Merge pull request #1168 in HDFFV/hdf5 from ~BYRN/hdf5_adb:hdf5_1_10 to hdf5_1_10

HDFFV-9755, HDFFV-10508 documentation
Fortran configuration fixes
MPI generator expressions

* commit '4f5bdadd50783be3d20949048ede3ec3543ba5a4':
  Merge from develop

12 files changed, 89 insertions, 60 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b0640b9..6a6d708 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -430,7 +430,7 @@ set (CMAKE_POSITION_INDEPENDENT_CODE ON)
 #-----------------------------------------------------------------------------
 # Option to Build Static executables
 #-----------------------------------------------------------------------------
-option (BUILD_STATIC_EXECS "Build Static Executabless" OFF)
+option (BUILD_STATIC_EXECS "Build Static Executables" OFF)
 if (BUILD_STATIC_EXECS)
   if (NOT WIN32)
     set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -static")
diff --git a/config/cmake/ConfigureChecks.cmake b/config/cmake/ConfigureChecks.cmake
index 0d955d0..6d1e3ce 100644
--- a/config/cmake/ConfigureChecks.cmake
+++ b/config/cmake/ConfigureChecks.cmake
@@ -167,12 +167,17 @@ endif ()
 # Check if C has __float128 extension
 #-----------------------------------------------------------------------------
 
-CHECK_TYPE_SIZE("__float128" SIZEOF___FLOAT128)
-if (${HAVE_SIZEOF___FLOAT128})
+CHECK_TYPE_SIZE("__float128" ${HDF_PREFIX}_SIZEOF___FLOAT128)
+if (${${HDF_PREFIX}_SIZEOF___FLOAT128})
   set (${HDF_PREFIX}_HAVE_FLOAT128 1)
 else ()
   set (${HDF_PREFIX}_HAVE_FLOAT128 0)
-  set (SIZEOF___FLOAT128 0)
+  set (${HDF_PREFIX}_SIZEOF___FLOAT128 0)
+endif ()
+
+CHECK_TYPE_SIZE("_Quad" ${HDF_PREFIX}_SIZEOF__QUAD)
+if (NOT ${${HDF_PREFIX}_SIZEOF__QUAD})
+  set (${HDF_PREFIX}_SIZEOF__QUAD 0)
 endif ()
 
 #-----------------------------------------------------------------------------
diff --git a/config/cmake/H5pubconf.h.in b/config/cmake/H5pubconf.h.in
index e4c9a2e..ccfe581 100644
--- a/config/cmake/H5pubconf.h.in
+++ b/config/cmake/H5pubconf.h.in
@@ -30,7 +30,7 @@
 #cmakedefine H5_AC_APPLE_UNIVERSAL_BUILD @H5_AC_APPLE_UNIVERSAL_BUILD@
 
 /* Define if C++ compiler recognizes offsetof */
-#cmakedefine H5_CXX_HAVE_OFFSETOF @H5_CXX_HAVE_OFFSETOF@
+#cmakedefine H5_CXX_HAVE_OFFSETOF @CXX_HAVE_OFFSETOF@
 
 /* Define the default plugins path to compile */
 #cmakedefine H5_DEFAULT_PLUGINDIR "@H5_DEFAULT_PLUGINDIR@"
@@ -74,7 +74,7 @@
 #define H5_Fortran_COMPILER_ID @CMAKE_Fortran_COMPILER_ID@
 
 /* Define valid Fortran INTEGER KINDs */
-#cmakedefine H5_H5CONFIG_F_IKIND @H5_HH5_H5CONFIG_F_NUM_RKIND5CONFIG_F_IKIND@
+#cmakedefine H5_H5CONFIG_F_IKIND @H5_H5CONFIG_F_IKIND@
 
 /* Define number of valid Fortran INTEGER KINDs */
 #cmakedefine H5_H5CONFIG_F_NUM_IKIND @H5_H5CONFIG_F_NUM_IKIND@
@@ -161,24 +161,12 @@
 /* Define to 1 if you have the `fseeko' function. */
 #cmakedefine H5_HAVE_FSEEKO @H5_HAVE_FSEEKO@
 
