glproto installs these includes: /usr/include/GL/glu.h /usr/include/GL/glx.h /usr/include/GL/glxint.h /usr/include/GL/glxmd.h /usr/include/GL/glxproto.h /usr/include/GL/glxtokens.h mesa installs these ones: /usr/include/GL/amesa.h /usr/include/GL/directfbgl.h /usr/include/GL/dmesa.h /usr/include/GL/foomesa.h /usr/include/GL/fxmesa.h /usr/include/GL/ggimesa.h /usr/include/GL/glfbdev.h /usr/include/GL/gl.h /usr/include/GL/gl_mangle.h /usr/include/GL/glext.h /usr/include/GL/glu.h /usr/include/GL/glu_mangle.h /usr/include/GL/glutf90.h /usr/include/GL/glut.h /usr/include/GL/glx.h /usr/include/GL/glxext.h /usr/include/GL/glx_mangle.h /usr/include/GL/mesa_wgl.h /usr/include/GL/mglmesa.h /usr/include/GL/miniglx.h /usr/include/GL/osmesa.h /usr/include/GL/svgamesa.h /usr/include/GL/uglglutshapes.h /usr/include/GL/uglmesa.h /usr/include/GL/vms_x_fix.h /usr/include/GL/wmesa.h /usr/include/GL/xmesa.h /usr/include/GL/xmesa_xf86.h /usr/include/GL/xmesa_x.h /usr/include/GLES /usr/include/GLES/egl.h /usr/include/GLES/egltypes.h I didn't spot any other overlaps.
fixed in head.
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