Modules: Use new SOURCES_FROM_* try_compile (2/2)

Modify some additional modules that ship with CMake to use the new
SOURCES_FROM_* arguments to try_compile / try_run as added by commits
cb14ae2b87 (try_compile: Add SOURCE_FROM_{ARG,VAR}, 2022-09-21) and
611d801790 (try_compile: Add SOURCE_FROM_FILE, 2022-09-22). This covers
modules that need to read and alter a template source file, which were
not addressed in the previous commit.

Note that FindOpenACC.cmake does not actually need configure_file
functionality; it appears to have inherited the (gratuitous) use thereof
from FindOpenMP.cmake, with which its code bears significant similarity.

9 files changed, 74 insertions, 79 deletions

diff --git a/Modules/CheckIncludeFile.cmake b/Modules/CheckIncludeFile.cmake
index 2253fab..4cba91b 100644
--- a/Modules/CheckIncludeFile.cmake
+++ b/Modules/CheckIncludeFile.cmake
@@ -54,8 +54,8 @@ macro(CHECK_INCLUDE_FILE INCLUDE VARIABLE)
     endif()
     set(MACRO_CHECK_INCLUDE_FILE_FLAGS ${CMAKE_REQUIRED_FLAGS})
     set(CHECK_INCLUDE_FILE_VAR ${INCLUDE})
-    configure_file(${CMAKE_ROOT}/Modules/CheckIncludeFile.c.in
-      ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckIncludeFile.c)
+    file(READ ${CMAKE_ROOT}/Modules/CheckIncludeFile.c.in _CIF_SOURCE_CONTENT)
+    string(CONFIGURE "${_CIF_SOURCE_CONTENT}" _CIF_SOURCE_CONTENT)
     if(NOT CMAKE_REQUIRED_QUIET)
       message(CHECK_START "Looking for ${INCLUDE}")
     endif()
@@ -93,7 +93,7 @@ macro(CHECK_INCLUDE_FILE INCLUDE VARIABLE)
     endif()
 
     try_compile(${VARIABLE}
-      SOURCES ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckIncludeFile.c
+      SOURCE_FROM_VAR CheckIncludeFile.c _CIF_SOURCE_CONTENT
       COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
       ${_CIF_LINK_OPTIONS}
       ${_CIF_LINK_LIBRARIES}
diff --git a/Modules/CheckIncludeFileCXX.cmake b/Modules/CheckIncludeFileCXX.cmake
index 453751e..f6af036 100644
--- a/Modules/CheckIncludeFileCXX.cmake
+++ b/Modules/CheckIncludeFileCXX.cmake
@@ -53,8 +53,8 @@ macro(CHECK_INCLUDE_FILE_CXX INCLUDE VARIABLE)
     endif()
     set(MACRO_CHECK_INCLUDE_FILE_FLAGS ${CMAKE_REQUIRED_FLAGS})
     set(CHECK_INCLUDE_FILE_VAR ${INCLUDE})
-    configure_file(${CMAKE_ROOT}/Modules/CheckIncludeFile.cxx.in
-      ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckIncludeFile.cxx)
+    file(READ ${CMAKE_ROOT}/Modules/CheckIncludeFile.cxx.in _CIF_SOURCE_CONTENT)
+    string(CONFIGURE "${_CIF_SOURCE_CONTENT}" _CIF_SOURCE_CONTENT)
     if(NOT CMAKE_REQUIRED_QUIET)
       message(CHECK_START "Looking for C++ include ${INCLUDE}")
     endif()
@@ -92,7 +92,7 @@ macro(CHECK_INCLUDE_FILE_CXX INCLUDE VARIABLE)
     endif()
 
