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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 ${UPCASE})
CHECK_C_COMPILER_FLAG(${_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 ${UPCASE})
CHECK_C_COMPILER_FLAG(${_FLAG} IS_${UPCASE_PRETTY}_SUPPORTED)
IF(IS_${UPCASE_PRETTY}_SUPPORTED)
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${_FLAG}")
ENDIF()
ENDMACRO()
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