3.8.2/share/cmake-3.8/Modules/FindOpenGL.cmake - platform/prebuilts/cmake/linux-x86 - Git at Google

 # Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
 # file Copyright.txt or https://cmake.org/licensing for details.

 #.rst:
 # FindOpenGL
 # ----------
 #
 # FindModule for OpenGL and GLU.
 #
 # IMPORTED Targets
 # ^^^^^^^^^^^^^^^^
 #
 # This module defines the :prop_tgt:`IMPORTED` targets:
 #
 # ``OpenGL::GL``
 #  Defined if the system has OpenGL.
 # ``OpenGL::GLU``
 #  Defined if the system has GLU.
 #
 # Result Variables
 # ^^^^^^^^^^^^^^^^
 #
 # This module sets the following variables:
 #
 # ``OPENGL_FOUND``
 #  True, if the system has OpenGL.
 # ``OPENGL_XMESA_FOUND``
 #  True, if the system has XMESA.
 # ``OPENGL_GLU_FOUND``
 #  True, if the system has GLU.
 # ``OPENGL_INCLUDE_DIR``
 #  Path to the OpenGL include directory.
 # ``OPENGL_LIBRARIES``
 #  Paths to the OpenGL and GLU libraries.
 #
 # If you want to use just GL you can use these values:
 #
 # ``OPENGL_gl_LIBRARY``
 #  Path to the OpenGL library.
 # ``OPENGL_glu_LIBRARY``
 #  Path to the GLU library.
 #
 # OSX Specific
 # ^^^^^^^^^^^^
 #
 # On OSX default to using the framework version of OpenGL. People will
 # have to change the cache values of OPENGL_glu_LIBRARY and
 # OPENGL_gl_LIBRARY to use OpenGL with X11 on OSX.


 set(_OpenGL_REQUIRED_VARS OPENGL_gl_LIBRARY)

 if (CYGWIN)

   find_path(OPENGL_INCLUDE_DIR GL/gl.h )
   list(APPEND _OpenGL_REQUIRED_VARS OPENGL_INCLUDE_DIR)

   find_library(OPENGL_gl_LIBRARY opengl32 )

   find_library(OPENGL_glu_LIBRARY glu32 )

 elseif (WIN32)

   if(BORLAND)
     set (OPENGL_gl_LIBRARY import32 CACHE STRING "OpenGL library for win32")
     set (OPENGL_glu_LIBRARY import32 CACHE STRING "GLU library for win32")
   else()
     set (OPENGL_gl_LIBRARY opengl32 CACHE STRING "OpenGL library for win32")
     set (OPENGL_glu_LIBRARY glu32 CACHE STRING "GLU library for win32")
   endif()

 elseif (APPLE)

   # The OpenGL.framework provides both gl and glu
   find_library(OPENGL_gl_LIBRARY OpenGL DOC "OpenGL library for OS X")
   find_library(OPENGL_glu_LIBRARY OpenGL DOC
     "GLU library for OS X (usually same as OpenGL library)")
   find_path(OPENGL_INCLUDE_DIR OpenGL/gl.h DOC "Include for OpenGL on OS X")
   list(APPEND _OpenGL_REQUIRED_VARS OPENGL_INCLUDE_DIR)

 else()
   if (CMAKE_SYSTEM_NAME MATCHES "HP-UX")
     # Handle HP-UX cases where we only want to find OpenGL in either hpux64
     # or hpux32 depending on if we're doing a 64 bit build.
     if(CMAKE_SIZEOF_VOID_P EQUAL 4)
       set(_OPENGL_LIB_PATH
         /opt/graphics/OpenGL/lib/hpux32/)
     else()
       set(_OPENGL_LIB_PATH
         /opt/graphics/OpenGL/lib/hpux64/
         /opt/graphics/OpenGL/lib/pa20_64)
     endif()
   elseif(CMAKE_SYSTEM_NAME STREQUAL Haiku)
     set(_OPENGL_LIB_PATH
       /boot/develop/lib/x86)
     set(_OPENGL_INCLUDE_PATH
       /boot/develop/headers/os/opengl)
   endif()

