS1})
+      endif ()
+    endif ()
+  endif ()
+endif ()
+
+#-----------------------------------------------------------------------------
+# Option to allow the user to enable warnings by groups
+#-----------------------------------------------------------------------------
+if (HDF5_ENABLE_GROUPTWO_WARNINGS)
+  message (STATUS "....Group Two warnings are enabled")
+  if (MSVC)
+    if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
+      string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " HDF5_CMAKE_CXX_FLAGS "${HDF5_CMAKE_CXX_FLAGS}")
+      list (APPEND HDF5_CMAKE_CXX_FLAGS "/W3")
+    endif ()
+  else ()
+    if (CMAKE_COMPILER_IS_GNUCC)
+      if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
+        list (APPEND HDF5_CMAKE_CXX_FLAGS ${H5_CFLAGS2})
+      endif ()
+    endif ()
+  endif ()
+endif ()
+
+#-----------------------------------------------------------------------------
+# Option to allow the user to enable warnings by groups
+#-----------------------------------------------------------------------------
+if (HDF5_ENABLE_GROUPTHREE_WARNINGS)
+  message (STATUS "....Group Three warnings are enabled")
+  if (MSVC)
+    if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
+      string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " HDF5_CMAKE_CXX_FLAGS "${HDF5_CMAKE_CXX_FLAGS}")
+      list (APPEND HDF5_CMAKE_CXX_FLAGS "/W4")
+    endif ()
+  else ()
+    if (CMAKE_COMPILER_IS_GNUCC)
+      if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
+        list (APPEND HDF5_CMAKE_CXX_FLAGS ${H5_CFLAGS3})
+      endif ()
+    endif ()
+  endif ()
+endif ()
+
+#-----------------------------------------------------------------------------
+# Option to allow the user to enable warnings by groups
+#-----------------------------------------------------------------------------
+if (HDF5_ENABLE_GROUPFOUR_WARNINGS)
+  message (STATUS "....Group Four warnings are enabled")
+  if (NOT MSVC)
+    if (CMAKE_COMPILER_IS_GNUCC)
+      if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
+        list (APPEND HDF5_CMAKE_CXX_FLAGS ${H5_CFLAGS4})
+      endif ()
+    endif ()
+  endif ()
+endif ()
+
+#-----------------------------------------------------------------------------
+# This is in here to help some of the GCC based IDES like Eclipse
+# and code blocks parse the compiler errors and warnings better.
+#-----------------------------------------------------------------------------
+if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
+  set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fmessage-length=0")
+endif ()
+
+#-----------------------------------------------------------------------------
+# Option for --enable-symbols
+# This option will force/override the default setting for all configurations
+#-----------------------------------------------------------------------------
+if (HDF5_ENABLE_SYMBOLS MATCHES "YES")
+  if(CMAKE_CXX_COMPILER_LOADED)
+    if (CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
+      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g")
+    elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g")
+    endif ()
+  endif ()
+elseif (HDF5_ENABLE_SYMBOLS MATCHES "NO")
+  if(CMAKE_CXX_COMPILER_LOADED)
+    if (CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
+      set (CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -Wl,-s")
+    elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s")
+    endif ()
+  endif ()
+endif ()
+
+#-----------------------------------------------------------------------------
+# Option for --enable-profiling
+# This option will force/override the default setting for all configurations
+#-----------------------------------------------------------------------------
+if (HDF5_ENABLE_PROFILING)
+  if(CMAKE_CXX_COMPILER_LOADED)
+    list (APPEND HDF5_CMAKE_CXX_FLAGS "${PROFILE_CXXFLAGS}")
+  endif ()
+endif ()
+
+#-----------------------------------------------------------------------------
+# Option for --enable-optimization
+# This option will force/override the default setting for all configurations
+#-----------------------------------------------------------------------------
+if (HDF5_ENABLE_OPTIMIZATION)
+  if(CMAKE_CXX_COMPILER_LOADED)
+    list (APPEND HDF5_CMAKE_CXX_FLAGS "${OPTIMIZE_CXXFLAGS}")
+  endif ()
+endif ()
diff --git a/config/cmake/HDFCompilerFlags.cmake b/config/cmake/HDFCompilerFlags.cmake
index 17b0854..72141c0 100644
--- a/config/cmake/HDFCompilerFlags.cmake
+++ b/config/cmake/HDFCompilerFlags.cmake
@@ -23,7 +23,7 @@ macro (ADD_H5_FLAGS h5_flag_var infile)
       string (REGEX REPLACE "^#.*" "" str_flag "${str_flag}")
       #message (STATUS "str_flag=${str_flag}")
       if (str_flag)
-        set (${h5_flag_var} "${${h5_flag_var}} ${str_flag}")
+        list (APPEND ${h5_flag_var} "${str_flag}")
       endif ()
     endforeach ()
   endif ()
@@ -49,18 +49,6 @@ if (CMAKE_COMPILER_IS_GNUCC)
     endif ()
   endif ()
 endif ()
-if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
-  set (CMAKE_CXX_FLAGS "${CMAKE_ANSI_CFLAGS} ${CMAKE_CXX_FLAGS}")
-  if (${HDF_CFG_NAME} MATCHES "Debug")
-    if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0)
-      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Og -ftrapv -fno-common")
-    endif ()
-  else ()
-    if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0)
-      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fstdarg-opt")
-    endif ()
-  endif ()
-endif ()
 