-/* Define to 1 if you have the `fseeko64' function. */
-#cmakedefine H5_HAVE_FSEEKO64 @H5_HAVE_FSEEKO64@
-
-/* Define to 1 if you have the `fstat64' function. */
-#cmakedefine H5_HAVE_FSTAT64 @H5_HAVE_FSTAT64@
-
-/* Define to 1 if you have the `ftello' function. */
-#cmakedefine H5_HAVE_FTELLO @H5_HAVE_FTELLO@
-
-/* Define to 1 if you have the `ftello64' function. */
-#cmakedefine H5_HAVE_FTELLO64 @H5_HAVE_FTELLO64@
-
-/* Define to 1 if you have the `ftruncate64' function. */
-#cmakedefine H5_HAVE_FTRUNCATE64 @H5_HAVE_FTRUNCATE64@
-
 /* Define if the compiler understands the __FUNCTION__ keyword */
 #cmakedefine H5_HAVE_FUNCTION @H5_HAVE_FUNCTION@
 
+/* Determine if INTEGER*16 is available */
+#cmakedefine H5_HAVE_Fortran_INTEGER_SIZEOF_16 @H5_HAVE_Fortran_INTEGER_SIZEOF_16@
+
 /* Define to 1 if you have the `GetConsoleScreenBufferInfo' function. */
 #cmakedefine H5_HAVE_GETCONSOLESCREENBUFFERINFO @H5_HAVE_GETCONSOLESCREENBUFFERINFO@
 
@@ -270,10 +258,10 @@
 /* Define to 1 if you have the <mpe.h> header file. */
 #cmakedefine H5_HAVE_MPE_H @H5_HAVE_MPE_H@
 
-/* Define if `MPI_Comm_c2f' and `MPI_Comm_f2c' exists */
+/* Define if MPI_Comm_c2f and MPI_Comm_f2c exists */
 #cmakedefine H5_HAVE_MPI_MULTI_LANG_Comm @H5_HAVE_MPI_MULTI_LANG_Comm@
 
-/* Define if `MPI_Info_c2f' and `MPI_Info_f2c' exists */
+/* Define if MPI_Info_c2f and MPI_Info_f2c exists */
 #cmakedefine H5_HAVE_MPI_MULTI_LANG_Info @H5_HAVE_MPI_MULTI_LANG_Info@
 
 /* Define if we have parallel support */
@@ -348,22 +336,22 @@
 /* Define to 1 if you have the `strdup' function. */
 #cmakedefine H5_HAVE_STRDUP @H5_HAVE_STRDUP@
 
-/* Define to 1 if you have the `strtoll' function. */
-#cmakedefine H5_HAVE_STRTOLL @H5_HAVE_STRTOLL@
-
-/* Define to 1 if you have the `strtoull' function. */
-#cmakedefine H5_HAVE_STRTOULL @H5_HAVE_STRTOULL@
-
 /* Define to 1 if you have the <strings.h> header file. */
 #cmakedefine H5_HAVE_STRINGS_H @H5_HAVE_STRINGS_H@
 
 /* Define to 1 if you have the <string.h> header file. */
 #cmakedefine H5_HAVE_STRING_H @H5_HAVE_STRING_H@
 
-/* Define if `struct text_info' is defined */
+/* Define to 1 if you have the `strtoll' function. */
+#cmakedefine H5_HAVE_STRTOLL @H5_HAVE_STRTOLL@
+
+/* Define to 1 if you have the `strtoull' function. */
+#cmakedefine H5_HAVE_STRTOULL @H5_HAVE_STRTOULL@
+
+/* Define if struct text_info is defined */
 #cmakedefine H5_HAVE_STRUCT_TEXT_INFO @H5_HAVE_STRUCT_TEXT_INFO@
 
-/* Define if `struct videoconfig' is defined */
+/* Define if struct videoconfig is defined */
 #cmakedefine H5_HAVE_STRUCT_VIDEOCONFIG @H5_HAVE_STRUCT_VIDEOCONFIG@
 
 /* Define to 1 if you have the `symlink' function. */
@@ -402,7 +390,7 @@
 /* Define if we have thread safe support */
 #cmakedefine H5_HAVE_THREADSAFE @H5_HAVE_THREADSAFE@
 
-/* Define if `timezone' is a global variable */
+/* Define if timezone is a global variable */
 #cmakedefine H5_HAVE_TIMEZONE @H5_HAVE_TIMEZONE@
 
 /* Define if the ioctl TIOCGETD is defined */
@@ -414,7 +402,7 @@
 /* Define to 1 if you have the `tmpfile' function. */
 #cmakedefine H5_HAVE_TMPFILE @H5_HAVE_TMPFILE@
 
