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
  20 function(_cmake_record_install_prefix )
  21   set(_CMAKE_SYSTEM_PREFIX_PATH_INSTALL_PREFIX_VALUE "${CMAKE_INSTALL_PREFIX}" PARENT_SCOPE)
  22   set(_CMAKE_SYSTEM_PREFIX_PATH_STAGING_PREFIX_VALUE "${CMAKE_STAGING_PREFIX}" PARENT_SCOPE)
  23   set(icount 0)
  24   set(scount 0)
  25   foreach(value IN LISTS CMAKE_SYSTEM_PREFIX_PATH)
  26     if(value STREQUAL CMAKE_INSTALL_PREFIX)
  27       math(EXPR icount "${icount}+1")
  28     endif()
  29     if(value STREQUAL CMAKE_STAGING_PREFIX)
  30       math(EXPR scount "${scount}+1")
  31     endif()
  32   endforeach()
  33   set(_CMAKE_SYSTEM_PREFIX_PATH_INSTALL_PREFIX_COUNT "${icount}" PARENT_SCOPE)
  34   set(_CMAKE_SYSTEM_PREFIX_PATH_STAGING_PREFIX_COUNT "${scount}" PARENT_SCOPE)
  35 endfunction()
  36
  37 # include Generic system information
  38 include(CMakeGenericSystem)
  39
  40 # 2. now include SystemName.cmake file to set the system specific information
  41 set(CMAKE_SYSTEM_INFO_FILE Platform/${CMAKE_SYSTEM_NAME})
  42
  43 include(${CMAKE_SYSTEM_INFO_FILE} OPTIONAL RESULT_VARIABLE _INCLUDED_SYSTEM_INFO_FILE)
  44
  45 if(NOT _INCLUDED_SYSTEM_INFO_FILE)
  46   message("System is unknown to cmake, create:\n${CMAKE_SYSTEM_INFO_FILE}"
  47           " to use this system, please post your config file on "
  48           "discourse.cmake.org so it can be added to cmake")
  49   if(EXISTS ${CMAKE_BINARY_DIR}/CMakeCache.txt)
  50     configure_file(${CMAKE_BINARY_DIR}/CMakeCache.txt
  51                    ${CMAKE_BINARY_DIR}/CopyOfCMakeCache.txt COPYONLY)
  52     message("Your CMakeCache.txt file was copied to CopyOfCMakeCache.txt. "
  53             "Please post that file on discourse.cmake.org.")
  54   endif()
  55 endif()
  56
  57 # optionally include a file which can do extra-generator specific things, e.g.
  58 # CMakeFindEclipseCDT4.cmake asks gcc for the system include dirs for the Eclipse CDT4 generator
  59 if(CMAKE_EXTRA_GENERATOR)
  60   string(REPLACE " " "" _CMAKE_EXTRA_GENERATOR_NO_SPACES ${CMAKE_EXTRA_GENERATOR} )
  61   include("CMakeFind${_CMAKE_EXTRA_GENERATOR_NO_SPACES}" OPTIONAL)
  62 endif()
  63
  64
  65 # for most systems a module is the same as a shared library
  66 # so unless the variable CMAKE_MODULE_EXISTS is set just
  67 # copy the values from the LIBRARY variables
  68 # this has to be done after the system information has been loaded
  69 if(NOT CMAKE_MODULE_EXISTS)
  70   set(CMAKE_SHARED_MODULE_PREFIX "${CMAKE_SHARED_LIBRARY_PREFIX}")
  71   set(CMAKE_SHARED_MODULE_SUFFIX "${CMAKE_SHARED_LIBRARY_SUFFIX}")
  72 endif()
  73
  74
  75 set(CMAKE_SYSTEM_SPECIFIC_INFORMATION_LOADED 1)