 #-----------------------------------------------------------------------------
 # Option to allow the user to disable compiler warnings
@@ -74,10 +62,6 @@ if (HDF5_DISABLE_COMPILER_WARNINGS)
     set (HDF5_WARNINGS_BLOCKED 1)
     string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
     set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /W0")
-    if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
-      string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W0")
-    endif ()
   endif ()
   if (WIN32)
     add_definitions (-D_CRT_SECURE_NO_WARNINGS)
@@ -91,19 +75,20 @@ if (HDF5_DISABLE_COMPILER_WARNINGS)
   # Most compilers use -w to suppress warnings.
   if (NOT HDF5_WARNINGS_BLOCKED)
     set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -w")
-    if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
-      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -w")
-    endif ()
   endif ()
 endif ()
 
 #-----------------------------------------------------------------------------
+# HDF5 library compile options
+#-----------------------------------------------------------------------------
+
+#-----------------------------------------------------------------------------
 # CDash is configured to only allow 3000 warnings, so
 # break into groups (from the config/gnu-flags file)
 #-----------------------------------------------------------------------------
-if (NOT MSVC AND CMAKE_COMPILER_IS_GNUCC)
+if (NOT MSVC)
   if (${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
-    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -erroff=%none -DBSD_COMP")
+    list (APPEND HDF5_CMAKE_C_FLAGS "-erroff=%none -DBSD_COMP")
   else ()
     # General flags
     #
@@ -115,137 +100,160 @@ if (NOT MSVC AND CMAKE_COMPILER_IS_GNUCC)
     # NOTE: Don't add -Wpadded here since we can't/won't fix the (many)
     # warnings that are emitted. If you need it, add it at configure time.
     if (CMAKE_C_COMPILER_ID STREQUAL "Intel")
-      ADD_H5_FLAGS (CMAKE_C_FLAGS_GENERAL "${HDF5_SOURCE_DIR}/config/intel-warnings-general")
-      message (STATUS "CMAKE_C_FLAGS_GENERAL=${CMAKE_C_FLAGS_GENERAL}")
-      set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_GENERAL}")
-      set (H5_CFLAGS0 "${H5_CFLAGS0} -Wcomment -Wdeprecated -Wmain -Wmissing-declarations -Wmissing-prototypes -Wp64 -Wpointer-arith")
-      set (H5_CFLAGS0 "${H5_CFLAGS0} -Wreturn-type -Wstrict-prototypes -Wuninitialized")
-      set (H5_CFLAGS0 "${H5_CFLAGS0} -Wunknown-pragmas -Wunused-function -Wunused-variable")
+      ADD_H5_FLAGS (HDF5_CMAKE_C_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/general")
+      list (APPEND H5_CFLAGS0 "-Wcomment -Wdeprecated -Wmain -Wmissing-declarations -Wmissing-prototypes -Wp64 -Wpointer-arith")
+      list (APPEND H5_CFLAGS0 "-Wreturn-type -Wstrict-prototypes -Wuninitialized")
+      list (APPEND H5_CFLAGS0 "-Wunknown-pragmas -Wunused-function -Wunused-variable")
       # this is just a failsafe
-      set (H5_CFLAGS0 "${H5_CFLAGS0} -finline-functions")
+      list (APPEND H5_CFLAGS0 "-finline-functions")
       if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 18.0)
-        set (H5_CFLAGS0 "${H5_CFLAGS0} -Wextra-tokens -Wformat -Wformat-security -Wic-pointer -Wshadow")
-        set (H5_CFLAGS0 "${H5_CFLAGS0} -Wsign-compare -Wtrigraphs -Wwrite-strings")
+        list (APPEND H5_CFLAGS0 "-Wextra-tokens -Wformat -Wformat-security -Wic-pointer -Wshadow")
+        list (APPEND H5_CFLAGS0 "-Wsign-compare -Wtrigraphs -Wwrite-strings")
       endif()
     elseif (CMAKE_C_COMPILER_ID STREQUAL "GNU")
-      ADD_H5_FLAGS (CMAKE_C_FLAGS_GENERAL "${HDF5_SOURCE_DIR}/config/gnu-warnings-general")
-      message (STATUS "CMAKE_C_FLAGS_GENERAL=${CMAKE_C_FLAGS_GENERAL}")
-      set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_GENERAL}")
-      set (H5_CFLAGS0 "${H5_CFLAGS0} -Wbad-function-cast -Wcast-align")
-      set (H5_CFLAGS0 "${H5_CFLAGS0} -Wdeclaration-after-statement -Wdisabled-optimization")
-      set (H5_CFLAGS0 "${H5_CFLAGS0} -Wmissing-declarations")
-      set (H5_CFLAGS0 "${H5_CFLAGS0} -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wpacked")
-      set (H5_CFLAGS0 "${H5_CFLAGS0} -Wredundant-decls -Wstrict-prototypes -Wswitch-enum -Wswitch-default")
-      set (H5_CFLAGS0 "${H5_CFLAGS0} -Wunused-macros -Wunsafe-loop-optimizations")
+      ADD_H5_FLAGS (HDF5_CMAKE_C_FLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/general")
+      ADD_H5_FLAGS (H5_CFLAGS0 "${HDF5_SOURCE_DIR}/config/gnu-warnings/error-general")
       # gcc automatically inlines based on the optimization level
       # this is just a failsafe
-      set (H5_CFLAGS0 "${H5_CFLAGS0} -finline-functions")
-      message (STATUS "H5_CFLAGS0=${H5_CFLAGS0}")
+      list (APPEND H5_CFLAGS0 "-finline-functions")
+    elseif (CMAKE_C_COMPILER_ID STREQUAL "Clang")
+      ADD_H5_FLAGS (HDF5_CMAKE_C_FLAGS "${HDF5_SOURCE_DIR}/config/clang-warnings/general")
+      ADD_H5_FLAGS (H5_CFLAGS0 "${HDF5_SOURCE_DIR}/config/clang-warnings/error-general")
+    elseif (CMAKE_C_COMPILER_ID STREQUAL "PGI")
+      list (APPEND HDF5_CMAKE_C_FLAGS "-Minform=inform")
     endif ()
+    message (STATUS "CMAKE_C_FLAGS_GENERAL=${HDF5_CMAKE_C_FLAGS}")
   endif ()
 
