EX_USAGE           30 maint/gnulib/lib/argp-eexst.c error_t argp_err_exit_status = EX_USAGE;
EX_USAGE           49 maint/gnulib/lib/sysexits.in.h #if !(@HAVE_SYSEXITS_H@ && defined EX_USAGE)
EX_USAGE           33 maint/gnulib/tests/test-sysexits.c     case EX_USAGE: