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# - Test CXX compiler for a flag
# Check if the CXX compiler accepts a flag
#
# Macro CHECK_CXX_ACCEPTS_FLAG(FLAGS VARIABLE) -
# checks if the function exists
# FLAGS - the flags to try
# VARIABLE - variable to store the result
#
MACRO(CHECK_CXX_ACCEPTS_FLAG FLAGS VARIABLE)
IF(NOT DEFINED ${VARIABLE})
MESSAGE(STATUS "Checking to see if CXX compiler accepts 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 accepts flag ${FLAGS} - yes")
FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"Determining if the CXX compiler accepts the flag ${FLAGS} passed with "
"the following output:\n${OUTPUT}\n\n")
ELSE(${VARIABLE})
MESSAGE(STATUS "Checking to see if CXX compiler accepts flag ${FLAGS} - no")
FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
"Determining if the CXX compiler accepts the flag ${FLAGS} failed with "
"the following output:\n${OUTPUT}\n\n")
ENDIF(${VARIABLE})
ENDIF(NOT DEFINED ${VARIABLE})
ENDMACRO(CHECK_CXX_ACCEPTS_FLAG)
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