-    #-----------------------------------------------------------------------------
-    # Option to allow the user to enable developer warnings
-    # Developer warnings (suggestions from gcc, not code problems)
-    #-----------------------------------------------------------------------------
-    option (HDF5_ENABLE_DEV_WARNINGS "Enable HDF5 developer group warnings" OFF)
-    if (HDF5_ENABLE_DEV_WARNINGS)
-      message (STATUS "....HDF5 developer group warnings are enabled")
-      if (CMAKE_C_COMPILER_ID STREQUAL "Intel")
-        set (H5_CFLAGS0 "${H5_CFLAGS0} -Winline -Wreorder -Wport -Wstrict-aliasing")
-      elseif (CMAKE_C_COMPILER_ID STREQUAL "GNU")
-        ADD_H5_FLAGS (CMAKE_C_FLAGS_DEV_GENERAL "${HDF5_SOURCE_DIR}/config/gnu-warnings-developer-general")
-        set (H5_CFLAGS0 "${H5_CFLAGS0} ${CMAKE_C_FLAGS_DEV_GENERAL}")
-      endif ()
-    else ()
-      if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
-        ADD_H5_FLAGS (CMAKE_C_FLAGS_NO_DEV_GENERAL "${HDF5_SOURCE_DIR}/config/gnu-warnings-no-developer-general")
-        set (H5_CFLAGS0 "${H5_CFLAGS0} ${CMAKE_C_FLAGS_NO_DEV_GENERAL}")
-      endif ()
+  #-----------------------------------------------------------------------------
+  # Option to allow the user to enable developer warnings
+  # Developer warnings (suggestions from gcc, not code problems)
+  #-----------------------------------------------------------------------------
+  option (HDF5_ENABLE_DEV_WARNINGS "Enable HDF5 developer group warnings" OFF)
+  if (HDF5_ENABLE_DEV_WARNINGS)
+    message (STATUS "....HDF5 developer group warnings are enabled")
+    if (CMAKE_C_COMPILER_ID STREQUAL "Intel")
+      list (APPEND H5_CFLAGS0 "-Winline -Wreorder -Wport -Wstrict-aliasing")
+    elseif (CMAKE_C_COMPILER_ID STREQUAL "GNU")
+      ADD_H5_FLAGS (H5_CFLAGS0 "${HDF5_SOURCE_DIR}/config/gnu-warnings/developer-general")
+    elseif (CMAKE_C_COMPILER_ID STREQUAL "Clang")
+      ADD_H5_FLAGS (H5_CFLAGS0 "${HDF5_SOURCE_DIR}/config/clang-warnings/developer-general")
+    endif ()
+  else ()
+    if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
+      ADD_H5_FLAGS (H5_CFLAGS0 "${HDF5_SOURCE_DIR}/config/gnu-warnings/no-developer-general")
+    elseif (CMAKE_C_COMPILER_ID STREQUAL "Clang")
+      ADD_H5_FLAGS (H5_CFLAGS0 "${HDF5_SOURCE_DIR}/config/clang-warnings/no-developer-general")
     endif ()
+  endif ()
 
 
-    if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
-      # 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
-      set (H5_CFLAGS1 "${H5_CFLAGS1} -Wlogical-op -Wlarger-than=2560 -Wvla")
-
-      # Append more extra warning flags that only gcc 4.4+ know about
-      set (H5_CFLAGS1 "${H5_CFLAGS1} -Wsync-nand -Wframe-larger-than=16384 -Wpacked-bitfield-compat")
+  if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
+    # Append warning flags that only gcc 4.3+ knows about
+    ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.3")
+    #
+    # Technically, variable-length arrays are part of the C99 standard, but
+    #   we should approach them a bit cautiously... Only needed for gcc 4.X
+    if (CMAKE_C_COMPILER_VERSION VERSION_LESS 5.0)
+      ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.2-4.last")
+    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")
     endif ()
 
