cmake_modules/FindOpenGL.cmake
author Wuzzy <Wuzzy2@mail.ru>
Thu, 25 Oct 2018 18:54:24 +0200
changeset 13970 f791c46b47a4
parent 11658 f87ed83568c8
permissions -rw-r--r--
Remove double space at end of chat messages from server
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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#.rst:
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# FindOpenGL
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# ----------
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#
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# FindModule for OpenGL and GLU.
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#
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# Result Variables
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# ^^^^^^^^^^^^^^^^
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#
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# This module sets the following variables:
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#
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# ``OPENGL_FOUND``
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#  True, if the system has OpenGL.
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# ``OPENGL_XMESA_FOUND``
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#  True, if the system has XMESA.
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# ``OPENGL_GLU_FOUND``
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#  True, if the system has GLU.
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# ``OPENGL_INCLUDE_DIR``
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#  Path to the OpenGL include directory.
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# ``OPENGL_LIBRARIES``
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#  Paths to the OpenGL and GLU libraries.
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#
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# If you want to use just GL you can use these values:
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#
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# ``OPENGL_gl_LIBRARY``
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#  Path to the OpenGL library.
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# ``OPENGL_glu_LIBRARY``
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#  Path to the GLU library.
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#
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# OSX Specific
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# ^^^^^^^^^^^^
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#
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# On OSX default to using the framework version of OpenGL. People will
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# have to change the cache values of OPENGL_glu_LIBRARY and
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# OPENGL_gl_LIBRARY to use OpenGL with X11 on OSX.
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#=============================================================================
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# Copyright 2001-2009 Kitware, Inc.
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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#  License text for the above reference.)
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set(_OpenGL_REQUIRED_VARS OPENGL_gl_LIBRARY)
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if (CYGWIN)
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  find_path(OPENGL_INCLUDE_DIR GL/gl.h )
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  list(APPEND _OpenGL_REQUIRED_VARS OPENGL_INCLUDE_DIR)
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  find_library(OPENGL_gl_LIBRARY opengl32 )
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  find_library(OPENGL_glu_LIBRARY glu32 )
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elseif (WIN32)
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  if(BORLAND)
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    set (OPENGL_gl_LIBRARY import32 CACHE STRING "OpenGL library for win32")
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    set (OPENGL_glu_LIBRARY import32 CACHE STRING "GLU library for win32")
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  else()
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    set (OPENGL_gl_LIBRARY opengl32 CACHE STRING "OpenGL library for win32")
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    set (OPENGL_glu_LIBRARY glu32 CACHE STRING "GLU library for win32")
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  endif()
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elseif (APPLE)
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  # The OpenGL.framework provides both gl and glu
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  find_library(OPENGL_gl_LIBRARY OpenGL DOC "OpenGL library for OS X")
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  find_library(OPENGL_glu_LIBRARY OpenGL DOC
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    "GLU library for OS X (usually same as OpenGL library)")
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  find_path(OPENGL_INCLUDE_DIR OpenGL/gl.h DOC "Include for OpenGL on OS X")
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  list(APPEND _OpenGL_REQUIRED_VARS OPENGL_INCLUDE_DIR)
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else()
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  if (CMAKE_SYSTEM_NAME MATCHES "HP-UX")
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    # Handle HP-UX cases where we only want to find OpenGL in either hpux64
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    # or hpux32 depending on if we're doing a 64 bit build.
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    if(CMAKE_SIZEOF_VOID_P EQUAL 4)
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      set(_OPENGL_LIB_PATH
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        /opt/graphics/OpenGL/lib/hpux32/)
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    else()
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      set(_OPENGL_LIB_PATH
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        /opt/graphics/OpenGL/lib/hpux64/
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        /opt/graphics/OpenGL/lib/pa20_64)
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    endif()
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  elseif(CMAKE_SYSTEM_NAME STREQUAL Haiku)
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    set(_OPENGL_LIB_PATH
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      /boot/develop/lib/x86)
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    set(_OPENGL_INCLUDE_PATH
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      /boot/develop/headers/os/opengl)
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  endif()
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  # The first line below is to make sure that the proper headers
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  # are used on a Linux machine with the NVidia drivers installed.
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  # They replace Mesa with NVidia's own library but normally do not
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  # install headers and that causes the linking to
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  # fail since the compiler finds the Mesa headers but NVidia's library.
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  # Make sure the NVIDIA directory comes BEFORE the others.