-/* Define if `tm_gmtoff' is a member of `struct tm' */
+/* Define if tm_gmtoff is a member of struct tm */
 #cmakedefine H5_HAVE_TM_GMTOFF @H5_HAVE_TM_GMTOFF@
 
 /* Define to 1 if you have the <unistd.h> header file. */
@@ -435,7 +423,7 @@
 /* Define if your system has window style path name. */
 #cmakedefine H5_HAVE_WINDOW_PATH @H5_HAVE_WINDOW_PATH@
 
-/* Define to 1 if you have the <winsock.h> header file. */
+/* Define to 1 if you have the <winsock2.h> header file. */
 #cmakedefine H5_HAVE_WINSOCK2_H @H5_HAVE_WINSOCK2_H@
 
 /* Define to 1 if you have the <zlib.h> header file. */
@@ -453,7 +441,7 @@
 /* Define if the compiler understands __inline__ */
 #cmakedefine H5_HAVE___INLINE__ @H5_HAVE___INLINE__@
 
-/* Define if HDF5's high-level library headers should be included in hdf5.h */
+/* Define if the high-level library headers should be included in hdf5.h */
 #cmakedefine H5_INCLUDE_HL @H5_INCLUDE_HL@
 
 /* Define if your system can convert long double to (unsigned) long long
diff --git a/config/cmake/HDF5UseFortran.cmake b/config/cmake/HDF5UseFortran.cmake
index 0e948fe..1f66bad 100644
--- a/config/cmake/HDF5UseFortran.cmake
+++ b/config/cmake/HDF5UseFortran.cmake
@@ -23,9 +23,9 @@ include (CheckFortranFunctionExists)
 CHECK_INCLUDE_FILES(quadmath.h C_HAVE_QUADMATH)
 
 if (${C_HAVE_QUADMATH})
-  set(${HDF_PREFIX}_HAVE_QUADMATH 1)
+  set(${HDF_PREFIX}_HAVE_QUADMATH_H 1)
 else ()
-  set(${HDF_PREFIX}_HAVE_QUADMATH 0)
+  set(${HDF_PREFIX}_HAVE_QUADMATH_H 0)
 endif ()
 
 # The provided CMake Fortran macros don't provide a general compile/run function
@@ -341,8 +341,8 @@ endif ()
 set (${HDF_PREFIX}_FORTRAN_SIZEOF_LONG_DOUBLE ${${HDF_PREFIX}_SIZEOF_LONG_DOUBLE})
 
 # remove the invalid kind from the list
-if (NOT(${SIZEOF___FLOAT128} EQUAL 0))
-   if (NOT(${SIZEOF___FLOAT128} EQUAL ${max_real_fortran_sizeof})
+if (NOT(${${HDF_PREFIX}_SIZEOF___FLOAT128} EQUAL 0))
+   if (NOT(${${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.
@@ -423,9 +423,9 @@ set (PROG_SRC
     "
 #include <float.h>
 #include <stdio.h>
-#define CHECK_FLOAT128 ${SIZEOF___FLOAT128}
+#define CHECK_FLOAT128 ${${HDF_PREFIX}_SIZEOF___FLOAT128}
 #if CHECK_FLOAT128!=0
-# if ${${HDF_PREFIX}_HAVE_QUADMATH}!=0
+# if ${${HDF_PREFIX}_HAVE_QUADMATH_H}!=0
 #include <quadmath.h>
 # endif
 # ifdef FLT128_DIG
@@ -460,9 +460,9 @@ string (REGEX REPLACE "\n" ";" PROG_OUTPUT "${PROG_OUTPUT}")
 list (GET PROG_OUTPUT 0 LDBL_DIG)
 list (GET PROG_OUTPUT 1 FLT128_DIG)
 