     # Append more extra warning flags that only gcc 4.5+ know about
-    if (CMAKE_C_COMPILER_ID STREQUAL "GNU" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.5)
-      set (H5_CFLAGS1 "${H5_CFLAGS1} -Wstrict-overflow=5 -Wjump-misses-init")
-        if (HDF5_ENABLE_DEV_WARNINGS)
-          set (H5_CFLAGS0 "${H5_CFLAGS0} -Wunsuffixed-float-constants")
-        else ()
-          set (H5_CFLAGS0 "${H5_CFLAGS0} -Wno-unsuffixed-float-constants")
-        endif ()
+    if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.5)
+      ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.5")
+      if (HDF5_ENABLE_DEV_WARNINGS)
+        ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/developer-4.5")
+      else ()
+        ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/no-developer-4.5")
+      endif ()
+    endif ()
+
+    # Append more extra warning flags that only gcc 4.6 and less know about
+    if (CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7)
+      ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.2-4.6")
+    endif ()
+
+    # Append more extra warning flags that only gcc 4.5-4.6 know about
+    if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.5 AND CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7)
+      ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.5-4.6")
     endif ()
 
     # Append more extra warning flags that only gcc 4.6+ know about
-    if (CMAKE_C_COMPILER_ID STREQUAL "GNU" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.6)
-      set (H5_CFLAGS2 "${H5_CFLAGS2} -Wdouble-promotion -Wtrampolines")
+    if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.6)
+      ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.6")
       if (HDF5_ENABLE_DEV_WARNINGS)
-        set (H5_CFLAGS2 "${H5_CFLAGS2} -Wsuggest-attribute=const")
+        ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/developer-4.6")
       else ()
-        set (H5_CFLAGS2 "${H5_CFLAGS2} -Wno-suggest-attribute=const")
+        ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/no-developer-4.6")
       endif ()
     endif ()
 
     # Append more extra warning flags that only gcc 4.7+ know about
-    if (CMAKE_C_COMPILER_ID STREQUAL "GNU" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7)
-      set (H5_CFLAGS2 "${H5_CFLAGS2} -Wstack-usage=8192 -Wvector-operation-performance")
+    if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7)
+      ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.7")
       if (HDF5_ENABLE_DEV_WARNINGS)
-        set (H5_CFLAGS2 "${H5_CFLAGS2} -Wsuggest-attribute=pure -Wsuggest-attribute=noreturn")
+        ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/developer-4.7")
       else ()
-        set (H5_CFLAGS2 "${H5_CFLAGS2} -Wno-suggest-attribute=pure -Wno-suggest-attribute=noreturn")
+        ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/no-developer-4.7")
       endif ()
     endif ()
 
     # Append more extra warning flags that only gcc 4.8+ know about
-    if (CMAKE_C_COMPILER_ID STREQUAL "GNU" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.8)
+    if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.8)
+      ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.8")
       if (HDF5_ENABLE_DEV_WARNINGS)
-        set (H5_CFLAGS2 "${H5_CFLAGS2} -Wsuggest-attribute=format")
+        ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/developer-4.8")
       else ()
-        set (H5_CFLAGS2 "${H5_CFLAGS2} -Wno-suggest-attribute=format")
+        ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/no-developer-4.8")
       endif ()
     endif ()
 
     # Append more extra warning flags that only gcc 4.9+ know about
-    if (CMAKE_C_COMPILER_ID STREQUAL "GNU" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.9)
-      set (H5_CFLAGS2 "${H5_CFLAGS2} -Wdate-time")
+    if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.9)
+      ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/4.9")
     endif ()
 
     # Append more extra warning flags that only gcc 5.1+ know about
-    if (CMAKE_C_COMPILER_ID STREQUAL "GNU" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 5.1)
-      set (H5_CFLAGS3 "${H5_CFLAGS3} -Warray-bounds=2 -Wc99-c11-compat")
+    if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 5.0)
+      ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/5")
+      ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/error-5")
     endif ()
 
     # 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 "${H5_CFLAGS4} -Wnull-dereference -Wunused-const-variable -Wduplicated-cond -Whsa -Wnormalized")
+    if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 6.0)
+      ADD_H5_FLAGS (H5_CFLAGS1 "${HDF5_SOURCE_DIR}/config/gnu-warnings/6")
     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 "${H5_CFLAGS4} -Walloc-zero -Walloca -Wduplicated-branches -Wformat-overflow=2 -Wformat-truncation=1 -Wimplicit-fallthrough=5 -Wrestrict")
+    if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 7.0)
+      ADD_H5_FLAGS (H5_CFLAGS2 "${HDF5_SOURCE_DIR}/config/gnu-warnings/7")
+      if (HDF5_ENABLE_DEV_WARNINGS)
+        ADD_H5_FLAGS (H5_CFLAGS2 "${HDF5_SOURCE_DIR}/config/gnu-warnings/developer-7")
+      #else ()
+      #  ADD_H5_FLAGS (H5_CFLAGS2 "${HDF5_SOURCE_DIR}/config/gnu-warnings/no-developer-7")
+      endif ()
     endif ()
 