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  #  - Atanas Georgiev <atanas@cs.columbia.edu>
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  find_path(OPENGL_INCLUDE_DIR GL/gl.h
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    /usr/share/doc/NVIDIA_GLX-1.0/include
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    /usr/openwin/share/include
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    /opt/graphics/OpenGL/include /usr/X11R6/include
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    ${_OPENGL_INCLUDE_PATH}
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  )
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  list(APPEND _OpenGL_REQUIRED_VARS OPENGL_INCLUDE_DIR)
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  find_path(OPENGL_xmesa_INCLUDE_DIR GL/xmesa.h
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    /usr/share/doc/NVIDIA_GLX-1.0/include
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    /usr/openwin/share/include
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    /opt/graphics/OpenGL/include /usr/X11R6/include
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  )
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  find_library(OPENGL_gl_LIBRARY
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    NAMES GL MesaGL
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    PATHS /opt/graphics/OpenGL/lib
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          /usr/openwin/lib
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          /usr/shlib /usr/X11R6/lib
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          ${_OPENGL_LIB_PATH}
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  )
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  unset(_OPENGL_INCLUDE_PATH)
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  unset(_OPENGL_LIB_PATH)
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  find_library(OPENGL_glu_LIBRARY
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    NAMES GLU MesaGLU
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    PATHS ${OPENGL_gl_LIBRARY}
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          /opt/graphics/OpenGL/lib
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          /usr/openwin/lib
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          /usr/shlib /usr/X11R6/lib
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  )
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endif ()
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if(OPENGL_gl_LIBRARY)
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    if(OPENGL_xmesa_INCLUDE_DIR)
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      set( OPENGL_XMESA_FOUND "YES" )
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    else()
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      set( OPENGL_XMESA_FOUND "NO" )
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    endif()
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    set( OPENGL_LIBRARIES  ${OPENGL_gl_LIBRARY} ${OPENGL_LIBRARIES})
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    if(OPENGL_glu_LIBRARY)
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      set( OPENGL_GLU_FOUND "YES" )
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      if(NOT "${OPENGL_glu_LIBRARY}" STREQUAL "${OPENGL_gl_LIBRARY}")
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        set( OPENGL_LIBRARIES ${OPENGL_glu_LIBRARY} ${OPENGL_LIBRARIES} )
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      endif()
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    else()
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      set( OPENGL_GLU_FOUND "NO" )
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    endif()
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    # This deprecated setting is for backward compatibility with CMake1.4
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    set (OPENGL_LIBRARY ${OPENGL_LIBRARIES})
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endif()
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# This deprecated setting is for backward compatibility with CMake1.4
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set(OPENGL_INCLUDE_PATH ${OPENGL_INCLUDE_DIR})
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if(BUILD_ENGINE_JS)
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    # The implementation is based on the standard FindOpenGL.cmake provided
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    # with CMake, but customized for targeting Emscripten only.
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    # These libraries are provided with Emscripten
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    SET(OPENGL_FOUND TRUE)
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    SET(OPENGL_GLU_FOUND TRUE)
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    # Doesn't look like this one is part of Emscripten
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    SET(OPENGL_XMESA_FOUND FALSE)
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    # This is the path where <GL/gl.h> is found
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    SET(OPENGL_INCLUDE_DIR "${EMSCRIPTEN_ROOT_PATH}/system/include")
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    # No library to link against for OpenGL, since Emscripten picks it up
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    # automatically from library_gl.js, but need to report something, or
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    # CMake thinks we failed in the search.
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    SET(OPENGL_LIBRARIES "opengl_emscripten_internal")
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    SET(OPENGL_gl_LIBRARY "gl_emscripten_internal")
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    SET(OPENGL_glu_LIBRARY "glu_emscripten_internal")
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    mark_as_advanced(
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      OPENGL_INCLUDE_DIR
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      OPENGL_glu_LIBRARY
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      OPENGL_gl_LIBRARY
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    )
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endif()
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# handle the QUIETLY and REQUIRED arguments and set OPENGL_FOUND to TRUE if
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# all listed variables are TRUE
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INCLUDE(FindPackageHandleStandardArgs)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(OpenGL REQUIRED_VARS ${_OpenGL_REQUIRED_VARS})
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unset(_OpenGL_REQUIRED_VARS)
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mark_as_advanced(
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  OPENGL_INCLUDE_DIR
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  OPENGL_xmesa_INCLUDE_DIR
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  OPENGL_glu_LIBRARY
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  OPENGL_gl_LIBRARY
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)