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39 lines
1.2 KiB
CMake
39 lines
1.2 KiB
CMake
# - Adds a compiler flag if it is supported by the compiler
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#
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# This function checks that the supplied compiler flag is supported and then
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# adds it to the corresponding compiler flags
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#
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# add_cxx_compiler_flag(<FLAG> [<VARIANT>])
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#
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# - Example
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#
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# include(AddCXXCompilerFlag)
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# add_cxx_compiler_flag(-Wall)
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# add_cxx_compiler_flag(-no-strict-aliasing RELEASE)
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# Requires CMake 2.6+
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if(__add_cxx_compiler_flag)
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return()
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endif()
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set(__add_cxx_compiler_flag INCLUDED)
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include(CheckCXXCompilerFlag)
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function(add_cxx_compiler_flag FLAG)
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string(TOUPPER "HAVE_CXX_FLAG_${FLAG}" SANITIZED_FLAG)
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string(REPLACE "+" "X" SANITIZED_FLAG ${SANITIZED_FLAG})
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string(REGEX REPLACE "[^A-Za-z_0-9]" "_" SANITIZED_FLAG ${SANITIZED_FLAG})
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string(REGEX REPLACE "_+" "_" SANITIZED_FLAG ${SANITIZED_FLAG})
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set(CMAKE_REQUIRED_FLAGS "${FLAG}")
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check_cxx_compiler_flag("" ${SANITIZED_FLAG})
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if(${SANITIZED_FLAG})
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set(VARIANT ${ARGV1})
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if(ARGV1)
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string(REGEX REPLACE "[^A-Za-z_0-9]" "_" VARIANT "${VARIANT}")
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string(TOUPPER "_${VARIANT}" VARIANT)
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endif()
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set(CMAKE_CXX_FLAGS${VARIANT} "${CMAKE_CXX_FLAGS${VARIANT}} ${FLAG}" PARENT_SCOPE)
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endif()
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endfunction()
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