   # The first line below is to make sure that the proper headers
   # are used on a Linux machine with the NVidia drivers installed.
   # They replace Mesa with NVidia's own library but normally do not
   # install headers and that causes the linking to
   # fail since the compiler finds the Mesa headers but NVidia's library.
   # Make sure the NVIDIA directory comes BEFORE the others.
   #  - Atanas Georgiev <[email protected]>

   find_path(OPENGL_INCLUDE_DIR GL/gl.h
     /usr/share/doc/NVIDIA_GLX-1.0/include
     /usr/openwin/share/include
     /opt/graphics/OpenGL/include /usr/X11R6/include
     ${_OPENGL_INCLUDE_PATH}
   )
   list(APPEND _OpenGL_REQUIRED_VARS OPENGL_INCLUDE_DIR)

   find_path(OPENGL_xmesa_INCLUDE_DIR GL/xmesa.h
     /usr/share/doc/NVIDIA_GLX-1.0/include
     /usr/openwin/share/include
     /opt/graphics/OpenGL/include /usr/X11R6/include
   )

   find_library(OPENGL_gl_LIBRARY
     NAMES GL MesaGL
     PATHS /opt/graphics/OpenGL/lib
           /usr/openwin/lib
           /usr/shlib /usr/X11R6/lib
           ${_OPENGL_LIB_PATH}
   )

   unset(_OPENGL_INCLUDE_PATH)
   unset(_OPENGL_LIB_PATH)

   find_library(OPENGL_glu_LIBRARY
     NAMES GLU MesaGLU
     PATHS ${OPENGL_gl_LIBRARY}
           /opt/graphics/OpenGL/lib
           /usr/openwin/lib
           /usr/shlib /usr/X11R6/lib
   )

 endif ()

 if(OPENGL_gl_LIBRARY)

     if(OPENGL_xmesa_INCLUDE_DIR)
       set( OPENGL_XMESA_FOUND "YES" )
     else()
       set( OPENGL_XMESA_FOUND "NO" )
     endif()

     set( OPENGL_LIBRARIES  ${OPENGL_gl_LIBRARY} ${OPENGL_LIBRARIES})
     if(OPENGL_glu_LIBRARY)
       set( OPENGL_GLU_FOUND "YES" )
       if(NOT "${OPENGL_glu_LIBRARY}" STREQUAL "${OPENGL_gl_LIBRARY}")
         set( OPENGL_LIBRARIES ${OPENGL_glu_LIBRARY} ${OPENGL_LIBRARIES} )
       endif()
     else()
       set( OPENGL_GLU_FOUND "NO" )
     endif()

     # This deprecated setting is for backward compatibility with CMake1.4
     set (OPENGL_LIBRARY ${OPENGL_LIBRARIES})

 endif()

 # This deprecated setting is for backward compatibility with CMake1.4
 set(OPENGL_INCLUDE_PATH ${OPENGL_INCLUDE_DIR})

 include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
 FIND_PACKAGE_HANDLE_STANDARD_ARGS(OpenGL REQUIRED_VARS ${_OpenGL_REQUIRED_VARS})
 unset(_OpenGL_REQUIRED_VARS)

 # OpenGL:: targets
 if(OPENGL_FOUND)
   if(NOT TARGET OpenGL::GL)
     if(IS_ABSOLUTE "${OPENGL_gl_LIBRARY}")
       add_library(OpenGL::GL UNKNOWN IMPORTED)
       if(OPENGL_gl_LIBRARY MATCHES "/([^/]+)\\.framework$")
         set(_gl_fw "${OPENGL_gl_LIBRARY}/${CMAKE_MATCH_1}")
         if(EXISTS "${_gl_fw}.tbd")
           set(_gl_fw "${_gl_fw}.tbd")
         endif()
         set_target_properties(OpenGL::GL PROPERTIES
           IMPORTED_LOCATION "${_gl_fw}")
       else()
         set_target_properties(OpenGL::GL PROPERTIES
           IMPORTED_LOCATION "${OPENGL_gl_LIBRARY}")
       endif()
     else()
       add_library(OpenGL::GL INTERFACE IMPORTED)
       set_target_properties(OpenGL::GL PROPERTIES
         IMPORTED_LIBNAME "${OPENGL_gl_LIBRARY}")
     endif()
     set_target_properties(OpenGL::GL PROPERTIES
       INTERFACE_INCLUDE_DIRECTORIES "${OPENGL_INCLUDE_DIR}")
   endif()

