Remove __need macros from signal.h.

The types affected are __sig_atomic_t, sig_atomic_t, __sigset_t,
sigset_t, sigval_t, sigevent_t, and siginfo_t. __sig_atomic_t is a
scalar, so it's now directly available from bits/types.h.  The others
get bits/types/ headers.

Side effects include: There have been small changes to which
non-signal headers expose which subset of the signal-related types.
A couple of architectures' nested siginfo_t fields had to be renamed
to prevent undesired macro expansion.  Internal code that wants to
manipulate signal masks must now include <sigsetops.h> (which is not
installed) and should be aware that __sigaddset, __sigandset,
__sigdelset, __sigemptyset, and __sigorset no longer return a value
(unlike the public API).  Relatedly, the public signal.h no longer
declares any of those functions.  The obsolete sigmask() macro no
longer has a system-specific definition -- in the cases where it
matters, it didn't work anyway.

New Linux architectures should create bits/siginfo-arch.h and/or
bits/siginfo-consts-arch.h to customize their siginfo_t, rather than
duplicating everything in bits/siginfo.h (which no longer exists).
Add new __SI_* macros if necessary.  Ports to other operating systems
are strongly encouraged to generalize this scheme further.

	* bits/sigevent-consts.h
	* bits/siginfo-consts.h
	* bits/types/__sigset_t.h
	* bits/types/sigevent_t.h
	* bits/types/siginfo_t.h
	* sysdeps/unix/sysv/linux/bits/sigevent-consts.h
	* sysdeps/unix/sysv/linux/bits/siginfo-consts.h
	* sysdeps/unix/sysv/linux/bits/types/__sigset_t.h
	* sysdeps/unix/sysv/linux/bits/types/sigevent_t.h
	* sysdeps/unix/sysv/linux/bits/types/siginfo_t.h:
	New system-dependent bits headers.

	* sysdeps/unix/sysv/linux/bits/siginfo-arch.h
	* sysdeps/unix/sysv/linux/bits/siginfo-consts-arch.h
	* sysdeps/unix/sysv/linux/ia64/bits/siginfo-arch.h
	* sysdeps/unix/sysv/linux/ia64/bits/siginfo-consts-arch.h
	* sysdeps/unix/sysv/linux/mips/bits/siginfo-arch.h
	* sysdeps/unix/sysv/linux/sparc/bits/siginfo-arch.h
	* sysdeps/unix/sysv/linux/tile/bits/siginfo-arch.h
	* sysdeps/unix/sysv/linux/tile/bits/siginfo-consts-arch.h
	* sysdeps/unix/sysv/linux/x86/bits/siginfo-arch.h:
	New Linux-only system-dependent bits headers.

	* signal/bits/types/sig_atomic_t.h
	* signal/bits/types/sigset_t.h
	* signal/bits/types/sigval_t.h:
	New non-system-dependent bits headers.

	* sysdeps/generic/sigsetops.h
	* sysdeps/unix/sysv/linux/sigsetops.h:
	New internal headers.

	* include/bits/types/sig_atomic_t.h
	* include/bits/types/sigset_t.h
	* include/bits/types/sigval_t.h:
	New wrappers.

	* signal/sigsetops.h
	* bits/siginfo.h
	* bits/sigset.h
	* sysdeps/unix/sysv/linux/bits/siginfo.h
	* sysdeps/unix/sysv/linux/bits/sigset.h
	* sysdeps/unix/sysv/linux/ia64/bits/siginfo.h
	* sysdeps/unix/sysv/linux/mips/bits/siginfo.h
	* sysdeps/unix/sysv/linux/s390/bits/siginfo.h
	* sysdeps/unix/sysv/linux/sparc/bits/siginfo.h
	* sysdeps/unix/sysv/linux/tile/bits/siginfo.h
	* sysdeps/unix/sysv/linux/x86/bits/siginfo.h:
	Deleted.

	* signal/Makefile, sysdeps/unix/sysv/linux/Makefile:
	Update lists of installed headers.

	* posix/bits/types.h: Define __sig_atomic_t here.
	* signal/signal.h: Use the new bits headers; no need to handle
	__need_sig_atomic_t nor __need_sigset_t.  Don't use __sigmask
	to define sigmask.
	* include/signal.h: No need to handle __need_sig_atomic_t
	nor __need_sigset_t.  Don't define __sigemptyset.