     try_compile(${VARIABLE}
-      SOURCES ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckIncludeFile.cxx
+      SOURCE_FROM_VAR CheckIncludeFile.cxx _CIF_SOURCE_CONTENT
       COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
       ${_CIF_LINK_OPTIONS}
       ${_CIF_LINK_LIBRARIES}
diff --git a/Modules/CheckPrototypeDefinition.cmake b/Modules/CheckPrototypeDefinition.cmake
index 5a07502..12f4e86 100644
--- a/Modules/CheckPrototypeDefinition.cmake
+++ b/Modules/CheckPrototypeDefinition.cmake
@@ -94,13 +94,11 @@ function(check_prototype_definition _FUNCTION _PROTOTYPE _RETURN _HEADER _VARIAB
     set(CHECK_PROTOTYPE_DEFINITION_PROTO ${_PROTOTYPE})
     set(CHECK_PROTOTYPE_DEFINITION_RETURN ${_RETURN})
 
-    configure_file("${__check_proto_def_dir}/CheckPrototypeDefinition.c.in"
-      "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c" @ONLY)
-
-    file(READ ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c _SOURCE)
+    file(READ ${__check_proto_def_dir}/CheckPrototypeDefinition.c.in _SOURCE)
+    string(CONFIGURE "${_SOURCE}" _SOURCE @ONLY)
 
     try_compile(${_VARIABLE}
-      SOURCES ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c
+      SOURCE_FROM_VAR CheckPrototypeDefinition.c _SOURCE
       COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
       ${CHECK_PROTOTYPE_DEFINITION_LINK_OPTIONS}
       ${CHECK_PROTOTYPE_DEFINITION_LIBS}
diff --git a/Modules/CheckTypeSize.cmake b/Modules/CheckTypeSize.cmake
index 4cffa1a..b14ab06 100644
--- a/Modules/CheckTypeSize.cmake
+++ b/Modules/CheckTypeSize.cmake
@@ -104,9 +104,9 @@ function(__check_type_size_impl type var map builtin language)
 
   # Perform language check
   if(language STREQUAL "C")
-    set(src ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CheckTypeSize/${var}.c)
+    set(src ${var}.c)
   elseif(language STREQUAL "CXX")
-    set(src ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CheckTypeSize/${var}.cpp)
+    set(src ${var}.cpp)
   else()
     message(FATAL_ERROR "Unknown language:\n  ${language}\nSupported languages: C, CXX.\n")
   endif()
@@ -142,8 +142,9 @@ function(__check_type_size_impl type var map builtin language)
 
