Modules/CMakeCInformation.cmake - third_party/cmake - Git at Google


 #=============================================================================
 # Copyright 2004-2011 Kitware, Inc.
 #
 # Distributed under the OSI-approved BSD License (the "License");
 # see accompanying file Copyright.txt for details.
 #
 # This software is distributed WITHOUT ANY WARRANTY; without even the
 # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 # See the License for more information.
 #=============================================================================
 # (To distribute this file outside of CMake, substitute the full
 #  License text for the above reference.)

 # This file sets the basic flags for the C language in CMake.
 # It also loads the available platform file for the system-compiler
 # if it exists.
 # It also loads a system - compiler - processor (or target hardware)
 # specific file, which is mainly useful for crosscompiling and embedded systems.

 # some compilers use different extensions (e.g. sdcc uses .rel)
 # so set the extension here first so it can be overridden by the compiler specific file
 if(UNIX)
   set(CMAKE_C_OUTPUT_EXTENSION .o)
 else()
   set(CMAKE_C_OUTPUT_EXTENSION .obj)
 endif()

 set(_INCLUDED_FILE 0)

 # Load compiler-specific information.
 if(CMAKE_C_COMPILER_ID)
   include(Compiler/${CMAKE_C_COMPILER_ID}-C OPTIONAL)
 endif()

 set(CMAKE_BASE_NAME)
 get_filename_component(CMAKE_BASE_NAME "${CMAKE_C_COMPILER}" NAME_WE)
 if(CMAKE_COMPILER_IS_GNUCC)
   set(CMAKE_BASE_NAME gcc)
 endif()


 # load a hardware specific file, mostly useful for embedded compilers
 if(CMAKE_SYSTEM_PROCESSOR)
   if(CMAKE_C_COMPILER_ID)
     include(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_C_COMPILER_ID}-C-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
   endif()
   if (NOT _INCLUDED_FILE)
     include(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME}-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL)
   endif ()
 endif()


 # load the system- and compiler specific files
 if(CMAKE_C_COMPILER_ID)
   include(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_C_COMPILER_ID}-C
     OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
 endif()
 if (NOT _INCLUDED_FILE)
   include(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME}
     OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
 endif ()
 # We specify the compiler information in the system file for some
 # platforms, but this language may not have been enabled when the file
 # was first included.  Include it again to get the language info.
 # Remove this when all compiler info is removed from system files.
 if (NOT _INCLUDED_FILE)
   include(Platform/${CMAKE_SYSTEM_NAME} OPTIONAL)
 endif ()

 if(CMAKE_C_SIZEOF_DATA_PTR)
   foreach(f ${CMAKE_C_ABI_FILES})
     include(${f})
   endforeach()
   unset(CMAKE_C_ABI_FILES)
 endif()

 # This should be included before the _INIT variables are
 # used to initialize the cache.  Since the rule variables
 # have if blocks on them, users can still define them here.
 # But, it should still be after the platform file so changes can
 # be made to those values.

 if(CMAKE_USER_MAKE_RULES_OVERRIDE)
   # Save the full path of the file so try_compile can use it.
   include(${CMAKE_USER_MAKE_RULES_OVERRIDE} RESULT_VARIABLE _override)
   set(CMAKE_USER_MAKE_RULES_OVERRIDE "${_override}")
 endif()

 if(CMAKE_USER_MAKE_RULES_OVERRIDE_C)
   # Save the full path of the file so try_compile can use it.
   include(${CMAKE_USER_MAKE_RULES_OVERRIDE_C} RESULT_VARIABLE _override)
   set(CMAKE_USER_MAKE_RULES_OVERRIDE_C "${_override}")
 endif()


 # for most systems a module is the same as a shared library
 # so unless the variable CMAKE_MODULE_EXISTS is set just
 # copy the values from the LIBRARY variables
 if(NOT CMAKE_MODULE_EXISTS)
   set(CMAKE_SHARED_MODULE_C_FLAGS ${CMAKE_SHARED_LIBRARY_C_FLAGS})
   set(CMAKE_SHARED_MODULE_CREATE_C_FLAGS ${CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS})
 endif()

 set(CMAKE_C_FLAGS_INIT "$ENV{CFLAGS} ${CMAKE_C_FLAGS_INIT}")
 # avoid just having a space as the initial value for the cache
 if(CMAKE_C_FLAGS_INIT STREQUAL " ")
   set(CMAKE_C_FLAGS_INIT)
 endif()
 set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS_INIT}" CACHE STRING
      "Flags used by the compiler during all build types.")

