--- /dev/null
+--- gource-0.40/m4/ax_check_glu.m4~ 2013-04-24 03:58:51.000000000 +0200
++++ gource-0.40/m4/ax_check_glu.m4 2015-06-27 12:04:05.304524114 +0200
+@@ -131,7 +131,7 @@
+ # else
+ # include <OpenGL/glu.h>
+ # endif]],
+- [[GLvoid (*func)(...); gluTessCallback(0, 0, func)]])],
++ [[GLvoid (*func)(); gluTessCallback(0, 0, func)]])],
+ [ax_cv_varargs_glu_tesscb=yes])
+ CXXFLAGS=$ax_save_CXXFLAGS
+ AC_LANG_POP([C++])])