Autoconf macros AX_CHECK_GL, AX_CHECK_GLU, and AX_CHECK_GLUT, which check for libGL, libGLU, and libglut, respectively.

These macros are designed to work in the presence or absence of X11 and to play nicely with the --with-x option added by Autoconf's AC_PATH_X macro. That is, where an OpenGL implementation that does not require X11 is available, passing --without-x to configure causes these macros to find it an set the appropriate compiler and linker flags.

They have been tested on various Linux distributions, Mac OS X, and Windows (using both the GNU and Microsoft compilers).