1 # - Check sizeof a type
2 # CHECK_TYPE_SIZE(TYPE VARIABLE)
3 # Check if the type exists and determine size of type. if the type
4 # exists, the size will be stored to the variable.
6 # VARIABLE - variable to store size if the type exists.
7 # HAVE_${VARIABLE} - does the variable exists or not
9 macro(CHECK_TYPE_SIZE TYPE VARIABLE)
10 set(CMAKE_ALLOW_UNKNOWN_VARIABLE_READ_ACCESS 1)
11 if(NOT DEFINED ${VARIABLE})
12 if("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$")
13 set(CHECK_TYPE_SIZE_TYPE "${TYPE}")
14 set(MACRO_CHECK_TYPE_SIZE_FLAGS
15 "${CMAKE_REQUIRED_FLAGS}")
16 foreach(def HAVE_SYS_TYPES_H HAVE_STDINT_H HAVE_STDDEF_H)
18 set(MACRO_CHECK_TYPE_SIZE_FLAGS
19 "${MACRO_CHECK_TYPE_SIZE_FLAGS} -D${def}")
22 set(CHECK_TYPE_SIZE_PREMAIN)
23 foreach(def ${CMAKE_EXTRA_INCLUDE_FILES})
24 set(CHECK_TYPE_SIZE_PREMAIN "${CHECK_TYPE_SIZE_PREMAIN}#include \"${def}\"\n")
27 "${CMAKE_CURRENT_SOURCE_DIR}/CMake/CheckTypeSize.c.in"
28 "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckTypeSize.c"
31 "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckTypeSize.c"
32 CHECK_TYPE_SIZE_FILE_CONTENT)
33 message(STATUS "Check size of ${TYPE}")
34 if(CMAKE_REQUIRED_LIBRARIES)
35 set(CHECK_TYPE_SIZE_ADD_LIBRARIES
36 "-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
37 endif(CMAKE_REQUIRED_LIBRARIES)
38 try_run(${VARIABLE} HAVE_${VARIABLE}
40 "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckTypeSize.c"
41 CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_TYPE_SIZE_FLAGS}
42 "${CHECK_TYPE_SIZE_ADD_LIBRARIES}"
43 OUTPUT_VARIABLE OUTPUT)
45 message(STATUS "Check size of ${TYPE} - done")
46 file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
47 "Determining size of ${TYPE} passed with the following output:\n${OUTPUT}\n\n")
48 else(HAVE_${VARIABLE})
49 message(STATUS "Check size of ${TYPE} - failed")
50 file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
51 "Determining size of ${TYPE} failed with the following output:\n${OUTPUT}\nCheckTypeSize.c:\n${CHECK_TYPE_SIZE_FILE_CONTENT}\n\n")
52 endif(HAVE_${VARIABLE})
53 endif("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$")
54 endif(NOT DEFINED ${VARIABLE})
55 set(CMAKE_ALLOW_UNKNOWN_VARIABLE_READ_ACCESS )
56 endmacro(CHECK_TYPE_SIZE)