CMake/Modules/TestCXXAcceptsFlag.cmake

#
# Check if the CXX compiler accepts a flag
#
# CHECK_FUNCTION_EXISTS - macro which checks if the function exists
# FLAG - the flags to try
# VARIABLE - variable to store the result
#

MACRO(CHECK_CXX_ACCEPTS_FLAG FLAGS  VARIABLE)
   MESSAGE(STATUS "Checking to see if CXX compiler acepts flag ${FLAGS}")
   TRY_COMPILE(${VARIABLE}
               ${CMAKE_BINARY_DIR}
               ${CMAKE_ROOT}/Modules/DummyCXXFile.cxx
               CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${FLAGS}
               OUTPUT_VARIABLE OUTPUT) 
   IF(${VARIABLE})
     MESSAGE(STATUS "Checking to see if CXX compiler acepts flag ${FLAGS} - yes")
   ELSE(${VARIABLE})
     WRITE_FILE(${CMAKE_BINARY_DIR}/CMakeError.log
      "Determining if the CXX compiler accepts the flag ${FLAGS} failed with the following output:\n"      "${OUTPUT}\n" APPEND)
   ENDIF(${VARIABLE})
ENDMACRO(CHECK_CXX_ACCEPTS_FLAG)