     # Append more extra warning flags that only gcc 8.x+ know about
-    if (CMAKE_C_COMPILER_ID STREQUAL "GNU" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 8.0)
-      set (H5_CFLAGS4 "${H5_CFLAGS4} -Wattribute-alias -Wcast-align=strict -Wshift-overflow=2 -Wno-suggest-attribute=cold -Wno-suggest-attribute=malloc")
+    if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 8.0)
+      ADD_H5_FLAGS (H5_CFLAGS3 "${HDF5_SOURCE_DIR}/config/gnu-warnings/8")
+      if (HDF5_ENABLE_DEV_WARNINGS)
+        ADD_H5_FLAGS (H5_CFLAGS3 "${HDF5_SOURCE_DIR}/config/gnu-warnings/developer-8")
+      else ()
+        ADD_H5_FLAGS (H5_CFLAGS3 "${HDF5_SOURCE_DIR}/config/gnu-warnings/no-developer-8")
+      endif ()
     endif ()
 
     # Append more extra warning flags that only gcc 9.x+ know about
-    if (CMAKE_C_COMPILER_ID STREQUAL "GNU" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 9.0)
-      set (H5_CFLAGS4 "${H5_CFLAGS4} -Wattribute-alias=2 -Wmissing-profile")
+    if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 9.0)
+      ADD_H5_FLAGS (H5_CFLAGS4 "${HDF5_SOURCE_DIR}/config/gnu-warnings/9")
     endif ()
-elseif (CMAKE_C_COMPILER_ID STREQUAL "PGI")
-  set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Minform=inform")
+  endif ()
 endif ()
 
 #-----------------------------------------------------------------------------
@@ -257,22 +265,14 @@ if (HDF5_ENABLE_ALL_WARNINGS)
   if (MSVC)
     if (HDF5_ENABLE_DEV_WARNINGS)
       string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
-      set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /Wall /wd4668")
-      if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
-        string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-        set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /Wall /wd4668")
-      endif ()
+      list (APPEND HDF5_CMAKE_C_FLAGS "/Wall /wd4668")
     else ()
       string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
-      set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /W3")
-      if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
-        string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-        set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W3")
-      endif ()
+      list (APPEND HDF5_CMAKE_C_FLAGS "/W3")
     endif ()
   else ()
     if (CMAKE_COMPILER_IS_GNUCC)
-      set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${H5_CFLAGS0} ${H5_CFLAGS1} ${H5_CFLAGS2}")
+      list (APPEND HDF5_CMAKE_C_FLAGS ${H5_CFLAGS0} ${H5_CFLAGS1} ${H5_CFLAGS2} ${H5_CFLAGS3} ${H5_CFLAGS4})
     endif ()
   endif ()
 endif ()
@@ -284,15 +284,11 @@ option (HDF5_ENABLE_GROUPZERO_WARNINGS "Enable group zero warnings" OFF)
 if (HDF5_ENABLE_GROUPZERO_WARNINGS)
   message (STATUS "....Group Zero warnings are enabled")
   if (MSVC)
-    string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
-    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /W1")
-    if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
-      string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W1")
-    endif ()
+    string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " HDF5_CMAKE_C_FLAGS "${HDF5_CMAKE_C_FLAGS}")
+    list (APPEND HDF5_CMAKE_C_FLAGS "/W1")
   else ()
     if (CMAKE_COMPILER_IS_GNUCC)
-      set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${H5_CFLAGS0}")
+      list (APPEND HDF5_CMAKE_C_FLAGS ${H5_CFLAGS0})
     endif ()
   endif ()
 endif ()
@@ -304,14 +300,12 @@ option (HDF5_ENABLE_GROUPONE_WARNINGS "Enable group one warnings" OFF)
 if (HDF5_ENABLE_GROUPONE_WARNINGS)
   message (STATUS "....Group One warnings are enabled")
   if (MSVC)
-    string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
-    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /W2")
-    if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
-      string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W2")
-    endif ()
+    string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " HDF5_CMAKE_C_FLAGS "${HDF5_CMAKE_C_FLAGS}")
+    list (APPEND HDF5_CMAKE_C_FLAGS "/W2")
   else ()
-    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${H5_CFLAGS1}")
+    if (CMAKE_COMPILER_IS_GNUCC)
+      list (APPEND HDF5_CMAKE_C_FLAGS ${H5_CFLAGS1})
+    endif ()
   endif ()
 endif ()
 
