2006-08-22 23:46:22 +04:00
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# - Check if the source code provided in the SOURCE argument compiles.
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# CHECK_CXX_SOURCE_COMPILES(SOURCE VAR)
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# - macro which checks if the source code compiles\
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# SOURCE - source code to try to compile
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# VAR - variable to store size if the type exists.
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#
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# The following variables may be set before calling this macro to
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# modify the way the check is run:
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#
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# CMAKE_REQUIRED_FLAGS = string of compile command line flags
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# CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
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# CMAKE_REQUIRED_INCLUDES = list of include directories
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# CMAKE_REQUIRED_LIBRARIES = list of libraries to link
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MACRO(CHECK_CXX_SOURCE_RUNS SOURCE VAR COMMENT)
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IF("HAVE_${VAR}" MATCHES "^HAVE_${VAR}$")
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SET(MACRO_CHECK_FUNCTION_DEFINITIONS
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"-D${VAR} ${CMAKE_REQUIRED_FLAGS}")
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IF(CMAKE_REQUIRED_LIBRARIES)
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SET(CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES
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"-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
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ELSE(CMAKE_REQUIRED_LIBRARIES)
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SET(CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES)
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ENDIF(CMAKE_REQUIRED_LIBRARIES)
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IF(CMAKE_REQUIRED_INCLUDES)
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SET(CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES
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"-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
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ELSE(CMAKE_REQUIRED_INCLUDES)
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SET(CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES)
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ENDIF(CMAKE_REQUIRED_INCLUDES)
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SET(CMAKE_EMPTY_INPUT_FILE_CONTENT "${SOURCE}")
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2006-08-22 23:48:19 +04:00
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CONFIGURE_FILE("${CMAKE_CURRENT_SOURCE_DIR}/CMakeEmptyInputFile.in"
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2006-08-22 23:51:52 +04:00
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"${CMAKE_BINARY_DIR}/CMakeFiles/CMakeTmp/src.cxx" IMMEDIATE)
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2006-08-22 23:46:22 +04:00
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MESSAGE(STATUS "Performing Test ${COMMENT}")
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TRY_RUN(${VAR} HAVE_${VAR}
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${CMAKE_BINARY_DIR}
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${CMAKE_BINARY_DIR}/CMakeFiles/CMakeTmp/src.cxx
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COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
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CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
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"${CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES}"
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"${CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES}"
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OUTPUT_VARIABLE OUTPUT)
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IF(HAVE_${VAR})
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SET(${VAR} 1 CACHE INTERNAL "Test ${COMMENT}")
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MESSAGE(STATUS "Performing Test ${COMMENT} - Success")
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FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeOutput.log
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"Performing C++ SOURCE FILE Test ${COMMENT} succeded with the following output:\n"
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"${OUTPUT}\n"
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"Source file was:\n${SOURCE}\n")
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ELSE(HAVE_${VAR})
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MESSAGE(STATUS "Performing Test ${COMMENT} - Failed")
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SET(${VAR} "" CACHE INTERNAL "Test ${COMMENT}")
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FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeError.log
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"Performing C++ SOURCE FILE Test ${COMMENT} failed with the following output:\n"
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"${OUTPUT}\n"
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"Source file was:\n${SOURCE}\n")
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ENDIF(HAVE_${VAR})
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ENDIF("HAVE_${VAR}" MATCHES "^HAVE_${VAR}$")
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ENDMACRO(CHECK_CXX_SOURCE_RUNS)
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