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+?RCS: $Id: d_sigprocmask.U 167 2013-05-08 17:58:00Z rmanfredi $
+?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi
+?RCS: You may redistribute only under the terms of the Artistic License,
+?RCS: as specified in the README file that comes with the distribution.
+?RCS: You may reuse parts of this distribution only within the terms of
+?RCS: that same Artistic License; a copy of which may be found at the root
+?RCS: of the source tree for dist 4.0.
+?RCS: $Log: d_sigprocmask.U,v $
+?RCS: Revision 3.0 1993/08/18 12:07:04 ram
+?RCS: Baseline for dist 3.0 netwide release.
+?MAKE:d_sigprocmask: Trylink cat
+?MAKE: -pick add $@ %<
+?S: This variable conditionally defines the HAS_SIGPROCMASK symbol, which
+?S: indicates to the C program that the sigprocmask() routine is available.
+?C: This symbol, if defined, indicates that the sigprocmask() routine is
+?C: available to examine and change blocked signals.
+?H:#$d_sigprocmask HAS_SIGPROCMASK /**/
+?LINT:set d_sigprocmask
+: see if sigprocmask exists
+$cat >try.c <<EOC
+#include <signal.h>
+int main(void)
+ static int ret;
+ sigset_t oset;
+ ret |= sigprocmask(SIG_BLOCK, &oset, &oset);
+ return ret ? 0 : 1;
+set d_sigprocmask
+eval $trylink