   # Perform the check.
   set(bin ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CheckTypeSize/${var}.bin)
-  configure_file(${__check_type_size_dir}/CheckTypeSize.c.in ${src} @ONLY)
-  try_compile(HAVE_${var} SOURCES ${src}
+  file(READ ${__check_type_size_dir}/CheckTypeSize.c.in src_content)
+  string(CONFIGURE "${src_content}" src_content @ONLY)
+  try_compile(HAVE_${var} SOURCE_FROM_VAR "${src}" src_content
     COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
     LINK_OPTIONS ${CMAKE_REQUIRED_LINK_OPTIONS}
     LINK_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES}
@@ -209,9 +210,8 @@ function(__check_type_size_impl type var map builtin language)
     if(NOT CMAKE_REQUIRED_QUIET)
       message(CHECK_FAIL "failed")
     endif()
-    file(READ ${src} content)
     file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
-      "Determining size of ${type} failed with the following output:\n${output}\n${src}:\n${content}\n\n")
+      "Determining size of ${type} failed with the following output:\n${output}\n${src}:\n${src_content}\n\n")
     set(${var} "" CACHE INTERNAL "CHECK_TYPE_SIZE: ${type} unknown")
     file(REMOVE ${map})
   endif()
diff --git a/Modules/FindMFC.cmake b/Modules/FindMFC.cmake
index 0574ab5..2d5de89 100644
--- a/Modules/FindMFC.cmake
+++ b/Modules/FindMFC.cmake
@@ -29,21 +29,19 @@ endif()
 if(MFC_ATTEMPT_TRY_COMPILE)
   if(NOT DEFINED MFC_HAVE_MFC)
     set(CHECK_INCLUDE_FILE_VAR "afxwin.h")
-    configure_file(${CMAKE_ROOT}/Modules/CheckIncludeFile.cxx.in
-      ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckIncludeFile.cxx)
+    file(READ ${CMAKE_ROOT}/Modules/CheckIncludeFile.cxx.in _CIF_SOURCE_CONTENT)
+    string(CONFIGURE "${_CIF_SOURCE_CONTENT}" _CIF_SOURCE_CONTENT)
     message(CHECK_START "Looking for MFC")
     # Try both shared and static as the root project may have set the /MT flag
     try_compile(MFC_HAVE_MFC
-      SOURCES ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckIncludeFile.cxx
+      SOURCE_FROM_VAR CheckIncludeFile.cxx _CIF_SOURCE_CONTENT
       CMAKE_FLAGS
       -DCMAKE_MFC_FLAG:STRING=2
       -DCOMPILE_DEFINITIONS:STRING=-D_AFXDLL
       OUTPUT_VARIABLE OUTPUT)
     if(NOT MFC_HAVE_MFC)
-      configure_file(${CMAKE_ROOT}/Modules/CheckIncludeFile.cxx.in
-        ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckIncludeFile.cxx)
       try_compile(MFC_HAVE_MFC
-        SOURCES ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckIncludeFile.cxx
+        SOURCE_FROM_VAR CheckIncludeFile.cxx _CIF_SOURCE_CONTENT
         CMAKE_FLAGS
         -DCMAKE_MFC_FLAG:STRING=1
         OUTPUT_VARIABLE OUTPUT)
diff --git a/Modules/FindMPI.cmake b/Modules/FindMPI.cmake
index 2faab0e..e15be91 100644
--- a/Modules/FindMPI.cmake
+++ b/Modules/FindMPI.cmake
@@ -1246,20 +1246,22 @@ function(_MPI_try_staged_settings LANG MPI_TEST_FILE_NAME MODE RUN_BINARY SUPPRE
     else() # F77 header
       set(MPI_Fortran_INCLUDE_LINE "implicit none\n      include 'mpif.h'")
     endif()
-    configure_file("${SRC_DIR}/${MPI_TEST_FILE_NAME}.f90.in" "${WORK_DIR}/${MPI_TEST_FILE_NAME}.f90" @ONLY)
-    set(MPI_TEST_SOURCE_FILE "${WORK_DIR}/${MPI_TEST_FILE_NAME}.f90")
+    file(READ "${SRC_DIR}/${MPI_TEST_FILE_NAME}.f90.in" MPI_TEST_SOURCE_CONTENT)
+    string(CONFIGURE "${MPI_TEST_SOURCE_CONTENT}" MPI_TEST_SOURCE_CONTENT)
+    set(MPI_TEST_SOURCE_FILE "${MPI_TEST_FILE_NAME}.f90")
   elseif(LANG STREQUAL "CXX")
-    configure_file("${SRC_DIR}/${MPI_TEST_FILE_NAME}.c" "${WORK_DIR}/${MPI_TEST_FILE_NAME}.cpp" COPYONLY)
-    set(MPI_TEST_SOURCE_FILE "${WORK_DIR}/${MPI_TEST_FILE_NAME}.cpp")
+    file(READ "${SRC_DIR}/${MPI_TEST_FILE_NAME}.c" MPI_TEST_SOURCE_CONTENT)
+    set(MPI_TEST_SOURCE_FILE "${MPI_TEST_FILE_NAME}.cpp")
     if(MODE STREQUAL "TEST_MPICXX")
       set(MPI_TEST_COMPILE_DEFINITIONS TEST_MPI_MPICXX)
     endif()
   else() # C
-    set(MPI_TEST_SOURCE_FILE "${SRC_DIR}/${MPI_TEST_FILE_NAME}.c")
+    file(READ "${SRC_DIR}/${MPI_TEST_FILE_NAME}.c" MPI_TEST_SOURCE_CONTENT)
+    set(MPI_TEST_SOURCE_FILE "${MPI_TEST_FILE_NAME}.c")
   endif()
   if(RUN_BINARY)
     try_run(MPI_RUN_RESULT_${LANG}_${MPI_TEST_FILE_NAME}_${MODE} MPI_RESULT_${LANG}_${MPI_TEST_FILE_NAME}_${MODE}
-      SOURCES "${MPI_TEST_SOURCE_FILE}"
+      SOURCE_FROM_VAR "${MPI_TEST_SOURCE_FILE}" MPI_TEST_SOURCE_CONTENT
       COMPILE_DEFINITIONS ${MPI_TEST_COMPILE_DEFINITIONS}
       LINK_LIBRARIES MPI::MPI_${LANG}
       RUN_OUTPUT_VARIABLE MPI_RUN_OUTPUT_${LANG}_${MPI_TEST_FILE_NAME}_${MODE}
@@ -1267,7 +1269,7 @@ function(_MPI_try_staged_settings LANG MPI_TEST_FILE_NAME MODE RUN_BINARY SUPPRE
     set(MPI_RUN_OUTPUT_${LANG}_${MPI_TEST_FILE_NAME}_${MODE} "${MPI_RUN_OUTPUT_${LANG}_${MPI_TEST_FILE_NAME}_${MODE}}" PARENT_SCOPE)
   else()
     try_compile(MPI_RESULT_${LANG}_${MPI_TEST_FILE_NAME}_${MODE}
-      SOURCES "${MPI_TEST_SOURCE_FILE}"
+      SOURCE_FROM_VAR "${MPI_TEST_SOURCE_FILE}" MPI_TEST_SOURCE_CONTENT
       COMPILE_DEFINITIONS ${MPI_TEST_COMPILE_DEFINITIONS}
       LINK_LIBRARIES MPI::MPI_${LANG}
       COPY_FILE "${BIN_FILE}"
diff --git a/Modules/FindOpenACC.cmake b/Modules/FindOpenACC.cmake
index e05d0c6..00e42b8 100644
--- a/Modules/FindOpenACC.cmake
+++ b/Modules/FindOpenACC.cmake
@@ -128,21 +128,18 @@ set(OpenACC_Fortran_CHECK_VERSION_SOURCE
 )
 