 if(NOT CMAKE_NOT_USING_CONFIG_FLAGS)
 # default build type is none
   if(NOT CMAKE_NO_BUILD_TYPE)
     set (CMAKE_BUILD_TYPE ${CMAKE_BUILD_TYPE_INIT} CACHE STRING
       "Choose the type of build, options are: None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel.")
   endif()
   set (CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG_INIT}" CACHE STRING
     "Flags used by the compiler during debug builds.")
   set (CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL_INIT}" CACHE STRING
     "Flags used by the compiler during release builds for minimum size.")
   set (CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE_INIT}" CACHE STRING
     "Flags used by the compiler during release builds.")
   set (CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO_INIT}" CACHE STRING
     "Flags used by the compiler during release builds with debug info.")
 endif()

 if(CMAKE_C_STANDARD_LIBRARIES_INIT)
   set(CMAKE_C_STANDARD_LIBRARIES "${CMAKE_C_STANDARD_LIBRARIES_INIT}"
     CACHE STRING "Libraries linked by default with all C applications.")
   mark_as_advanced(CMAKE_C_STANDARD_LIBRARIES)
 endif()

 include(CMakeCommonLanguageInclude)

 # now define the following rule variables

 # CMAKE_C_CREATE_SHARED_LIBRARY
 # CMAKE_C_CREATE_SHARED_MODULE
 # CMAKE_C_COMPILE_OBJECT
 # CMAKE_C_LINK_EXECUTABLE

 # variables supplied by the generator at use time
 # <TARGET>
 # <TARGET_BASE> the target without the suffix
 # <OBJECTS>
 # <OBJECT>
 # <LINK_LIBRARIES>
 # <FLAGS>
 # <LINK_FLAGS>

 # C compiler information
 # <CMAKE_C_COMPILER>
 # <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS>
 # <CMAKE_SHARED_MODULE_CREATE_C_FLAGS>
 # <CMAKE_C_LINK_FLAGS>

 # Static library tools
 # <CMAKE_AR>
 # <CMAKE_RANLIB>


 # create a C shared library
 if(NOT CMAKE_C_CREATE_SHARED_LIBRARY)
   set(CMAKE_C_CREATE_SHARED_LIBRARY
       "<CMAKE_C_COMPILER> <CMAKE_SHARED_LIBRARY_C_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <SONAME_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
 endif()

 # create a C shared module just copy the shared library rule
 if(NOT CMAKE_C_CREATE_SHARED_MODULE)
   set(CMAKE_C_CREATE_SHARED_MODULE ${CMAKE_C_CREATE_SHARED_LIBRARY})
 endif()

 # Create a static archive incrementally for large object file counts.
 # If CMAKE_C_CREATE_STATIC_LIBRARY is set it will override these.
 if(NOT DEFINED CMAKE_C_ARCHIVE_CREATE)
   set(CMAKE_C_ARCHIVE_CREATE "<CMAKE_AR> cr <TARGET> <LINK_FLAGS> <OBJECTS>")
 endif()
 if(NOT DEFINED CMAKE_C_ARCHIVE_APPEND)
   set(CMAKE_C_ARCHIVE_APPEND "<CMAKE_AR> r  <TARGET> <LINK_FLAGS> <OBJECTS>")
 endif()
 if(NOT DEFINED CMAKE_C_ARCHIVE_FINISH)
   set(CMAKE_C_ARCHIVE_FINISH "<CMAKE_RANLIB> <TARGET>")
 endif()

 # compile a C file into an object file
 if(NOT CMAKE_C_COMPILE_OBJECT)
   set(CMAKE_C_COMPILE_OBJECT
     "<CMAKE_C_COMPILER> <DEFINES> <FLAGS> -o <OBJECT>   -c <SOURCE>")
 endif()

 if(NOT CMAKE_C_LINK_EXECUTABLE)
   set(CMAKE_C_LINK_EXECUTABLE
     "<CMAKE_C_COMPILER> <FLAGS> <CMAKE_C_LINK_FLAGS> <LINK_FLAGS> <OBJECTS>  -o <TARGET> <LINK_LIBRARIES>")
 endif()

 if(NOT CMAKE_EXECUTABLE_RUNTIME_C_FLAG)
   set(CMAKE_EXECUTABLE_RUNTIME_C_FLAG ${CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG})
 endif()

 if(NOT CMAKE_EXECUTABLE_RUNTIME_C_FLAG_SEP)
   set(CMAKE_EXECUTABLE_RUNTIME_C_FLAG_SEP ${CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG_SEP})
 endif()

 if(NOT CMAKE_EXECUTABLE_RPATH_LINK_C_FLAG)
   set(CMAKE_EXECUTABLE_RPATH_LINK_C_FLAG ${CMAKE_SHARED_LIBRARY_RPATH_LINK_C_FLAG})
 endif()

 mark_as_advanced(
 CMAKE_C_FLAGS
 CMAKE_C_FLAGS_DEBUG
 CMAKE_C_FLAGS_MINSIZEREL
 CMAKE_C_FLAGS_RELEASE
 CMAKE_C_FLAGS_RELWITHDEBINFO
 )
 set(CMAKE_C_INFORMATION_LOADED 1)

	#=============================================================================
	# Copyright 2004-2011 Kitware, Inc.
	#
	# Distributed under the OSI-approved BSD License (the "License");
	# see accompanying file Copyright.txt for details.
	#
	# This software is distributed WITHOUT ANY WARRANTY; without even the
	# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	# See the License for more information.
	#=============================================================================
	# (To distribute this file outside of CMake, substitute the full
	# License text for the above reference.)

