50 lines
1.9 KiB
CMake
50 lines
1.9 KiB
CMake
# - Check if the include file exists.
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# CHECK_INCLUDE_FILE(INCLUDE VARIABLE)
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# - macro which checks the include file exists.
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# INCLUDE - name of include file
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# VARIABLE - variable to return result
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#
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# an optional third argument is the CFlags to add to the compile line
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# or you can use CMAKE_REQUIRED_FLAGS
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#
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MACRO(CHECK_INCLUDE_FILE INCLUDE VARIABLE)
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IF("${VARIABLE}" MATCHES "^${VARIABLE}$")
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SET(MACRO_CHECK_INCLUDE_FILE_FLAGS ${CMAKE_REQUIRED_FLAGS})
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SET(CHECK_INCLUDE_FILE_VAR ${INCLUDE})
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CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CheckIncludeFile.c.in
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${CMAKE_BINARY_DIR}/CMakeTmp/CheckIncludeFile.c IMMEDIATE)
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MESSAGE(STATUS "Looking for ${INCLUDE}")
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IF(${ARGC} EQUAL 3)
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SET(CMAKE_C_FLAGS_SAVE ${CMAKE_C_FLAGS})
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SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${ARGV2}")
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ENDIF(${ARGC} EQUAL 3)
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TRY_COMPILE(${VARIABLE}
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${CMAKE_BINARY_DIR}
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${CMAKE_BINARY_DIR}/CMakeTmp/CheckIncludeFile.c
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CMAKE_FLAGS
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-DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_INCLUDE_FILE_FLAGS}
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OUTPUT_VARIABLE OUTPUT)
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IF(${ARGC} EQUAL 3)
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SET(CMAKE_C_FLAGS ${CMAKE_C_FLAGS_SAVE})
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ENDIF(${ARGC} EQUAL 3)
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IF(${VARIABLE})
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MESSAGE(STATUS "Looking for ${INCLUDE} - found")
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SET(${VARIABLE} 1 CACHE INTERNAL "Have include ${INCLUDE}")
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FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeOutput.log
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"Determining if the include file ${INCLUDE} "
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"exists passed with the following output:\n"
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"${OUTPUT}\n\n")
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ELSE(${VARIABLE})
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MESSAGE(STATUS "Looking for ${INCLUDE} - not found")
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SET(${VARIABLE} "" CACHE INTERNAL "Have include ${INCLUDE}")
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FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeError.log
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"Determining if the include file ${INCLUDE} "
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"exists failed with the following output:\n"
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"${OUTPUT}\n\n")
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ENDIF(${VARIABLE})
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ENDIF("${VARIABLE}" MATCHES "^${VARIABLE}$")
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ENDMACRO(CHECK_INCLUDE_FILE)
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