# # Check if the type exists and determine size of type. if the type # exists, the size will be stored to the variable. # # CHECK_TYPE_SIZE - macro which checks the size of type # VARIABLE - variable to store size if the type exists. # HAVE_${VARIABLE} - does the variable exists or not # macro (HDF_CHECK_TYPE_SIZE TYPE VARIABLE) set (CMAKE_ALLOW_UNKNOWN_VARIABLE_READ_ACCESS 1) if ("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$") set (MACRO_CHECK_TYPE_SIZE_FLAGS "-DCHECK_TYPE_SIZE_TYPE=\"${TYPE}\" ${CMAKE_REQUIRED_FLAGS}" ) foreach (def HAVE_SYS_TYPES_H HAVE_STDINT_H HAVE_STDDEF_H HAVE_INTTYPES_H) if ("${def}") set (MACRO_CHECK_TYPE_SIZE_FLAGS "${MACRO_CHECK_TYPE_SIZE_FLAGS} -D${def}") endif () endforeach () message (STATUS "Check size of ${TYPE}") if (CMAKE_REQUIRED_LIBRARIES) set (CHECK_TYPE_SIZE_ADD_LIBRARIES "-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}" ) endif () try_run (${VARIABLE} HAVE_${VARIABLE} ${CMAKE_BINARY_DIR} ${HDF_RESOURCES_EXT_DIR}/CheckTypeSize.c CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_TYPE_SIZE_FLAGS} "${CHECK_TYPE_SIZE_ADD_LIBRARIES}" OUTPUT_VARIABLE OUTPUT ) if (HAVE_${VARIABLE}) message (STATUS "Check size of ${TYPE} - done") file (APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeOutput.log "Determining size of ${TYPE} passed with the following output:\n${OUTPUT}\n\n" ) else () message (STATUS "Check size of ${TYPE} - failed") file (APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeError.log "Determining size of ${TYPE} failed with the following output:\n${OUTPUT}\n\n" ) endif () endif () set (CMAKE_ALLOW_UNKNOWN_VARIABLE_READ_ACCESS) endmacro ()