	# This file sets the basic flags for the C language in CMake.
	# It also loads the available platform file for the system-compiler
	# if it exists.
	# It also loads a system - compiler - processor (or target hardware)
	# specific file, which is mainly useful for crosscompiling and embedded systems.

	# some compilers use different extensions (e.g. sdcc uses .rel)
	# so set the extension here first so it can be overridden by the compiler specific file
	if(UNIX)
	set(CMAKE_C_OUTPUT_EXTENSION .o)
	else()
	set(CMAKE_C_OUTPUT_EXTENSION .obj)
	endif()

	set(_INCLUDED_FILE 0)

	# Load compiler-specific information.
	if(CMAKE_C_COMPILER_ID)
	include(Compiler/${CMAKE_C_COMPILER_ID}-C OPTIONAL)
	endif()

	set(CMAKE_BASE_NAME)
	get_filename_component(CMAKE_BASE_NAME "${CMAKE_C_COMPILER}" NAME_WE)
	if(CMAKE_COMPILER_IS_GNUCC)
	set(CMAKE_BASE_NAME gcc)
	endif()


	# load a hardware specific file, mostly useful for embedded compilers
	if(CMAKE_SYSTEM_PROCESSOR)
	if(CMAKE_C_COMPILER_ID)
	include(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_C_COMPILER_ID}-C-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
	endif()
	if (NOT _INCLUDED_FILE)
	include(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME}-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL)
	endif ()
	endif()


	# load the system- and compiler specific files
	if(CMAKE_C_COMPILER_ID)
	include(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_C_COMPILER_ID}-C
	OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
	endif()
	if (NOT _INCLUDED_FILE)
	include(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME}
	OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
	endif ()
	# We specify the compiler information in the system file for some
	# platforms, but this language may not have been enabled when the file
	# was first included. Include it again to get the language info.
	# Remove this when all compiler info is removed from system files.
	if (NOT _INCLUDED_FILE)
	include(Platform/${CMAKE_SYSTEM_NAME} OPTIONAL)
	endif ()

	if(CMAKE_C_SIZEOF_DATA_PTR)
	foreach(f ${CMAKE_C_ABI_FILES})
	include(${f})
	endforeach()
	unset(CMAKE_C_ABI_FILES)
	endif()

	# This should be included before the _INIT variables are
	# used to initialize the cache. Since the rule variables
	# have if blocks on them, users can still define them here.
	# But, it should still be after the platform file so changes can
	# be made to those values.

	if(CMAKE_USER_MAKE_RULES_OVERRIDE)
	# Save the full path of the file so try_compile can use it.
	include(${CMAKE_USER_MAKE_RULES_OVERRIDE} RESULT_VARIABLE _override)
	set(CMAKE_USER_MAKE_RULES_OVERRIDE "${_override}")
	endif()

	if(CMAKE_USER_MAKE_RULES_OVERRIDE_C)
	# Save the full path of the file so try_compile can use it.
	include(${CMAKE_USER_MAKE_RULES_OVERRIDE_C} RESULT_VARIABLE _override)
	set(CMAKE_USER_MAKE_RULES_OVERRIDE_C "${_override}")
	endif()


	# for most systems a module is the same as a shared library
	# so unless the variable CMAKE_MODULE_EXISTS is set just
	# copy the values from the LIBRARY variables
	if(NOT CMAKE_MODULE_EXISTS)
	set(CMAKE_SHARED_MODULE_C_FLAGS ${CMAKE_SHARED_LIBRARY_C_FLAGS})
	set(CMAKE_SHARED_MODULE_CREATE_C_FLAGS ${CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS})
	endif()

	set(CMAKE_C_FLAGS_INIT "$ENV{CFLAGS} ${CMAKE_C_FLAGS_INIT}")
	# avoid just having a space as the initial value for the cache
	if(CMAKE_C_FLAGS_INIT STREQUAL " ")
	set(CMAKE_C_FLAGS_INIT)
	endif()
	set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS_INIT}" CACHE STRING
	"Flags used by the compiler during all build types.")