-if (SIZEOF___FLOAT128 EQUAL 0 OR FLT128_DIG EQUAL 0)
+if (${HDF_PREFIX}_SIZEOF___FLOAT128 EQUAL 0 OR FLT128_DIG EQUAL 0)
   set (${HDF_PREFIX}_HAVE_FLOAT128 0)
-  set (SIZEOF___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 ${FLT128_DIG})
diff --git a/config/cmake_ext_mod/ConfigureChecks.cmake b/config/cmake_ext_mod/ConfigureChecks.cmake
index b0deab7..9be30f7 100644
--- a/config/cmake_ext_mod/ConfigureChecks.cmake
+++ b/config/cmake_ext_mod/ConfigureChecks.cmake
@@ -322,17 +322,12 @@ if (NOT WINDOWS OR MINGW)
   HDF_FUNCTION_TEST (HAVE_OFF64_T)
   if (${HDF_PREFIX}_HAVE_OFF64_T)
     CHECK_FUNCTION_EXISTS (lseek64            ${HDF_PREFIX}_HAVE_LSEEK64)
-    CHECK_FUNCTION_EXISTS (fseeko64           ${HDF_PREFIX}_HAVE_FSEEKO64)
-    CHECK_FUNCTION_EXISTS (ftello64           ${HDF_PREFIX}_HAVE_FTELLO64)
-    CHECK_FUNCTION_EXISTS (ftruncate64        ${HDF_PREFIX}_HAVE_FTRUNCATE64)
   endif ()
 
   CHECK_FUNCTION_EXISTS (fseeko               ${HDF_PREFIX}_HAVE_FSEEKO)
-  CHECK_FUNCTION_EXISTS (ftello               ${HDF_PREFIX}_HAVE_FTELLO)
 
   HDF_FUNCTION_TEST (HAVE_STAT64_STRUCT)
   if (HAVE_STAT64_STRUCT)
-    CHECK_FUNCTION_EXISTS (fstat64            ${HDF_PREFIX}_HAVE_FSTAT64)
     CHECK_FUNCTION_EXISTS (stat64             ${HDF_PREFIX}_HAVE_STAT64)
   endif ()
 endif ()
diff --git a/config/cmake_ext_mod/HDFUseCXX.cmake b/config/cmake_ext_mod/HDFUseCXX.cmake
index 3afcdb6..f293ec5 100644
--- a/config/cmake_ext_mod/HDFUseCXX.cmake
+++ b/config/cmake_ext_mod/HDFUseCXX.cmake
@@ -98,11 +98,11 @@ endmacro ()
 if (CMAKE_CXX_COMPILER_LOADED)
   foreach (test
       OLD_HEADER_FILENAME
-      ${HDF_PREFIX}_NO_NAMESPACE
-      ${HDF_PREFIX}_NO_STD
+      HDF_NO_NAMESPACE
+      HDF_NO_STD
       BOOL_NOTDEFINED
       NO_STATIC_CAST
-      ${HDF_PREFIX}_CXX_HAVE_OFFSETOF
+      CXX_HAVE_OFFSETOF
   )
     HDF_CXX_FUNCTION_TEST (${test})
   endforeach ()
diff --git a/release_docs/INSTALL_CMake.txt b/release_docs/INSTALL_CMake.txt
index a5864be..708e713 100644
--- a/release_docs/INSTALL_CMake.txt
+++ b/release_docs/INSTALL_CMake.txt
@@ -643,6 +643,11 @@ else ()
     H5_DEFAULT_PLUGINDIR    "/usr/local/hdf5/lib/plugin"
 endif ()
 
+NOTE:
+  The BUILD_STATIC_EXECS ("Build Static Executables") option is only valid
+  on some unix operating systems. It adds the "-static" flag to cflags. This
+  flag is not available on windows and some modern linux systems will
+  ignore the flag.
 
 
 ========================================================================
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index 0aee89c..26ec906 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -39,6 +39,7 @@ CONTENTS
 - Tested Configuration Features Summary
 - More Tested Platforms
 - Known Problems
+- CMake vs. Autotools installations
 
 
 New Features
@@ -518,3 +519,38 @@ Known Problems
     in the HDF5 source. Please report any new problems found to
     help@hdfgroup.org.
 
