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since GCC-9 > Using the types and functions in <filesystem> does not require linking > with -lstdc++fs now. see https://gcc.gnu.org/gcc-9/changes.html#libstdcxx Signed-off-by: Kefu Chai <kchai@redhat.com>
58 lines
1.7 KiB
CMake
58 lines
1.7 KiB
CMake
set(_std_filesystem_test_src
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${CMAKE_CURRENT_LIST_DIR}/FindStdFilesystem_test.cc)
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macro(try_std_filesystem_library _library _result _already_included)
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set(_std_filesystem_try_compile_arg
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CXX_STANDARD 17)
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if(NOT _library STREQUAL "")
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list(APPEND _std_filesystem_try_compile_arg
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LINK_LIBRARIES ${_library})
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endif()
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try_compile(_std_filesystem_compiles
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${CMAKE_CURRENT_BINARY_DIR}
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SOURCES ${_std_filesystem_test_src}
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${_std_filesystem_try_compile_arg})
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unset(_std_filesystem_try_compile_arg)
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if(_std_filesystem_compiles)
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if(NOT _library STREQUAL "")
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set(${_result} ${_library})
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else()
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set(${_already_included} "included by standard library")
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endif()
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endif()
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unset(_std_filesystem_compiles)
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endmacro()
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set(_std_filesystem_required_var "StdFilesystem_LIBRARY")
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set(_std_filesystem_already_included FALSE)
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foreach(library
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""
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"stdc++fs"
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"c++experimental"
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"c++fs")
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try_std_filesystem_library("${library}" StdFilesystem_LIBRARY _std_filesystem_already_included)
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if(_std_filesystem_already_included)
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set(_std_filesystem_required_var "_std_filesystem_already_included")
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break()
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elseif(StdFilesystem_LIBRARY)
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break()
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endif()
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endforeach()
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unset(_std_filesystem_test_src)
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(StdFilesystem
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FOUND_VAR StdFilesystem_FOUND
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REQUIRED_VARS ${_std_filesystem_required_var})
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mark_as_advanced(StdFilesystem_LIBRARY)
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if(StdFilesystem_FOUND AND NOT (TARGET StdFilesystem::filesystem))
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add_library(StdFilesystem::filesystem INTERFACE IMPORTED)
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if(StdFilesystem_LIBRARY)
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set_target_properties(StdFilesystem::filesystem PROPERTIES
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INTERFACE_LINK_LIBRARIES ${StdFilesystem_LIBRARY})
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endif()
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endif()
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