 
-function(_OPENACC_WRITE_SOURCE_FILE LANG SRC_FILE_CONTENT_VAR SRC_FILE_NAME SRC_FILE_FULLPATH)
-  set(WORK_DIR ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/FindOpenACC)
+macro(_OPENACC_PREPARE_SOURCE LANG CONTENT_ID NAME_PREFIX FULLNAME_VAR CONTENT_VAR)
   if("${LANG}" STREQUAL "C")
-    set(SRC_FILE "${WORK_DIR}/${SRC_FILE_NAME}.c")
-    file(WRITE "${SRC_FILE}" "${OpenACC_C_CXX_${SRC_FILE_CONTENT_VAR}}")
+    set(${FULLNAME_VAR} "${NAME_PREFIX}.c")
+    set(${CONTENT_VAR} "${OpenACC_C_CXX_${CONTENT_ID}}")
   elseif("${LANG}" STREQUAL "CXX")
-    set(SRC_FILE "${WORK_DIR}/${SRC_FILE_NAME}.cpp")
-    file(WRITE "${SRC_FILE}" "${OpenACC_C_CXX_${SRC_FILE_CONTENT_VAR}}")
+    set(${FULLNAME_VAR} "${NAME_PREFIX}.cpp")
+    set(${CONTENT_VAR} "${OpenACC_C_CXX_${CONTENT_ID}}")
   elseif("${LANG}" STREQUAL "Fortran")
-    set(SRC_FILE "${WORK_DIR}/${SRC_FILE_NAME}.F90")
-    file(WRITE "${SRC_FILE}_in" "${OpenACC_Fortran_${SRC_FILE_CONTENT_VAR}}")
-    configure_file("${SRC_FILE}_in" "${SRC_FILE}" @ONLY)
+    set(${FULLNAME_VAR} "${NAME_PREFIX}.F90")
+    set(${CONTENT_VAR} "${OpenACC_Fortran_${CONTENT_ID}}")
   endif()
-  set(${SRC_FILE_FULLPATH} "${SRC_FILE}" PARENT_SCOPE)
-endfunction()
+endmacro()
 
