Modules/CMakeBackwardCompatibilityC.cmake

   1 # Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
   2 # file Copyright.txt or https://cmake.org/licensing for details.
   3
   4
   5 if(NOT CMAKE_SKIP_COMPATIBILITY_TESTS)
   6   # Old CMake versions did not support OS X universal binaries anyway,
   7   # so just get through this with at least some size for the types.
   8   list(LENGTH CMAKE_OSX_ARCHITECTURES NUM_ARCHS)
   9   if(${NUM_ARCHS} GREATER 1)
  10     if(NOT DEFINED CMAKE_TRY_COMPILE_OSX_ARCHITECTURES)
  11       message(WARNING "This module does not work with OS X universal binaries.")
  12       set(__ERASE_CMAKE_TRY_COMPILE_OSX_ARCHITECTURES 1)
  13       list(GET CMAKE_OSX_ARCHITECTURES 0 CMAKE_TRY_COMPILE_OSX_ARCHITECTURES)
  14     endif()
  15   endif()
  16
  17   include (CheckTypeSize)
  18   CHECK_TYPE_SIZE(int      CMAKE_SIZEOF_INT)
  19   CHECK_TYPE_SIZE(long     CMAKE_SIZEOF_LONG)
  20   CHECK_TYPE_SIZE("void*"  CMAKE_SIZEOF_VOID_P)
  21   CHECK_TYPE_SIZE(char     CMAKE_SIZEOF_CHAR)
  22   CHECK_TYPE_SIZE(short    CMAKE_SIZEOF_SHORT)
  23   CHECK_TYPE_SIZE(float    CMAKE_SIZEOF_FLOAT)
  24   CHECK_TYPE_SIZE(double   CMAKE_SIZEOF_DOUBLE)
  25
  26   include (CheckIncludeFile)
  27   CHECK_INCLUDE_FILE("limits.h"       CMAKE_HAVE_LIMITS_H)
  28   CHECK_INCLUDE_FILE("unistd.h"       CMAKE_HAVE_UNISTD_H)
  29   CHECK_INCLUDE_FILE("pthread.h"      CMAKE_HAVE_PTHREAD_H)
  30
  31   include (CheckIncludeFiles)
  32   CHECK_INCLUDE_FILES("sys/types.h;sys/prctl.h"    CMAKE_HAVE_SYS_PRCTL_H)
  33
  34   include (TestBigEndian)
  35   TEST_BIG_ENDIAN(CMAKE_WORDS_BIGENDIAN)
  36   include (FindX11)
  37
  38   if("${X11_X11_INCLUDE_PATH}" STREQUAL "/usr/include")
  39     set (CMAKE_X_CFLAGS "" CACHE STRING "X11 extra flags.")
  40   else()
  41     set (CMAKE_X_CFLAGS "-I${X11_X11_INCLUDE_PATH}" CACHE STRING
  42          "X11 extra flags.")
  43   endif()
  44   set (CMAKE_X_LIBS "${X11_LIBRARIES}" CACHE STRING
  45        "Libraries and options used in X11 programs.")
  46   set (CMAKE_HAS_X "${X11_FOUND}" CACHE INTERNAL "Is X11 around.")
  47
  48   include (FindThreads)
  49
  50   set (CMAKE_THREAD_LIBS        "${CMAKE_THREAD_LIBS_INIT}" CACHE STRING
  51     "Thread library used.")
  52
  53   set (CMAKE_USE_PTHREADS       "${CMAKE_USE_PTHREADS_INIT}" CACHE BOOL
  54      "Use the pthreads library.")
  55
  56   set (CMAKE_USE_WIN32_THREADS  "${CMAKE_USE_WIN32_THREADS_INIT}" CACHE BOOL
  57        "Use the win32 thread library.")
  58
  59   set (CMAKE_HP_PTHREADS        ${CMAKE_HP_PTHREADS_INIT} CACHE BOOL
  60      "Use HP pthreads.")
  61
  62   if(__ERASE_CMAKE_TRY_COMPILE_OSX_ARCHITECTURES)
  63     set(CMAKE_TRY_COMPILE_OSX_ARCHITECTURES)
  64     set(__ERASE_CMAKE_TRY_COMPILE_OSX_ARCHITECTURES)
  65   endif()
  66 endif()
  67
  68 mark_as_advanced(
  69 CMAKE_HP_PTHREADS
  70 CMAKE_THREAD_LIBS
  71 CMAKE_USE_PTHREADS
  72 CMAKE_USE_WIN32_THREADS
  73 CMAKE_X_CFLAGS
  74 CMAKE_X_LIBS
  75 )
  76