	* io/sys/poll.h, setjmp/setjmp.h
	* sysdeps/arm/sys/ucontext.h, sysdeps/generic/sys/ucontext.h
	* sysdeps/i386/sys/ucontext.h, sysdeps/m68k/sys/ucontext.h
	* sysdeps/mach/hurd/i386/bits/sigcontext.h
	* sysdeps/mips/sys/ucontext.h, sysdeps/powerpc/novmxsetjmp.h
	* sysdeps/pthread/bits/sigthread.h
	* sysdeps/unix/sysv/linux/hppa/sys/ucontext.h
	* sysdeps/unix/sysv/linux/m68k/sys/ucontext.h
	* sysdeps/unix/sysv/linux/mips/sys/ucontext.h
	* sysdeps/unix/sysv/linux/nios2/sys/ucontext.h
	* sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h
	* sysdeps/unix/sysv/linux/s390/sys/ucontext.h
	* sysdeps/unix/sysv/linux/sh/sys/ucontext.h
	* sysdeps/unix/sysv/linux/sparc/sys/ucontext.h
	* sysdeps/unix/sysv/linux/tile/sys/ucontext.h
	* sysdeps/unix/sysv/linux/x86/sys/ucontext.h:
	Use bits/types/__sigset_t.h.

	* misc/sys/select.h, posix/spawn.h
	* sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h
	* sysdeps/unix/sysv/linux/sys/epoll.h
	* sysdeps/unix/sysv/linux/sys/signalfd.h:
	Use bits/types/sigset_t.h.

	* resolv/netdb.h, rt/mqueue.h: Use bits/types/sigevent_t.h.
	* rt/aio.h: Use bits/types/sigevent_t.h and bits/sigevent-consts.h.
	* socket/sys/socket.h: Don't include bits/sigset.h.

	* login/utmp_file.c, shadow/lckpwdf.c, signal/sigandset.c
	* signal/sigisempty.c, stdlib/abort.c, sysdeps/posix/profil.c
	* sysdeps/posix/sigignore.c, sysdeps/posix/sigintr.c
	* sysdeps/posix/signal.c, sysdeps/posix/sigset.c
	* sysdeps/posix/sprofil.c, sysdeps/posix/sysv_signal.c
	* sysdeps/unix/sysv/linux/nptl-signals.h:
	Include sigsetops.h.

	* signal/sigaddset.c, signal/sigandset.c, signal/sigdelset.c
	* signal/sigorset.c, stdlib/abort.c, sysdeps/posix/sigignore.c
	* sysdeps/posix/signal.c, sysdeps/posix/sigset.c:
	__sigaddset, __sigandset, __sigdelset, __sigemptyset, __sigorset
	now return no value.

	* signal/sigaddset.c, signal/sigdelset.c, signal/sigismem.c
	Include <errno.h>, <signal.h>, and <sigsetops.h> instead of
	"sigsetops.h".

	* signal/sigsetops.c: Explicitly define __sigismember,
	__sigaddset, and __sigdelset as compatibility symbols.

	* signal/Versions: Correct commentary on __sigpause,
	__sigaddset, __sigdelset, __sigismember.

	* inet/rcmd.c: Include sigsetops.h.  Convert old code using
	__sigblock/__sigsetmask to use __sigprocmask and friends.

1 files changed, 0 insertions, 124 deletions

diff --git a/sysdeps/unix/sysv/linux/bits/sigset.h b/sysdeps/unix/sysv/linux/bits/sigset.h
deleted file mode 100644
index 4b2916f3d9..0000000000
--- a/sysdeps/unix/sysv/linux/bits/sigset.h
+++ /dev/null
@@ -1,124 +0,0 @@
-/* __sig_atomic_t, __sigset_t, and related definitions.  Linux version.
-   Copyright (C) 1991-2017 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 Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 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
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#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 int) 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 __USE_GNU
-/* 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);
-
-# ifdef __USE_EXTERN_INLINES
-#  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
-
-
-#endif /* ! _SIGSET_H_fns.  */