 
 function(_OPENACC_GET_FLAGS_CANDIDATE LANG FLAG_VAR)
@@ -184,10 +181,12 @@ endfunction()
 function(_OPENACC_GET_FLAGS LANG FLAG_VAR)
   set(FLAG_CANDIDATES "")
   _OPENACC_GET_FLAGS_CANDIDATE("${LANG}" FLAG_CANDIDATES)
-  _OPENACC_WRITE_SOURCE_FILE("${LANG}" "TEST_SOURCE" OpenACCTryFlag _OPENACC_TEST_SRC)
+  _OPENACC_PREPARE_SOURCE("${LANG}" TEST_SOURCE OpenACCTryFlag
+    _OPENACC_TEST_SRC_NAME _OPENACC_TEST_SRC_CONTENT)
 
   foreach(FLAG IN LISTS FLAG_CANDIDATES)
-    try_compile(OpenACC_FLAG_TEST_RESULT SOURCES ${_OPENACC_TEST_SRC}
+    try_compile(OpenACC_FLAG_TEST_RESULT
+      SOURCE_FROM_VAR "${_OPENACC_TEST_SRC_NAME}" _OPENACC_TEST_SRC_CONTENT
       CMAKE_FLAGS "-DCOMPILE_DEFINITIONS:STRING=${FLAG}"
       OUTPUT_VARIABLE OpenACC_TRY_COMPILE_OUTPUT
     )
@@ -212,13 +211,15 @@ endfunction()
 
 
 function(_OPENACC_GET_SPEC_DATE LANG SPEC_DATE)
-  _OPENACC_WRITE_SOURCE_FILE("${LANG}" "CHECK_VERSION_SOURCE" OpenACCCheckVersion _OPENACC_TEST_SRC)
+  _OPENACC_PREPARE_SOURCE(${LANG} CHECK_VERSION_SOURCE OpenACCCheckVersion
+    _OPENACC_TEST_SRC_NAME _OPENACC_TEST_SRC_CONTENT)
 
   set(BIN_FILE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/FindOpenACC/accver_${LANG}.bin")
-  try_compile(OpenACC_SPECTEST_${LANG} SOURCES "${_OPENACC_TEST_SRC}"
-              CMAKE_FLAGS "-DCOMPILE_DEFINITIONS:STRING=${OpenACC_${LANG}_FLAGS}"
-              COPY_FILE ${BIN_FILE}
-              OUTPUT_VARIABLE OUTPUT)
+  try_compile(OpenACC_SPECTEST_${LANG}
+    SOURCE_FROM_VAR "${_OPENACC_TEST_SRC_NAME}" _OPENACC_TEST_SRC_CONTENT
+    CMAKE_FLAGS "-DCOMPILE_DEFINITIONS:STRING=${OpenACC_${LANG}_FLAGS}"
+    COPY_FILE "${BIN_FILE}"
+    OUTPUT_VARIABLE OUTPUT)
 
   if(${OpenACC_SPECTEST_${LANG}})
     file(STRINGS ${BIN_FILE} specstr LIMIT_COUNT 1 REGEX "INFO:OpenACC-date")
diff --git a/Modules/FindOpenMP.cmake b/Modules/FindOpenMP.cmake
index 040cbe9..9e24925 100644
--- a/Modules/FindOpenMP.cmake
+++ b/Modules/FindOpenMP.cmake
@@ -178,27 +178,25 @@ set(OpenMP_Fortran_TEST_SOURCE
   "
 )
 
