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diff --git a/gnu/usr.bin/gdb/libiberty/sigsetmask.c b/gnu/usr.bin/gdb/libiberty/sigsetmask.c
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+/* Version of sigsetmask.c
+ Copyright 1991, 1992 Free Software Foundation, Inc.
+ Written by Steve Chamberlain (sac@cygnus.com).
+ Contributed by Cygnus Support.
+
+This file is part of the libiberty library.
+Libiberty is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+Libiberty is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with libiberty; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+/* Set the current signal mask to the set provided, and return the
+ previous value */
+
+#define _POSIX_SOURCE
+#include <ansidecl.h>
+#include <signal.h>
+
+#ifdef SIG_SETMASK
+int
+DEFUN(sigsetmask,(set),
+ int set)
+{
+ sigset_t new;
+ sigset_t old;
+
+ sigemptyset (&new);
+ if (set != 0) {
+ abort(); /* FIXME, we don't know how to translate old mask to new */
+ }
+ sigprocmask(SIG_SETMASK, &new, &old);
+ return 1; /* FIXME, we always return 1 as old value. */
+}
+#endif
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