Modules/CMakeSystemSpecificInformation.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 # This file is included by cmGlobalGenerator::EnableLanguage.
   6 # It is included after the compiler has been determined, so
   7 # we know things like the compiler name and if the compiler is gnu.
   8
   9 # before cmake 2.6 these variables were set in cmMakefile.cxx. This is still
  10 # done to keep scripts and custom language and compiler modules working.
  11 # But they are reset here and set again in the platform files for the target
  12 # platform, so they can be used for testing the target platform instead
  13 # of testing the host platform.
  14 set(APPLE  )
  15 set(UNIX   )
  16 set(CYGWIN )
  17 set(MSYS )
  18 set(WIN32  )
  19 set(BSD )
  20 set(LINUX )
  21
  22 function(_cmake_record_install_prefix )
  23   set(_CMAKE_SYSTEM_PREFIX_PATH_INSTALL_PREFIX_VALUE "${CMAKE_INSTALL_PREFIX}" PARENT_SCOPE)
  24   set(_CMAKE_SYSTEM_PREFIX_PATH_STAGING_PREFIX_VALUE "${CMAKE_STAGING_PREFIX}" PARENT_SCOPE)
  25   set(icount 0)
  26   set(scount 0)
  27   foreach(value IN LISTS CMAKE_SYSTEM_PREFIX_PATH)
  28     if(value STREQUAL CMAKE_INSTALL_PREFIX)
  29       math(EXPR icount "${icount}+1")
  30     endif()
  31     if(value STREQUAL CMAKE_STAGING_PREFIX)
  32       math(EXPR scount "${scount}+1")
  33     endif()
  34   endforeach()
  35   set(_CMAKE_SYSTEM_PREFIX_PATH_INSTALL_PREFIX_COUNT "${icount}" PARENT_SCOPE)
  36   set(_CMAKE_SYSTEM_PREFIX_PATH_STAGING_PREFIX_COUNT "${scount}" PARENT_SCOPE)
  37 endfunction()
  38
  39 # include Generic system information
  40 include(CMakeGenericSystem)
  41
  42 # 2. now include SystemName.cmake file to set the system specific information
  43 set(CMAKE_SYSTEM_INFO_FILE Platform/${CMAKE_SYSTEM_NAME})
  44
  45 include(${CMAKE_SYSTEM_INFO_FILE} OPTIONAL RESULT_VARIABLE _INCLUDED_SYSTEM_INFO_FILE)
  46
  47 if(NOT _INCLUDED_SYSTEM_INFO_FILE)
  48   message("System is unknown to cmake, create:\n${CMAKE_SYSTEM_INFO_FILE}"
  49           " to use this system, please post your config file on "
  50           "discourse.cmake.org so it can be added to cmake")
  51   if(EXISTS ${CMAKE_BINARY_DIR}/CMakeCache.txt)
  52     configure_file(${CMAKE_BINARY_DIR}/CMakeCache.txt
  53                    ${CMAKE_BINARY_DIR}/CopyOfCMakeCache.txt COPYONLY)
  54     message("Your CMakeCache.txt file was copied to CopyOfCMakeCache.txt. "
  55             "Please post that file on discourse.cmake.org.")
  56   endif()
  57 endif()
  58
  59 # optionally include a file which can do extra-generator specific things, e.g.
  60 # CMakeFindEclipseCDT4.cmake asks gcc for the system include dirs for the Eclipse CDT4 generator
  61 if(CMAKE_EXTRA_GENERATOR)
  62   string(REPLACE " " "" _CMAKE_EXTRA_GENERATOR_NO_SPACES ${CMAKE_EXTRA_GENERATOR} )
  63   include("CMakeFind${_CMAKE_EXTRA_GENERATOR_NO_SPACES}" OPTIONAL)
  64 endif()
  65
  66
  67 # for most systems a module is the same as a shared library
  68 # so unless the variable CMAKE_MODULE_EXISTS is set just
  69 # copy the values from the LIBRARY variables
  70 # this has to be done after the system information has been loaded
  71 if(NOT CMAKE_MODULE_EXISTS)
  72   set(CMAKE_SHARED_MODULE_PREFIX "${CMAKE_SHARED_LIBRARY_PREFIX}")
  73   set(CMAKE_SHARED_MODULE_SUFFIX "${CMAKE_SHARED_LIBRARY_SUFFIX}")
  74 endif()
  75
  76
  77 set(CMAKE_SYSTEM_SPECIFIC_INFORMATION_LOADED 1)