@@ -322,14 +316,12 @@ option (HDF5_ENABLE_GROUPTWO_WARNINGS "Enable group two warnings" OFF)
 if (HDF5_ENABLE_GROUPTWO_WARNINGS)
   message (STATUS "....Group Two warnings are enabled")
   if (MSVC)
-    string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
-    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /W3")
-    if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
-      string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W3")
-    endif ()
+    string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " HDF5_CMAKE_C_FLAGS "${HDF5_CMAKE_C_FLAGS}")
+    list (APPEND HDF5_CMAKE_C_FLAGS "/W3")
   else ()
-    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${H5_CFLAGS2}")
+    if (CMAKE_COMPILER_IS_GNUCC)
+      list (APPEND HDF5_CMAKE_C_FLAGS ${H5_CFLAGS2})
+    endif ()
   endif ()
 endif ()
 
@@ -340,14 +332,12 @@ option (HDF5_ENABLE_GROUPTHREE_WARNINGS "Enable group three warnings" OFF)
 if (HDF5_ENABLE_GROUPTHREE_WARNINGS)
   message (STATUS "....Group Three warnings are enabled")
   if (MSVC)
-    string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
-    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /W4")
-    if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
-      string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
-    endif ()
+    string (REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " " HDF5_CMAKE_C_FLAGS "${HDF5_CMAKE_C_FLAGS}")
+    list (APPEND HDF5_CMAKE_C_FLAGS "/W4")
   else ()
-    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${H5_CFLAGS3}")
+    if (CMAKE_COMPILER_IS_GNUCC)
+      list (APPEND HDF5_CMAKE_C_FLAGS ${H5_CFLAGS3})
+    endif ()
   endif ()
 endif ()
 
@@ -358,7 +348,9 @@ option (HDF5_ENABLE_GROUPFOUR_WARNINGS "Enable group four warnings" OFF)
 if (HDF5_ENABLE_GROUPFOUR_WARNINGS)
   message (STATUS "....Group Four warnings are enabled")
   if (NOT MSVC)
-    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${H5_CFLAGS4}")
+    if (CMAKE_COMPILER_IS_GNUCC)
+      list (APPEND HDF5_CMAKE_C_FLAGS ${H5_CFLAGS4})
+    endif ()
   endif ()
 endif ()
 
@@ -369,9 +361,6 @@ endif ()
 if (CMAKE_COMPILER_IS_GNUCC)
   set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fmessage-length=0")
 endif ()
-if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_LOADED)
-  set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fmessage-length=0")
-endif ()
 
 #-----------------------------------------------------------------------------
 # Option for --enable-asserts
@@ -401,26 +390,12 @@ if (HDF5_ENABLE_SYMBOLS MATCHES "YES")
   elseif (CMAKE_C_COMPILER_ID STREQUAL "GNU")
     set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g -fno-omit-frame-pointer")
   endif ()
-  if(CMAKE_CXX_COMPILER_LOADED)
-    if (CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
-      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g")
-    elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
-      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g")
-    endif ()
-  endif ()
 elseif (HDF5_ENABLE_SYMBOLS MATCHES "NO")
   if (CMAKE_C_COMPILER_ID STREQUAL "Intel")
     set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wl,-s")
   elseif (CMAKE_C_COMPILER_ID STREQUAL "GNU")
     set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -s")
   endif ()
-  if(CMAKE_CXX_COMPILER_LOADED)
-    if (CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
-      set (CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -Wl,-s")
-    elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
-      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s")
-    endif ()
-  endif ()
 endif ()
 MARK_AS_ADVANCED (HDF5_ENABLE_SYMBOLS)
 
@@ -430,10 +405,7 @@ MARK_AS_ADVANCED (HDF5_ENABLE_SYMBOLS)
 #-----------------------------------------------------------------------------
 option (HDF5_ENABLE_PROFILING "Enable profiling flags independently from the build mode." OFF)
 if (HDF5_ENABLE_PROFILING)
-  set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${PROFILE_CFLAGS}")
-  if(CMAKE_CXX_COMPILER_LOADED)
-    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${PROFILE_CXXFLAGS}")
-  endif ()
+  list (APPEND HDF5_CMAKE_C_FLAGS "${PROFILE_CFLAGS}")
 endif ()
 MARK_AS_ADVANCED (HDF5_ENABLE_PROFILING)
 
