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extern/cmake/2.85/share/cmake-2.8/Modules/FindOpenGL.cmake

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+# - Try to find OpenGL
+# Once done this will define
+#  
+#  OPENGL_FOUND        - system has OpenGL
+#  OPENGL_XMESA_FOUND  - system has XMESA
+#  OPENGL_GLU_FOUND    - system has GLU
+#  OPENGL_INCLUDE_DIR  - the GL include directory
+#  OPENGL_LIBRARIES    - Link these to use OpenGL and GLU
+#   
+# If you want to use just GL you can use these values
+#  OPENGL_gl_LIBRARY   - Path to OpenGL Library
+#  OPENGL_glu_LIBRARY  - Path to GLU Library
+#  
+# 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
+
+#=============================================================================
+# Copyright 2001-2009 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.)
+
+IF (WIN32)
+  IF (CYGWIN)
+
+    FIND_PATH(OPENGL_INCLUDE_DIR GL/gl.h )
+
+    FIND_LIBRARY(OPENGL_gl_LIBRARY opengl32 )
+
+    FIND_LIBRARY(OPENGL_glu_LIBRARY glu32 )
+
+  ELSE (CYGWIN)
+
+    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(BORLAND)
+      SET (OPENGL_gl_LIBRARY opengl32 CACHE STRING "OpenGL library for win32")
+      SET (OPENGL_glu_LIBRARY glu32 CACHE STRING "GLU library for win32")
+    ENDIF(BORLAND)
+
+  ENDIF (CYGWIN)
+
+ELSE (WIN32)
+
+  IF (APPLE)
+
+    FIND_LIBRARY(OPENGL_gl_LIBRARY OpenGL DOC "OpenGL lib for OSX")
+    FIND_LIBRARY(OPENGL_glu_LIBRARY AGL DOC "AGL lib for OSX")
+    FIND_PATH(OPENGL_INCLUDE_DIR OpenGL/gl.h DOC "Include for OpenGL on OSX")
+
+  ELSE(APPLE)
+    # 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(HPUX_IA_OPENGL_LIB_PATH /opt/graphics/OpenGL/lib/hpux32/)
+    ELSE(CMAKE_SIZEOF_VOID_P EQUAL 4)
+      SET(HPUX_IA_OPENGL_LIB_PATH 
+        /opt/graphics/OpenGL/lib/hpux64/
+        /opt/graphics/OpenGL/lib/pa20_64)
+    ENDIF(CMAKE_SIZEOF_VOID_P EQUAL 4)
+
+    # 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 <atanas@cs.columbia.edu>
+
+    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
+    )
+
+    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
+            ${HPUX_IA_OPENGL_LIB_PATH}
+    )
+
+    # On Unix OpenGL most certainly always requires X11.
+    # Feel free to tighten up these conditions if you don't 
+    # think this is always true.
+    # It's not true on OSX.
+
+    IF (OPENGL_gl_LIBRARY)
+      IF(NOT X11_FOUND)
+        INCLUDE(FindX11)
+      ENDIF(NOT X11_FOUND)
+      IF (X11_FOUND)
+        IF (NOT APPLE)
+          SET (OPENGL_LIBRARIES ${X11_LIBRARIES})
+        ENDIF (NOT APPLE)
+      ENDIF (X11_FOUND)
+    ENDIF (OPENGL_gl_LIBRARY)
+
+    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(APPLE)
+ENDIF (WIN32)
+
+IF(OPENGL_gl_LIBRARY)
+
+    IF(OPENGL_xmesa_INCLUDE_DIR)
+      SET( OPENGL_XMESA_FOUND "YES" )
+    ELSE(OPENGL_xmesa_INCLUDE_DIR)
+      SET( OPENGL_XMESA_FOUND "NO" )
+    ENDIF(OPENGL_xmesa_INCLUDE_DIR)
+
+    SET( OPENGL_LIBRARIES  ${OPENGL_gl_LIBRARY} ${OPENGL_LIBRARIES})
+    IF(OPENGL_glu_LIBRARY)
+      SET( OPENGL_GLU_FOUND "YES" )
+      SET( OPENGL_LIBRARIES ${OPENGL_glu_LIBRARY} ${OPENGL_LIBRARIES} )
+    ELSE(OPENGL_glu_LIBRARY)
+      SET( OPENGL_GLU_FOUND "NO" )
+    ENDIF(OPENGL_glu_LIBRARY)
+
+    # This deprecated setting is for backward compatibility with CMake1.4
+    SET (OPENGL_LIBRARY ${OPENGL_LIBRARIES})
+
+ENDIF(OPENGL_gl_LIBRARY)
+
+# This deprecated setting is for backward compatibility with CMake1.4
+SET(OPENGL_INCLUDE_PATH ${OPENGL_INCLUDE_DIR})
+
+# handle the QUIETLY and REQUIRED arguments and set OPENGL_FOUND to TRUE if
+# all listed variables are TRUE
+INCLUDE(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(OpenGL DEFAULT_MSG OPENGL_gl_LIBRARY)
+
+MARK_AS_ADVANCED(
+  OPENGL_INCLUDE_DIR
+  OPENGL_xmesa_INCLUDE_DIR
+  OPENGL_glu_LIBRARY
+  OPENGL_gl_LIBRARY
+)