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set(CMake_CXX17_BROKEN 0)
if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang|PGI|Intel")
if(NOT CMAKE_CXX17_STANDARD_COMPILE_OPTION)
set(CMake_CXX17_WORKS 0)
endif()
if(NOT DEFINED CMake_CXX17_WORKS)
include(${CMAKE_CURRENT_LIST_DIR}/cm_message_checks_compat.cmake)
cm_message_checks_compat(
"Checking if compiler supports needed C++17 constructs"
__checkStart __checkPass __checkFail)
message(${__checkStart})
try_compile(CMake_CXX17_WORKS
${CMAKE_CURRENT_BINARY_DIR}
${CMAKE_CURRENT_LIST_DIR}/cm_cxx17_check.cpp
CMAKE_FLAGS -DCMAKE_CXX_STANDARD=17
OUTPUT_VARIABLE OUTPUT
)
if(CMake_CXX17_WORKS AND "${OUTPUT}" MATCHES "error: no member named.*gets.*in the global namespace")
set_property(CACHE CMake_CXX17_WORKS PROPERTY VALUE 0)
endif()
if(CMake_CXX17_WORKS)
message(${__checkPass} "yes")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"Determining if compiler supports needed C++17 constructs passed with the following output:\n"
"${OUTPUT}\n"
"\n"
)
else()
message(${__checkFail} "no")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
"Determining if compiler supports needed C++17 constructs failed with the following output:\n"
"${OUTPUT}\n"
"\n"
)
endif()
endif()
if(NOT CMake_CXX17_WORKS)
set(CMake_CXX17_BROKEN 1)
endif()
endif()
|
