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89946bda5e
Broken out from #93429 Somewhat closing the loop opened by 7017e6c9cfd2de. Co-authored-by: Ryan Prichard <rprichard@google.com>
18 lines
713 B
CMake
18 lines
713 B
CMake
include(CMakePushCheckState)
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include(CheckCompilerFlag)
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function(llvm_check_compiler_linker_flag lang flag out_var)
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# If testing a flag with check_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} ${flag}")
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check_compiler_flag("${lang}" "" ${out_var})
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cmake_pop_check_state()
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endfunction()
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