42 lines
1.7 KiB
CMake
42 lines
1.7 KiB
CMake
#
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# Check if the type exists and determine size of type. if the type
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# exists, the size will be stored to the variable.
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#
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# CHECK_TYPE_SIZE - macro which checks the size of type
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# VARIABLE - variable to store size if the type exists.
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#
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MACRO(CHECK_TYPE_SIZE TYPE VARIABLE)
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SET(CMAKE_ALLOW_UNKNOWN_VARIABLE_READ_ACCESS 1)
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IF("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$")
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SET(MACRO_CHECK_TYPE_SIZE_FLAGS
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"-DCHECK_TYPE_SIZE_TYPE=\"${TYPE}\" ${CMAKE_REQUIRED_FLAGS}")
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IF(HAVE_SYS_TYPES_H)
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SET(MACRO_CHECK_TYPE_SIZE_FLAGS
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"${MACRO_CHECK_TYPE_SIZE_FLAGS} -DHAVE_SYS_TYPES_H")
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ENDIF(HAVE_SYS_TYPES_H)
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IF(HAVE_STDINT_H)
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SET(MACRO_CHECK_TYPE_SIZE_FLAGS "${MACRO_CHECK_TYPE_SIZE_FLAGS} -DHAVE_STDINT_H")
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ENDIF(HAVE_STDINT_H)
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MESSAGE(STATUS "Check size of ${TYPE}")
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IF(CMAKE_REQUIRED_LIBRARIES)
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SET(CHECK_TYPE_SIZE_ADD_LIBRARIES
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"-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
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ENDIF(CMAKE_REQUIRED_LIBRARIES)
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TRY_RUN(${VARIABLE} HAVE_${VARIABLE}
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${CMAKE_BINARY_DIR}
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${CMAKE_ROOT}/Modules/CheckTypeSize.c
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CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_TYPE_SIZE_FLAGS}
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"${CHECK_TYPE_SIZE_ADD_LIBRARIES}"
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OUTPUT_VARIABLE OUTPUT)
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IF(HAVE_${VARIABLE})
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MESSAGE(STATUS "Check size of ${TYPE} - done")
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ELSE(HAVE_${VARIABLE})
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MESSAGE(STATUS "Check size of ${TYPE} - failed")
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FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeError.log
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"Determining size of ${TYPE} failed with the following output:\n${OUTPUT}\n")
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ENDIF(HAVE_${VARIABLE})
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ENDIF("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$")
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SET(CMAKE_ALLOW_UNKNOWN_VARIABLE_READ_ACCESS )
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ENDMACRO(CHECK_TYPE_SIZE)
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