Check for an OpenGL implementation. If GL is found, the required compiler and linker flags are included in the output variables "GL_CFLAGS", "GL_LIBS", "GL_LDFLAGS", respectively. If no usable GL implementation is found, "no_gl" is set to "yes".
You could disable OpenGL using –with-gl=no
You could choose a specific OpenGL libs using –with-gl=lib_name
Under darwin, cygwin and mingw target you could prefer the OpenGL implementation that link with X setting –with-gl=x or without X support with –with-gl=nox. Notes that this script try to guess the right implementation.
If the header "GL/gl.h" is found, "HAVE_GL_GL_H" is defined. If the header "OpenGL/gl.h" is found, HAVE_OPENGL_GL_H is defined. These preprocessor definitions may not be mutually exclusive.
You should use something like this in your headers:
#if defined(HAVE_WINDOWS_H) && defined(_WIN32) # include <windows.h> #endif #ifdef HAVE_GL_GL_H # include <GL/gl.h> #elif defined(HAVE_OPENGL_GL_H) # include <OpenGL/gl.h> #else # error no gl.h #endif
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Copyright © 2009 Braden McDaniel email@example.com
Copyright © 2012 Bastien Roucaries firstname.lastname@example.org
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