18 lines
688 B
CMake
18 lines
688 B
CMake
include(CMakePushCheckState)
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include(CheckCCompilerFlag)
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function(llvm_check_linker_flag flag dest)
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# If testing a flag with check_c_compiler_flag, it gets added to the compile
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# command only, but not to the linker command in that test. If the flag
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# is vital for linking to succeed, the test would fail even if it would
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# have succeeded if it was included on both commands.
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#
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# Therefore, try adding the flag to CMAKE_REQUIRED_FLAGS, which gets
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# added to both compiling and linking commands in the tests.
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cmake_push_check_state()
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set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${flag}")
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check_c_compiler_flag("" ${dest})
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cmake_pop_check_state()
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endfunction()
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