1#
2# Check if the type exists and determine size of type.  if the type
3# exists, the size will be stored to the variable.
4#
5# CHECK_TYPE_SIZE - macro which checks the size of type
6# VARIABLE - variable to store size if the type exists.
7# HAVE_${VARIABLE} - does the variable exists or not
8#
9
10MACRO (HDF_CHECK_TYPE_SIZE TYPE VARIABLE)
11  set (CMAKE_ALLOW_UNKNOWN_VARIABLE_READ_ACCESS 1)
12  if ("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$")
13    set (MACRO_CHECK_TYPE_SIZE_FLAGS
14        "-DCHECK_TYPE_SIZE_TYPE=\"${TYPE}\" ${CMAKE_REQUIRED_FLAGS}"
15    )
16    foreach (def HAVE_SYS_TYPES_H HAVE_STDINT_H HAVE_STDDEF_H HAVE_INTTYPES_H)
17      if ("${def}")
18        set (MACRO_CHECK_TYPE_SIZE_FLAGS "${MACRO_CHECK_TYPE_SIZE_FLAGS} -D${def}")
19      ENDIF("${def}")
20    endforeach (def)
21
22    message (STATUS "Check size of ${TYPE}")
23    if (CMAKE_REQUIRED_LIBRARIES)
24      set (CHECK_TYPE_SIZE_ADD_LIBRARIES
25          "-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}"
26      )
27    endif (CMAKE_REQUIRED_LIBRARIES)
28    TRY_RUN (${VARIABLE} HAVE_${VARIABLE}
29        ${CMAKE_BINARY_DIR}
30        ${HDF5_RESOURCES_DIR}/CheckTypeSize.c
31        CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_TYPE_SIZE_FLAGS}
32        "${CHECK_TYPE_SIZE_ADD_LIBRARIES}"
33        OUTPUT_VARIABLE OUTPUT
34    )
35    if (HAVE_${VARIABLE})
36      message (STATUS "Check size of ${TYPE} - done")
37      file (APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeOutput.log
38          "Determining size of ${TYPE} passed with the following output:\n${OUTPUT}\n\n"
39      )
40    else (HAVE_${VARIABLE})
41      message (STATUS "Check size of ${TYPE} - failed")
42      file (APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeError.log
43          "Determining size of ${TYPE} failed with the following output:\n${OUTPUT}\n\n"
44      )
45    endif (HAVE_${VARIABLE})
46  endif ("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$")
47  set (CMAKE_ALLOW_UNKNOWN_VARIABLE_READ_ACCESS)
48ENDMACRO (HDF_CHECK_TYPE_SIZE)
49
50