GNULIB_PTHREAD_SIGMASK   61 maint/gnulib/lib/signal.in.h #if (@GNULIB_PTHREAD_SIGMASK@ || defined GNULIB_POSIXCHECK) \
GNULIB_PTHREAD_SIGMASK  129 maint/gnulib/lib/signal.in.h #if @GNULIB_PTHREAD_SIGMASK@