-function(_OPENMP_WRITE_SOURCE_FILE LANG SRC_FILE_CONTENT_VAR SRC_FILE_NAME SRC_FILE_FULLPATH)
-  set(WORK_DIR ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/FindOpenMP)
+macro(_OPENMP_PREPARE_SOURCE LANG CONTENT_ID NAME_PREFIX FULLNAME_VAR CONTENT_VAR)
   if("${LANG}" STREQUAL "C")
-    set(SRC_FILE "${WORK_DIR}/${SRC_FILE_NAME}.c")
-    file(WRITE "${SRC_FILE}" "${OpenMP_C_CXX_${SRC_FILE_CONTENT_VAR}}")
+    set(${FULLNAME_VAR} "${NAME_PREFIX}.c")
+    set(${CONTENT_VAR} "${OpenMP_C_CXX_${CONTENT_ID}}")
   elseif("${LANG}" STREQUAL "CXX")
-    set(SRC_FILE "${WORK_DIR}/${SRC_FILE_NAME}.cpp")
-    file(WRITE "${SRC_FILE}" "${OpenMP_C_CXX_${SRC_FILE_CONTENT_VAR}}")
+    set(${FULLNAME_VAR} "${NAME_PREFIX}.cpp")
+    set(${CONTENT_VAR} "${OpenMP_C_CXX_${CONTENT_ID}}")
   elseif("${LANG}" STREQUAL "Fortran")
-    set(SRC_FILE "${WORK_DIR}/${SRC_FILE_NAME}.f90")
-    file(WRITE "${SRC_FILE}_in" "${OpenMP_Fortran_${SRC_FILE_CONTENT_VAR}}")
-    configure_file("${SRC_FILE}_in" "${SRC_FILE}" @ONLY)
+    set(${FULLNAME_VAR} "${NAME_PREFIX}.F90")
+    string(CONFIGURE "${OpenMP_Fortran_${CONTENT_ID}}" ${CONTENT_VAR} @ONLY)
   endif()
-  set(${SRC_FILE_FULLPATH} "${SRC_FILE}" PARENT_SCOPE)
-endfunction()
+endmacro()
 
 include(${CMAKE_CURRENT_LIST_DIR}/CMakeParseImplicitLinkInfo.cmake)
 
 function(_OPENMP_GET_FLAGS LANG FLAG_MODE OPENMP_FLAG_VAR OPENMP_LIB_NAMES_VAR)
   _OPENMP_FLAG_CANDIDATES("${LANG}")
-  _OPENMP_WRITE_SOURCE_FILE("${LANG}" "TEST_SOURCE" OpenMPTryFlag _OPENMP_TEST_SRC)
+  _OPENMP_PREPARE_SOURCE("${LANG}" TEST_SOURCE OpenMPTryFlag
+    _OPENMP_TEST_SRC_NAME _OPENMP_TEST_SRC_CONTENT)
 
