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include(CheckCXXCompilerFlag)
function(check_cxx_compiler_linker_flag flag out_var)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${flag}")
check_cxx_compiler_flag(${flag} ${out_var})
endfunction()
macro(add_compiler_flag policy name flag)
check_cxx_compiler_flag(${flag} "CXX_SUPPORTS_${name}")
if (CXX_SUPPORTS_${name})
add_definitions(${flag})
elseif (NOT (${policy} STREQUAL "OPTIONAL"))
message(FATAL_ERROR "${flag} flag is not supported by ${CMAKE_CXX_COMPILER}")
endif()
endmacro()
macro(add_compiler_linker_flag policy name flag)
check_cxx_compiler_linker_flag(${flag} "CXX_SUPPORTS_${name}")
if (CXX_SUPPORTS_${name})
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}")
elseif (NOT (${policy} STREQUAL "OPTIONAL"))
message(FATAL_ERROR "${flag} flag is not supported by ${CMAKE_CXX_COMPILER}")
endif()
endmacro()
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