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40 lines
1.2 KiB
CMake
40 lines
1.2 KiB
CMake
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# - 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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if(ARGV1)
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set(VARIANT ${ARGV1})
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string(TOLOWER ${VARIANT} VARIANT)
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set(VARIANT " ${VARIANT}")
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endif()
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message("-- Check compiler${VARIANT} flag ${FLAG}")
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string(TOUPPER ${FLAG} SANITIZED_FLAG)
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string(REGEX REPLACE "[^A-Za-z_0-9]" "_" ${SANITIZED_FLAG} SANITIZED_FLAG)
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check_cxx_compiler_flag(${FLAG} ${SANITIZED_FLAG})
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if(${SANITIZED_FLAG})
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message("-- Check compiler${VARIANT} flag ${FLAG} -- works")
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string(REGEX REPLACE "[^A-Za-z_0-9]" "_" "${VARIANT}" VARIANT)
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string(TOUPPER "${VARIANT}" VARIANT)
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set(CMAKE_CXX_FLAGS${VARIANT} "${CMAKE_CXX_FLAGS}${VARIANT} ${FLAG}" PARENT_SCOPE)
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endif()
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endfunction()
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