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In file included from /wrkdirs/usr/ports/x11/virtualgl/work/VirtualGL-2.6.3/server/glxvisual.h:18:
/wrkdirs/usr/ports/x11/virtualgl/work/VirtualGL-2.6.3/server/faker-sym.h:538:1: error: comparison of distinct pointer types ('_glXGetTransparentIndexSUNType' (aka 'int (*)(_XDisplay *, unsigned long, unsigned long, long *)') and 'int (*)(Display *, Window, Window, unsigned long *)' (aka 'int (*)(_XDisplay *, unsigned long, unsigned long, unsigned long *)'))
FUNCDEF4(int, glXGetTransparentIndexSUN, Display *, dpy, Window, overlay,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/wrkdirs/usr/ports/x11/virtualgl/work/VirtualGL-2.6.3/server/faker-sym.h:183:3: note: expanded from macro 'FUNCDEF4'

CHECKSYM(f, fake_f); \
^~~~~~~~~~~~~~~~~~~

/wrkdirs/usr/ports/x11/virtualgl/work/VirtualGL-2.6.3/server/faker-sym.h:59:11: note: expanded from macro 'CHECKSYM'

if(__##s == fake_s) \
   ~~~~~ ^  ~~~~~~

Reported by: pkg-fallout