	if(NOT CMAKE_NOT_USING_CONFIG_FLAGS)
	# default build type is none
	if(NOT CMAKE_NO_BUILD_TYPE)
	set (CMAKE_BUILD_TYPE ${CMAKE_BUILD_TYPE_INIT} CACHE STRING
	"Choose the type of build, options are: None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel.")
	endif()
	set (CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG_INIT}" CACHE STRING
	"Flags used by the compiler during debug builds.")
	set (CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL_INIT}" CACHE STRING
	"Flags used by the compiler during release builds for minimum size.")
	set (CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE_INIT}" CACHE STRING
	"Flags used by the compiler during release builds.")
	set (CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO_INIT}" CACHE STRING
	"Flags used by the compiler during release builds with debug info.")
	endif()

	if(CMAKE_C_STANDARD_LIBRARIES_INIT)
	set(CMAKE_C_STANDARD_LIBRARIES "${CMAKE_C_STANDARD_LIBRARIES_INIT}"
	CACHE STRING "Libraries linked by default with all C applications.")
	mark_as_advanced(CMAKE_C_STANDARD_LIBRARIES)
	endif()

	include(CMakeCommonLanguageInclude)

	# now define the following rule variables

	# CMAKE_C_CREATE_SHARED_LIBRARY
	# CMAKE_C_CREATE_SHARED_MODULE
	# CMAKE_C_COMPILE_OBJECT
	# CMAKE_C_LINK_EXECUTABLE

	# variables supplied by the generator at use time
	# <TARGET>
	# <TARGET_BASE> the target without the suffix
	# <OBJECTS>
	# <OBJECT>
	# <LINK_LIBRARIES>
	# <FLAGS>
	# <LINK_FLAGS>

	# C compiler information
	# <CMAKE_C_COMPILER>
	# <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS>
	# <CMAKE_SHARED_MODULE_CREATE_C_FLAGS>
	# <CMAKE_C_LINK_FLAGS>

	# Static library tools
	# <CMAKE_AR>
	# <CMAKE_RANLIB>


	# create a C shared library
	if(NOT CMAKE_C_CREATE_SHARED_LIBRARY)
	set(CMAKE_C_CREATE_SHARED_LIBRARY
	"<CMAKE_C_COMPILER> <CMAKE_SHARED_LIBRARY_C_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <SONAME_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
	endif()

	# create a C shared module just copy the shared library rule
	if(NOT CMAKE_C_CREATE_SHARED_MODULE)
	set(CMAKE_C_CREATE_SHARED_MODULE ${CMAKE_C_CREATE_SHARED_LIBRARY})
	endif()

	# Create a static archive incrementally for large object file counts.
	# If CMAKE_C_CREATE_STATIC_LIBRARY is set it will override these.
	if(NOT DEFINED CMAKE_C_ARCHIVE_CREATE)
	set(CMAKE_C_ARCHIVE_CREATE "<CMAKE_AR> cr <TARGET> <LINK_FLAGS> <OBJECTS>")
	endif()
	if(NOT DEFINED CMAKE_C_ARCHIVE_APPEND)
	set(CMAKE_C_ARCHIVE_APPEND "<CMAKE_AR> r <TARGET> <LINK_FLAGS> <OBJECTS>")
	endif()
	if(NOT DEFINED CMAKE_C_ARCHIVE_FINISH)
	set(CMAKE_C_ARCHIVE_FINISH "<CMAKE_RANLIB> <TARGET>")
	endif()

	# compile a C file into an object file
	if(NOT CMAKE_C_COMPILE_OBJECT)
	set(CMAKE_C_COMPILE_OBJECT
	"<CMAKE_C_COMPILER> <DEFINES> <FLAGS> -o <OBJECT> -c <SOURCE>")
	endif()

	if(NOT CMAKE_C_LINK_EXECUTABLE)
	set(CMAKE_C_LINK_EXECUTABLE
	"<CMAKE_C_COMPILER> <FLAGS> <CMAKE_C_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>")
	endif()

	if(NOT CMAKE_EXECUTABLE_RUNTIME_C_FLAG)
	set(CMAKE_EXECUTABLE_RUNTIME_C_FLAG ${CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG})
	endif()

	if(NOT CMAKE_EXECUTABLE_RUNTIME_C_FLAG_SEP)
	set(CMAKE_EXECUTABLE_RUNTIME_C_FLAG_SEP ${CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG_SEP})
	endif()

	if(NOT CMAKE_EXECUTABLE_RPATH_LINK_C_FLAG)
	set(CMAKE_EXECUTABLE_RPATH_LINK_C_FLAG ${CMAKE_SHARED_LIBRARY_RPATH_LINK_C_FLAG})
	endif()

	mark_as_advanced(
	CMAKE_C_FLAGS
	CMAKE_C_FLAGS_DEBUG
	CMAKE_C_FLAGS_MINSIZEREL
	CMAKE_C_FLAGS_RELEASE
	CMAKE_C_FLAGS_RELWITHDEBINFO
	)
	set(CMAKE_C_INFORMATION_LOADED 1)