sigaddset          55 gnulib-tests/test-sigprocmask.c   sigaddset (&set, SIGINT);
sigaddset         115 lib/sigaction.c     sigaddset (&mask, sig);
sigaddset         766 src/sdiff.c        sigaddset (&catchaction.sa_mask, sigs[i]);
sigaddset        1186 src/sdiff.c      sigaddset (&blocked, SIGINT);