   if(OPENGL_GLU_FOUND AND NOT TARGET OpenGL::GLU)
     if(IS_ABSOLUTE "${OPENGL_glu_LIBRARY}")
       add_library(OpenGL::GLU UNKNOWN IMPORTED)
       if(OPENGL_glu_LIBRARY MATCHES "/([^/]+)\\.framework$")
         set(_glu_fw "${OPENGL_glu_LIBRARY}/${CMAKE_MATCH_1}")
         if(EXISTS "${_glu_fw}.tbd")
           set(_glu_fw "${_glu_fw}.tbd")
         endif()
         set_target_properties(OpenGL::GLU PROPERTIES
           IMPORTED_LOCATION "${_glu_fw}")
       else()
         set_target_properties(OpenGL::GLU PROPERTIES
           IMPORTED_LOCATION "${OPENGL_glu_LIBRARY}")
       endif()
     else()
       add_library(OpenGL::GLU INTERFACE IMPORTED)
       set_target_properties(OpenGL::GLU PROPERTIES
         IMPORTED_LIBNAME "${OPENGL_glu_LIBRARY}")
     endif()
     set_target_properties(OpenGL::GLU PROPERTIES
       INTERFACE_LINK_LIBRARIES OpenGL::GL)
   endif()
 endif()

 mark_as_advanced(
   OPENGL_INCLUDE_DIR
   OPENGL_xmesa_INCLUDE_DIR
   OPENGL_glu_LIBRARY
   OPENGL_gl_LIBRARY
 )
	# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
	# file Copyright.txt or https://cmake.org/licensing for details.

	#.rst:
	# FindOpenGL
	# ----------
	#
	# FindModule for OpenGL and GLU.
	#
	# IMPORTED Targets
	# ^^^^^^^^^^^^^^^^
	#
	# This module defines the :prop_tgt:`IMPORTED` targets:
	#
	# ``OpenGL::GL``
	# Defined if the system has OpenGL.
	# ``OpenGL::GLU``
	# Defined if the system has GLU.
	#
	# Result Variables
	# ^^^^^^^^^^^^^^^^
	#
	# This module sets the following variables:
	#
	# ``OPENGL_FOUND``
	# True, if the system has OpenGL.
	# ``OPENGL_XMESA_FOUND``
	# True, if the system has XMESA.
	# ``OPENGL_GLU_FOUND``
	# True, if the system has GLU.
	# ``OPENGL_INCLUDE_DIR``
	# Path to the OpenGL include directory.
	# ``OPENGL_LIBRARIES``
	# Paths to the OpenGL and GLU libraries.
	#
	# If you want to use just GL you can use these values:
	#
	# ``OPENGL_gl_LIBRARY``
	# Path to the OpenGL library.
	# ``OPENGL_glu_LIBRARY``
	# Path to the GLU library.
	#
	# OSX Specific
	# ^^^^^^^^^^^^
	#
	# On OSX default to using the framework version of OpenGL. People will
	# have to change the cache values of OPENGL_glu_LIBRARY and
	# OPENGL_gl_LIBRARY to use OpenGL with X11 on OSX.


	set(_OpenGL_REQUIRED_VARS OPENGL_gl_LIBRARY)

	if (CYGWIN)

	find_path(OPENGL_INCLUDE_DIR GL/gl.h )
	list(APPEND _OpenGL_REQUIRED_VARS OPENGL_INCLUDE_DIR)

	find_library(OPENGL_gl_LIBRARY opengl32 )

	find_library(OPENGL_glu_LIBRARY glu32 )

	elseif (WIN32)

	if(BORLAND)
	set (OPENGL_gl_LIBRARY import32 CACHE STRING "OpenGL library for win32")
	set (OPENGL_glu_LIBRARY import32 CACHE STRING "GLU library for win32")
	else()
	set (OPENGL_gl_LIBRARY opengl32 CACHE STRING "OpenGL library for win32")
	set (OPENGL_glu_LIBRARY glu32 CACHE STRING "GLU library for win32")
	endif()

	elseif (APPLE)

	# The OpenGL.framework provides both gl and glu
	find_library(OPENGL_gl_LIBRARY OpenGL DOC "OpenGL library for OS X")
	find_library(OPENGL_glu_LIBRARY OpenGL DOC
	"GLU library for OS X (usually same as OpenGL library)")
	find_path(OPENGL_INCLUDE_DIR OpenGL/gl.h DOC "Include for OpenGL on OS X")
	list(APPEND _OpenGL_REQUIRED_VARS OPENGL_INCLUDE_DIR)

	else()
	if (CMAKE_SYSTEM_NAME MATCHES "HP-UX")
	# Handle HP-UX cases where we only want to find OpenGL in either hpux64
	# or hpux32 depending on if we're doing a 64 bit build.
	if(CMAKE_SIZEOF_VOID_P EQUAL 4)
	set(_OPENGL_LIB_PATH
	/opt/graphics/OpenGL/lib/hpux32/)
	else()
	set(_OPENGL_LIB_PATH
	/opt/graphics/OpenGL/lib/hpux64/
	/opt/graphics/OpenGL/lib/pa20_64)
	endif()
	elseif(CMAKE_SYSTEM_NAME STREQUAL Haiku)
	set(_OPENGL_LIB_PATH
	/boot/develop/lib/x86)
	set(_OPENGL_INCLUDE_PATH
	/boot/develop/headers/os/opengl)
	endif()

	# The first line below is to make sure that the proper headers
	# are used on a Linux machine with the NVidia drivers installed.
	# They replace Mesa with NVidia's own library but normally do not
	# install headers and that causes the linking to
	# fail since the compiler finds the Mesa headers but NVidia's library.
	# Make sure the NVIDIA directory comes BEFORE the others.
	# - Atanas Georgiev <[email protected]>

	find_path(OPENGL_INCLUDE_DIR GL/gl.h
	/usr/share/doc/NVIDIA_GLX-1.0/include
	/usr/openwin/share/include
	/opt/graphics/OpenGL/include /usr/X11R6/include
	${_OPENGL_INCLUDE_PATH}
	)
	list(APPEND _OpenGL_REQUIRED_VARS OPENGL_INCLUDE_DIR)

	find_path(OPENGL_xmesa_INCLUDE_DIR GL/xmesa.h
	/usr/share/doc/NVIDIA_GLX-1.0/include
	/usr/openwin/share/include
	/opt/graphics/OpenGL/include /usr/X11R6/include
	)

	find_library(OPENGL_gl_LIBRARY
	NAMES GL MesaGL
	PATHS /opt/graphics/OpenGL/lib
	/usr/openwin/lib
	/usr/shlib /usr/X11R6/lib
	${_OPENGL_LIB_PATH}
	)

	unset(_OPENGL_INCLUDE_PATH)
	unset(_OPENGL_LIB_PATH)

	find_library(OPENGL_glu_LIBRARY
	NAMES GLU MesaGLU
	PATHS ${OPENGL_gl_LIBRARY}
	/opt/graphics/OpenGL/lib
	/usr/openwin/lib
	/usr/shlib /usr/X11R6/lib
	)

	endif ()

	if(OPENGL_gl_LIBRARY)

	if(OPENGL_xmesa_INCLUDE_DIR)
	set( OPENGL_XMESA_FOUND "YES" )
	else()
	set( OPENGL_XMESA_FOUND "NO" )
	endif()

	set( OPENGL_LIBRARIES ${OPENGL_gl_LIBRARY} ${OPENGL_LIBRARIES})
	if(OPENGL_glu_LIBRARY)
	set( OPENGL_GLU_FOUND "YES" )
	if(NOT "${OPENGL_glu_LIBRARY}" STREQUAL "${OPENGL_gl_LIBRARY}")
	set( OPENGL_LIBRARIES ${OPENGL_glu_LIBRARY} ${OPENGL_LIBRARIES} )
	endif()
	else()
	set( OPENGL_GLU_FOUND "NO" )
	endif()

	# This deprecated setting is for backward compatibility with CMake1.4
	set (OPENGL_LIBRARY ${OPENGL_LIBRARIES})

	endif()

	# This deprecated setting is for backward compatibility with CMake1.4
	set(OPENGL_INCLUDE_PATH ${OPENGL_INCLUDE_DIR})

	include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
	FIND_PACKAGE_HANDLE_STANDARD_ARGS(OpenGL REQUIRED_VARS ${_OpenGL_REQUIRED_VARS})
	unset(_OpenGL_REQUIRED_VARS)

	# OpenGL:: targets
	if(OPENGL_FOUND)
	if(NOT TARGET OpenGL::GL)
	if(IS_ABSOLUTE "${OPENGL_gl_LIBRARY}")
	add_library(OpenGL::GL UNKNOWN IMPORTED)
	if(OPENGL_gl_LIBRARY MATCHES "/([^/]+)\\.framework$")
	set(_gl_fw "${OPENGL_gl_LIBRARY}/${CMAKE_MATCH_1}")
	if(EXISTS "${_gl_fw}.tbd")
	set(_gl_fw "${_gl_fw}.tbd")
	endif()
	set_target_properties(OpenGL::GL PROPERTIES
	IMPORTED_LOCATION "${_gl_fw}")
	else()
	set_target_properties(OpenGL::GL PROPERTIES
	IMPORTED_LOCATION "${OPENGL_gl_LIBRARY}")
	endif()
	else()
	add_library(OpenGL::GL INTERFACE IMPORTED)
	set_target_properties(OpenGL::GL PROPERTIES
	IMPORTED_LIBNAME "${OPENGL_gl_LIBRARY}")
	endif()
	set_target_properties(OpenGL::GL PROPERTIES
	INTERFACE_INCLUDE_DIRECTORIES "${OPENGL_INCLUDE_DIR}")
	endif()

	if(OPENGL_GLU_FOUND AND NOT TARGET OpenGL::GLU)
	if(IS_ABSOLUTE "${OPENGL_glu_LIBRARY}")
	add_library(OpenGL::GLU UNKNOWN IMPORTED)
	if(OPENGL_glu_LIBRARY MATCHES "/([^/]+)\\.framework$")
	set(_glu_fw "${OPENGL_glu_LIBRARY}/${CMAKE_MATCH_1}")
	if(EXISTS "${_glu_fw}.tbd")
	set(_glu_fw "${_glu_fw}.tbd")
	endif()
	set_target_properties(OpenGL::GLU PROPERTIES
	IMPORTED_LOCATION "${_glu_fw}")
	else()
	set_target_properties(OpenGL::GLU PROPERTIES
	IMPORTED_LOCATION "${OPENGL_glu_LIBRARY}")
	endif()
	else()
	add_library(OpenGL::GLU INTERFACE IMPORTED)
	set_target_properties(OpenGL::GLU PROPERTIES
	IMPORTED_LIBNAME "${OPENGL_glu_LIBRARY}")
	endif()
	set_target_properties(OpenGL::GLU PROPERTIES
	INTERFACE_LINK_LIBRARIES OpenGL::GL)
	endif()
	endif()

	mark_as_advanced(
	OPENGL_INCLUDE_DIR
	OPENGL_xmesa_INCLUDE_DIR
	OPENGL_glu_LIBRARY
	OPENGL_gl_LIBRARY
	)