2005-12-14 21:51:08 +03:00
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# - Check if the source code provided in the SOURCE argument compiles.
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# CHECK_C_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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2005-08-01 07:02:22 +04:00
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# Checks the following optional VARIABLES (not arguments)
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2005-12-14 21:51:08 +03:00
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# CMAKE_REQUIRED_LIBRARIES - Link to extra libraries
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# CMAKE_REQUIRED_FLAGS - Extra flags to C compiler
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2005-08-01 07:02:22 +04:00
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#
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MACRO(CHECK_C_SOURCE_COMPILES SOURCE VAR)
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IF("${VAR}" MATCHES "^${VAR}$")
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SET(MACRO_CHECK_FUNCTION_DEFINITIONS
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"-D${VAR} ${CMAKE_REQUIRED_FLAGS}")
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IF(CMAKE_REQUIRED_LIBRARIES)
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SET(CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES
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"-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
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ENDIF(CMAKE_REQUIRED_LIBRARIES)
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IF(CMAKE_REQUIRED_INCLUDES)
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SET(CHECK_C_SOURCE_COMPILES_ADD_INCLUDES
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"-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
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ENDIF(CMAKE_REQUIRED_INCLUDES)
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FILE(WRITE "${CMAKE_BINARY_DIR}/CMakeTmp/src.c"
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"${SOURCE}")
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MESSAGE(STATUS "Performing Test ${VAR}")
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TRY_COMPILE(${VAR}
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${CMAKE_BINARY_DIR}
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${CMAKE_BINARY_DIR}/CMakeTmp/src.c
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CMAKE_FLAGS
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"${CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES}"
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"${CHECK_C_SOURCE_COMPILES_ADD_INCLUDES}"
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OUTPUT_VARIABLE OUTPUT)
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IF(${VAR})
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SET(${VAR} 1 CACHE INTERNAL "Test ${FUNCTION}")
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MESSAGE(STATUS "Performing Test ${VAR} - Success")
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WRITE_FILE(${CMAKE_BINARY_DIR}/CMakeOutput.log
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"Performing C SOURCE FILE Test ${VAR} succeded with the following output:\n"
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"${OUTPUT}\n"
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"Source file was:\n${SOURCE}\n" APPEND)
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ELSE(${VAR})
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MESSAGE(STATUS "Performing Test ${VAR} - Failed")
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SET(${VAR} "" CACHE INTERNAL "Test ${FUNCTION}")
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WRITE_FILE(${CMAKE_BINARY_DIR}/CMakeError.log
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"Performing C SOURCE FILE Test ${VAR} failed with the following output:\n"
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"${OUTPUT}\n"
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"Source file was:\n${SOURCE}\n" APPEND)
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ENDIF(${VAR})
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ENDIF("${VAR}" MATCHES "^${VAR}$")
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ENDMACRO(CHECK_C_SOURCE_COMPILES)
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