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diff --git a/sysdeps/unix/sysv/linux/bits/sigset.h b/sysdeps/unix/sysv/linux/bits/sigset.h
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+/* __sig_atomic_t, __sigset_t, and related definitions. Linux version.
+ Copyright (C) 1991, 1992, 1994, 1996, 1997 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library 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.
+
+ The GNU C Library 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 the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#ifndef _SIGSET_H_types
+#define _SIGSET_H_types 1
+
+typedef int __sig_atomic_t;
+
+/* A `sigset_t' has a bit for each signal. */
+
+#define _SIGSET_NWORDS (1024 / (8 * sizeof (unsigned long int)))
+typedef struct
+ {
+ unsigned long int __val[_SIGSET_NWORDS];
+ } __sigset_t;
+
+#endif
+
+
+/* We only want to define these functions if <signal.h> was actually
+ included; otherwise we were included just to define the types. Since we
+ are namespace-clean, it wouldn't hurt to define extra macros. But
+ trouble can be caused by functions being defined (e.g., any global
+ register vars declared later will cause compilation errors). */
+
+#if !defined (_SIGSET_H_fns) && defined (_SIGNAL_H)
+#define _SIGSET_H_fns 1
+
+#ifndef _EXTERN_INLINE
+#define _EXTERN_INLINE extern __inline
+#endif
+
+/* Return a mask that includes the bit for SIG only. */
+#define __sigmask(sig) \
+ (((unsigned long) 1) << (((sig) - 1) % (8 * sizeof (unsigned long int))))
+
+/* Return the word index for SIG. */
+#define __sigword(sig) (((sig) - 1) / (8 * sizeof (unsigned long int)))
+
+#if defined __GNUC__ && __GNUC__ >= 2
+# define __sigemptyset(set) \
+ (__extension__ ({ int __cnt = _SIGSET_NWORDS; \
+ sigset_t *__set = (set); \
+ while (--__cnt >= 0) __set->__val[__cnt] = 0; \
+ 0; }))
+# define __sigfillset(set) \
+ (__extension__ ({ int __cnt = _SIGSET_NWORDS; \
+ sigset_t *__set = (set); \
+ while (--__cnt >= 0) __set->__val[__cnt] = ~0UL; \
+ 0; }))
+
+# ifdef _GNU_SOURCE
+/* The POSIX does not specify for handling the whole signal set in one
+ command. This is often wanted and so we define three more functions
+ here. */
+# define __sigisemptyset(set) \
+ (__extension__ ({ int __cnt = _SIGSET_NWORDS; \
+ const sigset_t *__set = (set); \
+ int __ret = __set->__val[--__cnt]; \
+ while (!__ret && --__cnt >= 0) \
+ __ret = __set->__val[__cnt]; \
+ __ret == 0; }))
+# define __sigandset(dest, left, right) \
+ (__extension__ ({ int __cnt = _SIGSET_NWORDS; \
+ sigset_t *__dest = (dest); \
+ const sigset_t *__left = (left); \
+ const sigset_t *__right = (right); \
+ while (--__cnt >= 0) \
+ __dest->__val[__cnt] = (__left->__val[__cnt] \
+ & __right->__val[__cnt]); \
+ 0; }))
+# define __sigorset(dest, left, right) \
+ (__extension__ ({ int __cnt = _SIGSET_NWORDS; \
+ sigset_t *__dest = (dest); \
+ const sigset_t *__left = (left); \
+ const sigset_t *__right = (right); \
+ while (--__cnt >= 0) \
+ __dest->__val[__cnt] = (__left->__val[__cnt] \
+ | __right->__val[__cnt]); \
+ 0; }))
+# endif
+#endif
+
+/* These functions needn't check for a bogus signal number -- error
+ checking is done in the non __ versions. */
+
+extern int __sigismember (__const __sigset_t *, int);
+extern int __sigaddset (__sigset_t *, int);
+extern int __sigdelset (__sigset_t *, int);
+
+#define __SIGSETFN(NAME, BODY, CONST) \
+ _EXTERN_INLINE int \
+ NAME (CONST __sigset_t *__set, int __sig) \
+ { \
+ unsigned long int __mask = __sigmask (__sig); \
+ unsigned long int __word = __sigword (__sig); \
+ return BODY; \
+ }
+
+__SIGSETFN (__sigismember, (__set->__val[__word] & __mask) ? 1 : 0, __const)
+__SIGSETFN (__sigaddset, ((__set->__val[__word] |= __mask), 0), )
+__SIGSETFN (__sigdelset, ((__set->__val[__word] &= ~__mask), 0), )
+
+#undef __SIGSETFN
+
+
+#endif /* ! _SIGSET_H_fns. */