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# - Append compiler flag to CMAKE_C_FLAGS if compiler supports it
# ADD_C_FLAG_IF_SUPPORTED(<flag>)
# <flag> - the compiler flag to test
# This internally calls the CHECK_C_COMPILER_FLAG macro.
include(CheckCCompilerFlag)
macro(ADD_C_FLAG _FLAG)
string(TOUPPER ${_FLAG} UPCASE)
string(REGEX REPLACE "[-=]" "_" UPCASE_PRETTY ${UPCASE})
string(REGEX REPLACE "^_+" "" UPCASE_PRETTY ${UPCASE_PRETTY})
check_c_compiler_flag(${_FLAG} IS_${UPCASE_PRETTY}_SUPPORTED)
if(IS_${UPCASE_PRETTY}_SUPPORTED)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${_FLAG}")
else()
message(FATAL_ERROR "Required flag ${_FLAG} is not supported")
endif()
endmacro()
macro(ADD_C_FLAG_IF_SUPPORTED _FLAG)
string(TOUPPER ${_FLAG} UPCASE)
string(REGEX REPLACE "[-=]" "_" UPCASE_PRETTY ${UPCASE})
string(REGEX REPLACE "^_+" "" UPCASE_PRETTY ${UPCASE_PRETTY})
check_c_compiler_flag(${_FLAG} IS_${UPCASE_PRETTY}_SUPPORTED)
if(IS_${UPCASE_PRETTY}_SUPPORTED)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${_FLAG}")
endif()
endmacro()
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