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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
#
#=============================================================================
# Copyright 2002-2009 Kitware, Inc.
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
# License text for the above reference.)
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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