+
+CMake vs. Autotools installations
+=================================
+While both build systems produce similar results, there are differences.
+Each system produces the same set of folders on linux (only CMake works
+on standard Windows); bin, include, lib and share. Autotools places the
+COPYING and RELEASE.txt file in the root folder, CMake places them in
+the share folder.
+
+The bin folder contains the tools and the build scripts. Additionally, CMake
+creates dynamic versions of the tools with the suffix "-shared". Autotools
+installs one set of tools depending on the "--enable-shared" configuration
+option.
+  build scripts
+  -------------
+  Autotools: h5c++, h5cc, h5fc
+  CMake: h5c++, h5cc, h5hlc++, h5hlcc
+
+The include folder holds the header files and the fortran mod files. CMake
+places the fortran mod files into separate shared and static subfolders,
+while Autotools places one set of mod files into the include folder. Because
+CMake produces a tools library, the header files for tools will appear in
+the include folder.
+
+The lib folder contains the library files, and CMake adds the pkgconfig
+subfolder with the hdf5*.pc files used by the bin/build scripts created by
+the CMake build. CMake separates the C interface code from the fortran code by
+creating C-stub libraries for each Fortran library. In addition, only CMake
+installs the tools library. The names of the szip libraries are different
+between the build systems.
+
+The share folder will have the most differences because CMake builds include
+a number of CMake specific files for support of CMake's find_package and support
+for the HDF5 Examples CMake project.
+
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 9a1f545..3c5526f 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -858,7 +858,7 @@ target_include_directories(H5detect PRIVATE "${HDF5_BINARY_DIR};$<$<BOOL:${HDF5_
 target_compile_definitions(H5detect PUBLIC ${HDF_EXTRA_C_FLAGS} ${HDF_EXTRA_FLAGS})
 TARGET_C_PROPERTIES (H5detect STATIC)
 target_link_libraries (H5detect
-    PRIVATE $<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_LIBRARIES}> $<$<PLATFORM_ID:Windows>:ws2_32.lib>
+    PRIVATE "$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_LIBRARIES}>" $<$<PLATFORM_ID:Windows>:ws2_32.lib>
     INTERFACE $<$<PLATFORM_ID:Emscripten>:"-O0">
 )
 
@@ -874,7 +874,7 @@ target_include_directories(H5make_libsettings PRIVATE "${HDF5_BINARY_DIR};$<$<BO
 target_compile_definitions(H5make_libsettings PUBLIC ${HDF_EXTRA_C_FLAGS} ${HDF_EXTRA_FLAGS})
 TARGET_C_PROPERTIES (H5make_libsettings STATIC)
 target_link_libraries (H5make_libsettings
-    PRIVATE $<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_LIBRARIES}> $<$<PLATFORM_ID:Windows>:ws2_32.lib>
+    PRIVATE "$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_LIBRARIES}>" $<$<PLATFORM_ID:Windows>:ws2_32.lib>
     INTERFACE $<$<PLATFORM_ID:Emscripten>:"-O0">
 )
 
@@ -911,7 +911,7 @@ target_compile_definitions(${HDF5_LIB_TARGET}
 )
 TARGET_C_PROPERTIES (${HDF5_LIB_TARGET} STATIC)
 target_link_libraries (${HDF5_LIB_TARGET}
-    PRIVATE ${LINK_LIBS} ${LINK_COMP_LIBS} $<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_LIBRARIES}>
+    PRIVATE ${LINK_LIBS} ${LINK_COMP_LIBS} "$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_LIBRARIES}>"
     PUBLIC $<$<NOT:$<PLATFORM_ID:Windows>>:${CMAKE_DL_LIBS}>
 )
 set_global_variable (HDF5_LIBRARIES_TO_EXPORT ${HDF5_LIB_TARGET})
@@ -955,7 +955,7 @@ if (BUILD_SHARED_LIBS)
   )
   TARGET_C_PROPERTIES (${HDF5_LIBSH_TARGET} SHARED)
   target_link_libraries (${HDF5_LIBSH_TARGET}
-      PRIVATE ${LINK_LIBS} ${LINK_COMP_LIBS} $<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_LIBRARIES}>
+      PRIVATE ${LINK_LIBS} ${LINK_COMP_LIBS} "$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_LIBRARIES}>"
       PUBLIC $<$<NOT:$<PLATFORM_ID:Windows>>:${CMAKE_DL_LIBS}> $<$<BOOL:${HDF5_ENABLE_THREADSAFE}>:Threads::Threads>
   )
   set_global_variable (HDF5_LIBRARIES_TO_EXPORT "${HDF5_LIBRARIES_TO_EXPORT};${HDF5_LIBSH_TARGET}")
diff --git a/testpar/CMakeLists.txt b/testpar/CMakeLists.txt
index e843811..c08a69e 100644
--- a/testpar/CMakeLists.txt
+++ b/testpar/CMakeLists.txt
@@ -26,7 +26,7 @@ target_include_directories(testphdf5
 )
 TARGET_C_PROPERTIES (testphdf5 STATIC)
 target_link_libraries (testphdf5
-    PRIVATE ${HDF5_TEST_LIB_TARGET} ${HDF5_LIB_TARGET} $<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_LIBRARIES}>
+    PRIVATE ${HDF5_TEST_LIB_TARGET} ${HDF5_LIB_TARGET} "$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_LIBRARIES}>"
 )
 set_target_properties (testphdf5 PROPERTIES FOLDER test/par)
 
