Search for OpenGL. We search first for Mesa (a GPL’ed version of Mesa) before a vendor’s version of OpenGL, unless we were specifically asked not to with ‘–with-Mesa=no’ or ‘–without-Mesa’.
The four "standard" OpenGL libraries are searched for: "-lGL", "-lGLU", "-lGLX" (or "-lMesaGL", "-lMesaGLU" as the case may be) and "-lglut".
All of the libraries that are found (since "-lglut" or "-lGLX" might be missing) are added to the shell output variable "GL_LIBS", along with any other libraries that are necessary to successfully link an OpenGL application (e.g. the X11 libraries). Care has been taken to make sure that all of the libraries in "GL_LIBS" are listed in the proper order.
Additionally, the shell output variable "GL_CFLAGS" is set to any flags (e.g. "-I" flags) that are necessary to successfully compile an OpenGL application.
The following shell variable (which are not output variables) are also set to either "yes" or "no" (depending on which libraries were found) to help you determine exactly what was found.
have_GL have_GLU have_GLX have_glut
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Copyright © 2008 Matthew D. Langston
Copyright © 2008 Ahmet Inan firstname.lastname@example.org
Copyright © 2013 Bastien Roucaries <email@example.com
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