ENH: make all OpenGL libs advanced, and add support for glu lib with Borland

Modules/FindGLU.cmake

@@ -7,7 +7,11 @@
 #
 
 IF (WIN32)
+  IF(BORLAND)
+    SET (GLU_LIBRARY import32 CACHE STRING "GLU library for win32")
+  ELSE(BORLAND)
     SET (GLU_LIBRARY glu32 CACHE STRING "GLU library for win32")
+  ENDIF(BORLAND)
 ELSE (WIN32)
   FIND_PATH(GLU_INCLUDE_PATH GL/gl.h 
   /usr/include 
@@ -16,6 +20,9 @@ ELSE (WIN32)
   /opt/graphics/OpenGL/include 
   /usr/X11R6/include 
   )
+  MARK_AS_ADVANCED(
+    GLU_INCLUDE_PATH
+  )
 
   FIND_LIBRARY(GLU_LIBRARY GLU
   /usr/lib 
@@ -26,3 +33,7 @@ ELSE (WIN32)
   )
 
 ENDIF (WIN32)
+
+MARK_AS_ADVANCED(
+  GLU_LIBRARY
+)

Modules/FindGLUT.cmake

@@ -18,6 +18,9 @@ ELSE (WIN32)
   /opt/graphics/OpenGL/include 
   /usr/X11R6/include 
   )
+  MARK_AS_ADVANCED(
+    GLUT_INCLUDE_PATH
+  )
 
   FIND_LIBRARY(GLUT_LIBRARY glut
   /usr/lib 
@@ -28,3 +31,7 @@ ELSE (WIN32)
   )
 
 ENDIF (WIN32)
+
+MARK_AS_ADVANCED(
+  GLUT_LIBRARY
+)

Modules/FindOpenGL.cmake

@@ -23,6 +23,9 @@ ELSE (WIN32)
      /opt/graphics/OpenGL/include 
      /usr/X11R6/include 
      )
+     MARK_AS_ADVANCED(
+       OPENGL_INCLUDE_PATH
+     )
 
      FIND_LIBRARY(OPENGL_LIBRARY GL
      /usr/lib 
@@ -33,3 +36,7 @@ ELSE (WIN32)
      )
    ENDIF (APPLE)
 ENDIF (WIN32)
+
+MARK_AS_ADVANCED(
+  OPENGL_LIBRARY
+)