@@ -37,7 +37,7 @@ MACRO (ADD_H5P_EXE file)
   )
   TARGET_C_PROPERTIES (${file} STATIC)
   target_link_libraries (${file}
-      PRIVATE ${HDF5_TEST_LIB_TARGET} ${HDF5_LIB_TARGET} $<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_LIBRARIES}>
+      PRIVATE ${HDF5_TEST_LIB_TARGET} ${HDF5_LIB_TARGET} "$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_LIBRARIES}>"
   )
   set_target_properties (${file} PROPERTIES FOLDER test/par)
 ENDMACRO (ADD_H5P_EXE file)
diff --git a/tools/lib/CMakeLists.txt b/tools/lib/CMakeLists.txt
index 32166bc..a03b60a 100644
--- a/tools/lib/CMakeLists.txt
+++ b/tools/lib/CMakeLists.txt
@@ -41,7 +41,7 @@ target_include_directories(${HDF5_TOOLS_LIB_TARGET}
 TARGET_C_PROPERTIES (${HDF5_TOOLS_LIB_TARGET} STATIC)
 target_link_libraries (${HDF5_TOOLS_LIB_TARGET}
     PUBLIC ${HDF5_LIB_TARGET}
-    PRIVATE $<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_LIBRARIES}>
+    PRIVATE "$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_LIBRARIES}>"
 )
 set_global_variable (HDF5_LIBRARIES_TO_EXPORT "${HDF5_LIBRARIES_TO_EXPORT};${HDF5_TOOLS_LIB_TARGET}")
 H5_SET_LIB_OPTIONS (${HDF5_TOOLS_LIB_TARGET} ${HDF5_TOOLS_LIB_NAME} STATIC 0)
@@ -61,7 +61,7 @@ if (BUILD_SHARED_LIBS)
   TARGET_C_PROPERTIES (${HDF5_TOOLS_LIBSH_TARGET} SHARED)
   target_link_libraries (${HDF5_TOOLS_LIBSH_TARGET}
       PUBLIC ${HDF5_LIBSH_TARGET}
-      PRIVATE $<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_LIBRARIES}>
+      PRIVATE "$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_LIBRARIES}>"
   )
   set_global_variable (HDF5_LIBRARIES_TO_EXPORT "${HDF5_LIBRARIES_TO_EXPORT};${HDF5_TOOLS_LIBSH_TARGET}")
   H5_SET_LIB_OPTIONS (${HDF5_TOOLS_LIBSH_TARGET} ${HDF5_TOOLS_LIB_NAME} SHARED "TOOLS")
diff --git a/tools/src/h5diff/CMakeLists.txt b/tools/src/h5diff/CMakeLists.txt
index b990e3a..671e6b6 100644
--- a/tools/src/h5diff/CMakeLists.txt
+++ b/tools/src/h5diff/CMakeLists.txt
@@ -37,7 +37,7 @@ if (H5_HAVE_PARALLEL)
   )
   target_include_directories(ph5diff PRIVATE "${HDF5_TOOLS_DIR}/lib;${HDF5_SRC_DIR};${HDF5_BINARY_DIR};$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_INCLUDE_DIRS}>")
   TARGET_C_PROPERTIES (ph5diff STATIC)
-  target_link_libraries (ph5diff PRIVATE ${HDF5_TOOLS_LIB_TARGET} ${HDF5_LIB_TARGET} $<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_LIBRARIES}>)
+  target_link_libraries (ph5diff PRIVATE ${HDF5_TOOLS_LIB_TARGET} ${HDF5_LIB_TARGET} "$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_LIBRARIES}>")
   set_target_properties (ph5diff PROPERTIES FOLDER tools)
   set_global_variable (HDF5_UTILS_TO_EXPORT "${HDF5_UTILS_TO_EXPORT};ph5diff")
 endif ()