32 lines
992 B
CMake
32 lines
992 B
CMake
# Convenience function that checks the availability of certain
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# C or C++ compiler flags and returns valid ones as a string.
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include(CheckCCompilerFlag)
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include(CheckCXXCompilerFlag)
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function(extract_valid_c_flags varname)
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set(valid_flags)
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foreach(flag IN LISTS ARGN)
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string(REGEX REPLACE "[^a-zA-Z0-9_]+" "_" flag_var ${flag})
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set(flag_var "C_FLAG_${flag_var}")
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check_c_compiler_flag("${flag}" "${flag_var}")
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if(${flag_var})
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set(valid_flags "${valid_flags} ${flag}")
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endif()
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endforeach()
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set(${varname} "${valid_flags}" PARENT_SCOPE)
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endfunction()
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function(extract_valid_cxx_flags varname)
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set(valid_flags)
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foreach(flag IN LISTS ARGN)
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string(REGEX REPLACE "[^a-zA-Z0-9_]+" "_" flag_var ${flag})
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set(flag_var "CXX_FLAG_${flag_var}")
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check_cxx_compiler_flag("${flag}" "${flag_var}")
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if(${flag_var})
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set(valid_flags "${valid_flags} ${flag}")
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endif()
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endforeach()
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set(${varname} "${valid_flags}" PARENT_SCOPE)
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endfunction()
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