@@ -443,9 +415,6 @@ MARK_AS_ADVANCED (HDF5_ENABLE_PROFILING)
 #-----------------------------------------------------------------------------
 option (HDF5_ENABLE_OPTIMIZATION "Enable optimization flags/settings independently from the build mode" OFF)
 if (HDF5_ENABLE_OPTIMIZATION)
-  set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OPTIMIZE_CFLAGS}")
-  if(CMAKE_CXX_COMPILER_LOADED)
-    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OPTIMIZE_CXXFLAGS}")
-  endif ()
+  list (APPEND HDF5_CMAKE_C_FLAGS "${OPTIMIZE_CFLAGS}")
 endif ()
 MARK_AS_ADVANCED (HDF5_ENABLE_OPTIMIZATION)
diff --git a/config/cmake/HDFFortranCompilerFlags.cmake b/config/cmake/HDFFortranCompilerFlags.cmake
new file mode 100644
index 0000000..a56ef28
--- /dev/null
+++ b/config/cmake/HDFFortranCompilerFlags.cmake
@@ -0,0 +1,147 @@
+#
+# Copyright by The HDF Group.
+# All rights reserved.
+#
+# This file is part of HDF5.  The full HDF5 copyright notice, including
+# terms governing use, modification, and redistribution, is contained in
+# the COPYING file, which can be found at the root of the source code
+# distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.
+# If you do not have access to either file, you may request a copy from
+# help@hdfgroup.org.
+#
+
+macro (ADD_H5_FFLAGS h5_fflag_var infile)
+  file (STRINGS ${infile} TEST_FLAG_STREAM)
+  #message (STATUS "TEST_FLAG_STREAM=${TEST_FLAG_STREAM}")
+  list (LENGTH TEST_FLAG_STREAM len_flag)
+  if (len_flag GREATER 0)
+    math (EXPR _FP_LEN "${len_flag} - 1")
+    foreach (line RANGE 0 ${_FP_LEN})
+      list (GET TEST_FLAG_STREAM ${line} str_flag)
+      string (REGEX REPLACE "^#.*" "" str_flag "${str_flag}")
+      #message (STATUS "str_flag=${str_flag}")
+      if (str_flag)
+        list (APPEND ${h5_fflag_var} "${str_flag}")
+      endif ()
+    endforeach ()
+  endif ()
+  #message (STATUS "h5_fflag_var=${${h5_fflag_var}}")
+endmacro ()
+
+message (STATUS "Warnings Configuration: default Fortran: ${CMAKE_Fortran_FLAGS}")
+
+#-----------------------------------------------------------------------------
+# Option to allow the user to disable compiler warnings
+#-----------------------------------------------------------------------------
+if (HDF5_DISABLE_COMPILER_WARNINGS)
+  message (STATUS "....Compiler warnings are suppressed")
+  # MSVC uses /w to suppress warnings.  It also complains if another
+  # warning level is given, so remove it.
+  if (MSVC)
+    set (HDF5_WARNINGS_BLOCKED 1)
+    if (CMAKE_Fortran_COMPILER_ID STREQUAL "Intel")
+      set (CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} /warn:none")
+    endif ()
+  endif ()
+  if (WIN32)
+    add_definitions (-D_CRT_SECURE_NO_WARNINGS)
+  endif ()
+  # Borland uses -w- to suppress warnings.
+  if (BORLAND)
+    set (HDF5_WARNINGS_BLOCKED 1)
+    set (CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -w-")
+  endif ()
+
+  # Most compilers use -w to suppress warnings.
+  if (NOT HDF5_WARNINGS_BLOCKED)
+    set (CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -w")
+  endif ()
+endif ()
+
+#-----------------------------------------------------------------------------
+# HDF5 library compile options
+#-----------------------------------------------------------------------------
+
+#-----------------------------------------------------------------------------
+# CDash is configured to only allow 3000 warnings, so
+# break into groups (from the config/gnu-flags file)
+#-----------------------------------------------------------------------------
+if (NOT MSVC)
+  # General flags
+  if (CMAKE_Fortran_COMPILER_ID STREQUAL "Intel")
+    ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/ifort-general")
+    list (APPEND HDF5_CMAKE_Fortran_FLAGS "-stand:f03" "-free")
+  elseif (CMAKE_Fortran_COMPILER_ID STREQUAL "GNU")
+    ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/gfort-general")
+    list (APPEND HDF5_CMAKE_Fortran_FLAGS "-ffree-form" "-fimplicit-none")
+    if (CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 8.0 AND NOT CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 4.6)
+      list (APPEND HDF5_CMAKE_Fortran_FLAGS "-std=f2008ts")
+    else ()
+      list (APPEND HDF5_CMAKE_Fortran_FLAGS "-std=f2008")
+    endif ()
+  elseif (CMAKE_Fortran_COMPILER_ID STREQUAL "PGI")
+    list (APPEND HDF5_CMAKE_Fortran_FLAGS "-Mfreeform" "-Mdclchk" "-Mstandard" "-Mallocatable=03")
+  endif ()
+  message (STATUS "HDF5_CMAKE_Fortran_FLAGS=${HDF5_CMAKE_Fortran_FLAGS}")
+
+  if (CMAKE_Fortran_COMPILER_ID STREQUAL "GNU")
+    # Append warning flags that only gcc 4.4+ knows about
+    ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/gfort-4.4")
+
+    # Append more extra warning flags that only gcc 4.5+ know about
+    if (NOT CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 4.5)
+      ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/gfort-4.5")
+    endif ()
+
+    # Append more extra warning flags that only gcc 4.6+ know about
+    #if (NOT CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 4.6)
+    #  ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/gfort-4.6")
+    #endif ()
+
+    # Append more extra warning flags that only gcc 4.7+ know about
+    if (NOT CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 4.7)
+      ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/gfort-4.7")
+    endif ()
+
+    # Append more extra warning flags that only gcc 4.8+ know about
+    if (NOT CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 4.8)
+      ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/gfort-4.8")
+    endif ()
+
+    # Append more extra warning flags that only gcc 4.9+ know about
+    #if (NOT CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 4.9)
+    #  ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/gfort-4.9")
+    #endif ()
+
+    # Append more extra warning flags that only gcc 5.1+ know about
+    if (NOT CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 5.0)
+      ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/gfort-5")
+    endif ()
+
+    # Append more extra warning flags that only gcc 6.x+ know about
+    if (NOT CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 6.0)
+      ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/gfort-6")
+    endif ()
+
+    # Append more extra warning flags that only gcc 7.x+ know about
+    #if (NOT CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 7.0)
+    #  ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/gfort-7")
+    #endif ()
+
+    # Append more extra warning flags that only gcc 8.x+ know about
+    if (NOT CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 8.0)
+      ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/gfort-8")
+    endif ()
+
+    # Append more extra warning flags that only gcc 9.x+ know about
+    #if (NOT CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 9.0)
+    #  ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/gfort-9")
+    #endif ()
+  endif ()
+else ()
+  if (CMAKE_Fortran_COMPILER_ID STREQUAL "Intel")
+    #ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/win-ifort-general")
+    list (APPEND HDF5_CMAKE_Fortran_FLAGS "/warn:all" "/stand:f03" "/free")
+  endif ()
+endif ()
+
diff --git a/config/cmake/libhdf5.settings.cmake.in b/config/cmake/libhdf5.settings.cmake.in
index 7bfadb1..4945463 100644
--- a/config/cmake/libhdf5.settings.cmake.in
+++ b/config/cmake/libhdf5.settings.cmake.in
@@ -1,12 +1,11 @@
-      SUMMARY OF THE HDF5 CONFIGURATION
-      =================================
+        SUMMARY OF THE HDF5 CONFIGURATION
+        =================================
 
