set(OPENGL_gl_LIBRARY "-lopengl32" CACHE STRING "OpenGL library for Win32" FORCE)
set(OPENGL_glu_LIBRARY "-lglu32" CACHE STRING "GLU library for Win32" FORCE)
set(OPENGL_gl_LIBRARY "-lopengl32" CACHE STRING "OpenGL library for Win32" FORCE)
set(OPENGL_glu_LIBRARY "-lglu32" CACHE STRING "GLU library for Win32" FORCE)