   unset(OpenMP_VERBOSE_COMPILE_OPTIONS)
   separate_arguments(OpenMP_VERBOSE_OPTIONS NATIVE_COMMAND "${CMAKE_${LANG}_VERBOSE_FLAG}")
@@ -215,7 +213,7 @@ function(_OPENMP_GET_FLAGS LANG FLAG_MODE OPENMP_FLAG_VAR OPENMP_LIB_NAMES_VAR)
     endif()
     string(REGEX REPLACE "[-/=+]" "" OPENMP_PLAIN_FLAG "${OPENMP_FLAG}")
     try_compile( OpenMP_COMPILE_RESULT_${FLAG_MODE}_${OPENMP_PLAIN_FLAG}
-      SOURCES ${_OPENMP_TEST_SRC}
+      SOURCE_FROM_VAR "${_OPENMP_TEST_SRC_NAME}" _OPENMP_TEST_SRC_CONTENT
       CMAKE_FLAGS "-DCOMPILE_DEFINITIONS:STRING=${OPENMP_FLAGS_TEST}"
       LINK_LIBRARIES ${CMAKE_${LANG}_VERBOSE_FLAG}
       OUTPUT_VARIABLE OpenMP_TRY_COMPILE_OUTPUT
@@ -313,7 +311,7 @@ function(_OPENMP_GET_FLAGS LANG FLAG_MODE OPENMP_FLAG_VAR OPENMP_LIB_NAMES_VAR)
         # explicitly add a search path if the header can't be found on the
         # default header search path already.
         try_compile( OpenMP_COMPILE_RESULT_${FLAG_MODE}_${OPENMP_PLAIN_FLAG}
-          SOURCES ${_OPENMP_TEST_SRC}
+          SOURCE_FROM_VAR "${_OPENMP_TEST_SRC_NAME}" _OPENMP_TEST_SRC_CONTENT
           CMAKE_FLAGS "-DCOMPILE_DEFINITIONS:STRING=${OPENMP_FLAGS_TEST}"
           LINK_LIBRARIES ${CMAKE_${LANG}_VERBOSE_FLAG} ${OpenMP_libomp_LIBRARY}
           OUTPUT_VARIABLE OpenMP_TRY_COMPILE_OUTPUT
@@ -324,7 +322,7 @@ function(_OPENMP_GET_FLAGS LANG FLAG_MODE OPENMP_FLAG_VAR OPENMP_LIB_NAMES_VAR)
           set(OpenMP_${LANG}_INCLUDE_DIR "${OpenMP_${LANG}_INCLUDE_DIR}" PARENT_SCOPE)
           if(OpenMP_${LANG}_INCLUDE_DIR)
             try_compile( OpenMP_COMPILE_RESULT_${FLAG_MODE}_${OPENMP_PLAIN_FLAG}
-              SOURCES ${_OPENMP_TEST_SRC}
+              SOURCE_FROM_VAR "${_OPENMP_TEST_SRC_NAME}" _OPENMP_TEST_SRC_CONTENT
               CMAKE_FLAGS "-DCOMPILE_DEFINITIONS:STRING=${OPENMP_FLAGS_TEST}"
                           "-DINCLUDE_DIRECTORIES:STRING=${OpenMP_${LANG}_INCLUDE_DIR}"
               LINK_LIBRARIES ${CMAKE_${LANG}_VERBOSE_FLAG} ${OpenMP_libomp_LIBRARY}
@@ -347,7 +345,7 @@ function(_OPENMP_GET_FLAGS LANG FLAG_MODE OPENMP_FLAG_VAR OPENMP_LIB_NAMES_VAR)
       mark_as_advanced(OpenMP_libomp_LIBRARY)
       if(OpenMP_libomp_LIBRARY)
         try_compile( OpenMP_COMPILE_RESULT_${FLAG_MODE}_${OPENMP_PLAIN_FLAG}
-          SOURCES ${_OPENMP_TEST_SRC}
+          SOURCE_FROM_VAR "${_OPENMP_TEST_SRC_NAME}" _OPENMP_TEST_SRC_CONTENT
           CMAKE_FLAGS "-DCOMPILE_DEFINITIONS:STRING=${OPENMP_FLAGS_TEST}"
           LINK_LIBRARIES ${CMAKE_${LANG}_VERBOSE_FLAG} ${OpenMP_libomp_LIBRARY}
           OUTPUT_VARIABLE OpenMP_TRY_COMPILE_OUTPUT
@@ -409,7 +407,8 @@ set(OpenMP_Fortran_CHECK_VERSION_SOURCE
 ")
 
 function(_OPENMP_GET_SPEC_DATE LANG SPEC_DATE)
-  _OPENMP_WRITE_SOURCE_FILE("${LANG}" "CHECK_VERSION_SOURCE" OpenMPCheckVersion _OPENMP_TEST_SRC)
+  _OPENMP_PREPARE_SOURCE("${LANG}" CHECK_VERSION_SOURCE OpenMPCheckVersion
+    _OPENMP_TEST_SRC_NAME _OPENMP_TEST_SRC_CONTENT)
 