 General Information:
 -------------------
                    HDF5 Version: @HDF5_PACKAGE_VERSION_STRING@
                   Configured on: @CONFIG_DATE@
                   Configured by: @CMAKE_GENERATOR@
-                 Configure mode: CMAKE @CMAKE_VERSION@
                     Host system: @CMAKE_HOST_SYSTEM@
               Uname information: @CMAKE_SYSTEM_NAME@
                        Byte sex: @BYTESEX@
@@ -39,7 +38,7 @@ Languages:
                     H5_CPPFLAGS: @H5_CPPFLAGS@
                     AM_CPPFLAGS: @AM_CPPFLAGS@
                          CFLAGS: @CMAKE_C_FLAGS@
-                      H5_CFLAGS: @H5_CFLAGS@
+                      H5_CFLAGS: @HDF5_CMAKE_C_FLAGS@
                       AM_CFLAGS: @AM_CFLAGS@
                Shared C Library: @H5_ENABLE_SHARED_LIB@
                Static C Library: @H5_ENABLE_STATIC_LIB@
@@ -48,7 +47,7 @@ Languages:
 @BUILD_FORTRAN_CONDITIONAL_TRUE@               Fortran Compiler: @CMAKE_Fortran_COMPILER@ @CMAKE_Fortran_COMPILER_VERSION@
 @BUILD_FORTRAN_CONDITIONAL_TRUE@          Fortran 2003 Compiler: @HDF5_ENABLE_F2003@
 @BUILD_FORTRAN_CONDITIONAL_TRUE@                  Fortran Flags: @CMAKE_Fortran_FLAGS@
-@BUILD_FORTRAN_CONDITIONAL_TRUE@               H5 Fortran Flags: @H5_FCFLAGS@
+@BUILD_FORTRAN_CONDITIONAL_TRUE@               H5 Fortran Flags: @HDF5_CMAKE_Fortran_FLAGS@
 @BUILD_FORTRAN_CONDITIONAL_TRUE@               AM Fortran Flags: @AM_FCFLAGS@
 @BUILD_FORTRAN_CONDITIONAL_TRUE@         Shared Fortran Library: @H5_ENABLE_SHARED_LIB@
 @BUILD_FORTRAN_CONDITIONAL_TRUE@         Static Fortran Library: @H5_ENABLE_STATIC_LIB@
@@ -56,7 +55,7 @@ Languages:
                             C++: @HDF5_BUILD_CPP_LIB@
 @BUILD_CXX_CONDITIONAL_TRUE@                   C++ Compiler: @CMAKE_CXX_COMPILER@ @CMAKE_CXX_COMPILER_VERSION@
 @BUILD_CXX_CONDITIONAL_TRUE@                      C++ Flags: @CMAKE_CXX_FLAGS@
-@BUILD_CXX_CONDITIONAL_TRUE@                   H5 C++ Flags: @H5_CXXFLAGS@
+@BUILD_CXX_CONDITIONAL_TRUE@                   H5 C++ Flags: @HDF5_CMAKE_CXX_FLAGS@
 @BUILD_CXX_CONDITIONAL_TRUE@                   AM C++ Flags: @AM_CXXFLAGS@
 @BUILD_CXX_CONDITIONAL_TRUE@             Shared C++ Library: @H5_ENABLE_SHARED_LIB@
 @BUILD_CXX_CONDITIONAL_TRUE@             Static C++ Library: @H5_ENABLE_STATIC_LIB@