+ # Check to see if the xcb-glx library is new enough to support
+ # GLX_ARB_create_context. This bit of hackery is necessary until XCB 1.8
+ # is released.
+ save_CPPFLAGS="$CPPFLAGS"
+ save_LDFLAGS="$LDFLAGS"
+ CPPFLAGS="$CPPFLAGS $X11_INCLUDES"
+ LDFLAGS="$LDFLAGS $GL_LIB_DEPS"
+ AC_CHECK_LIB(xcb-glx, xcb_glx_create_context_attribs_arb_checked,
+ [HAVE_XCB_GLX_CREATE_CONTEXT=yes],
+ [HAVE_XCB_GLX_CREATE_CONTEXT=no])
+ CPPFLAGS="$save_CPPFLAGS"
+ LDFLAGS="$save_LDFLAGS"
+
+ if test x$HAVE_XCB_GLX_CREATE_CONTEXT = xyes; then
+ X11_INCLUDES="$X11_INCLUDES -DHAVE_XCB_GLX_CREATE_CONTEXT"
+ fi
+