   unset(_includeDirFlags)
   if(OpenMP_${LANG}_INCLUDE_DIR)
@@ -419,10 +418,10 @@ function(_OPENMP_GET_SPEC_DATE LANG SPEC_DATE)
   set(BIN_FILE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/FindOpenMP/ompver_${LANG}.bin")
   string(REGEX REPLACE "[-/=+]" "" OPENMP_PLAIN_FLAG "${OPENMP_FLAG}")
   try_compile(OpenMP_SPECTEST_${LANG}_${OPENMP_PLAIN_FLAG}
-              SOURCES "${_OPENMP_TEST_SRC}"
-              CMAKE_FLAGS "-DCOMPILE_DEFINITIONS:STRING=${OpenMP_${LANG}_FLAGS}" ${_includeDirFlags}
-              COPY_FILE ${BIN_FILE}
-              OUTPUT_VARIABLE OpenMP_TRY_COMPILE_OUTPUT)
+    SOURCE_FROM_VAR "${_OPENMP_TEST_SRC_NAME}" _OPENMP_TEST_SRC_CONTENT
+    CMAKE_FLAGS "-DCOMPILE_DEFINITIONS:STRING=${OpenMP_${LANG}_FLAGS}" ${_includeDirFlags}
+    COPY_FILE "${BIN_FILE}"
+    OUTPUT_VARIABLE OpenMP_TRY_COMPILE_OUTPUT)
 
   if(${OpenMP_SPECTEST_${LANG}_${OPENMP_PLAIN_FLAG}})
     file(STRINGS ${BIN_FILE} specstr LIMIT_COUNT 1 REGEX "INFO:OpenMP-date")
diff --git a/Modules/TestBigEndian.cmake b/Modules/TestBigEndian.cmake
index e738d32..096c90c 100644
--- a/Modules/TestBigEndian.cmake
+++ b/Modules/TestBigEndian.cmake
@@ -77,19 +77,16 @@ macro(__TEST_BIG_ENDIAN_LEGACY_IMPL VARIABLE)
     endif()
 
     if(_test_language STREQUAL "CXX")
-      set(_test_file "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/TestEndianess.cpp")
+      set(_test_file TestEndianess.cpp)
     else()
-      set(_test_file "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/TestEndianess.c")
+      set(_test_file TestEndianess.c)
     endif()
 
-    configure_file("${CMAKE_ROOT}/Modules/TestEndianess.c.in"
-                   ${_test_file}
-                   @ONLY)
-
-     file(READ ${_test_file} TEST_ENDIANESS_FILE_CONTENT)
+    file(READ "${CMAKE_ROOT}/Modules/TestEndianess.c.in" TEST_ENDIANESS_FILE_CONTENT)
+    string(CONFIGURE "${TEST_ENDIANESS_FILE_CONTENT}" TEST_ENDIANESS_FILE_CONTENT @ONLY)
 
      try_compile(HAVE_${VARIABLE}
-      SOURCES ${_test_file}
+      SOURCE_FROM_VAR "${_test_file}" TEST_ENDIANESS_FILE_CONTENT
       OUTPUT_VARIABLE OUTPUT
       COPY_FILE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestEndianess.bin" )
 
@@ -130,12 +127,12 @@ macro(__TEST_BIG_ENDIAN_LEGACY_IMPL VARIABLE)
         endif()
 
         file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
-          "Determining if the system is big endian passed with the following output:\n${OUTPUT}\nTestEndianess.c:\n${TEST_ENDIANESS_FILE_CONTENT}\n\n")
+          "Determining if the system is big endian passed with the following output:\n${OUTPUT}\n${_test_file}:\n${TEST_ENDIANESS_FILE_CONTENT}\n\n")
 
       else()
         message(CHECK_FAIL "failed")
         file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
-          "Determining if the system is big endian failed with the following output:\n${OUTPUT}\nTestEndianess.c:\n${TEST_ENDIANESS_FILE_CONTENT}\n\n")
+          "Determining if the system is big endian failed with the following output:\n${OUTPUT}\n${_test_file}:\n${TEST_ENDIANESS_FILE_CONTENT}\n\n")
         set(${VARIABLE})
       endif()
   endif()