Fix XPG4.2 bits/sigaction.h namespace (bug 21899).

For XPG4.2, sa_sigaction, SA_ONSTACK, SA_RESETHAND, SA_RESTART and
SA_NODEFER should be defined in signal.h, but they are only defined
for other standards at present.

This patch fixes the various bits/sigaction.h headers accordingly.
All the fixes are essentially the same, except those for SPARC and
Tile.

For SPARC, the header (a) spuriously defined various nonstandard
macros for __USE_UNIX98 || defined __USE_XOPEN2K8 and (b) defined some
standard macros as aliases of nonstandard ones instead of the other
way round.  This patch fixes the SPARC header to handle these macros
the same way and with the same conditions as those for other
architectures, so the standard macros are the primary ones and the
other ones are defined only for __USE_MISC and are aliases of the
standard ones where applicable.

For Tile, the header spuriously defined the nonstandard macro
SA_NOPTRACE for __USE_UNIX98 || defined __USE_XOPEN2K8; this is moved
to __USE_MISC.

(Those nonstandard macros are in a reserved namespace, but it seems
desirable to be consistent between architectures as far as possible,
and so not define them in standard modes anywhere.)

Tested for x86_64, and with build-many-glibcs.py.

	[BZ #21899]
	* bits/sigaction.h (struct sigaction): Define sa_handler and
	sa_sigaction using union also for [__USE_XOPEN_EXTENDED].
	(SA_ONSTACK): Change [__USE_UNIX98] condition to
	[__USE_XOPEN_EXTENDED].
	(SA_RESTART): Likewise.
	(SA_NODEFER): Likewise.
	(SA_RESETHAND): Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/sigaction.h
	(struct sigaction): Define sa_handler and sa_sigaction using union
	also for [__USE_XOPEN_EXTENDED].
	(SA_ONSTACK): Change [__USE_UNIX98] condition to
	[__USE_XOPEN_EXTENDED].
	(SA_RESTART): Likewise.
	(SA_NODEFER): Likewise.
	(SA_RESETHAND): Likewise.
	* sysdeps/unix/sysv/linux/bits/sigaction.h
	(struct sigaction): Define sa_handler and sa_sigaction using union
	also for [__USE_XOPEN_EXTENDED].
	(SA_ONSTACK): Change [__USE_UNIX98] condition to
	[__USE_XOPEN_EXTENDED].
	(SA_RESTART): Likewise.
	(SA_NODEFER): Likewise.
	(SA_RESETHAND): Likewise.
	* sysdeps/unix/sysv/linux/hppa/bits/sigaction.h
	(struct sigaction): Define sa_handler and sa_sigaction using union
	also for [__USE_XOPEN_EXTENDED].
	(SA_ONSTACK): Change [__USE_UNIX98] condition to
	[__USE_XOPEN_EXTENDED].
	(SA_RESTART): Likewise.
	(SA_NODEFER): Likewise.
	(SA_RESETHAND): Likewise.
	* sysdeps/unix/sysv/linux/ia64/bits/sigaction.h
	(struct sigaction): Define sa_handler and sa_sigaction using union
	also for [__USE_XOPEN_EXTENDED].
	(SA_ONSTACK): Change [__USE_UNIX98] condition to
	[__USE_XOPEN_EXTENDED].
	(SA_RESTART): Likewise.
	(SA_NODEFER): Likewise.
	(SA_RESETHAND): Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/sigaction.h
	(struct sigaction): Define sa_handler and sa_sigaction using union
	also for [__USE_XOPEN_EXTENDED].
	(SA_ONSTACK): Change [__USE_UNIX98] condition to
	[__USE_XOPEN_EXTENDED].
	(SA_RESTART): Likewise.
	(SA_NODEFER): Likewise.
	(SA_RESETHAND): Likewise.
	* sysdeps/unix/sysv/linux/s390/bits/sigaction.h
	(struct sigaction): Define sa_handler and sa_sigaction using union
	also for [__USE_XOPEN_EXTENDED].
	(SA_ONSTACK): Change [__USE_UNIX98] condition to
	[__USE_XOPEN_EXTENDED].
	(SA_RESTART): Likewise.
	(SA_NODEFER): Likewise.
	(SA_RESETHAND): Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/sigaction.h
	(struct sigaction): Define sa_handler and sa_sigaction using union
	also for [__USE_XOPEN_EXTENDED].
	(SA_ONSTACK): Change [__USE_UNIX98] condition to
	[__USE_XOPEN_EXTENDED].
	(SA_RESTART): Likewise.
	(SA_NODEFER): Likewise.  Define directly rather than as alias.
	(SA_RESETHAND): Likewise.
	(SA_INTERRUPT): Define only for [__USE_MISC].
	(SA_NOMASK): Define as alias of SA_NODEFER, only for [__USE_MISC].
	(SA_ONESHOT): Define as alias of SA_RESETHAND, only for
	[__USE_MISC].
	(SA_STACK): Define only for [__USE_MISC].
	* sysdeps/unix/sysv/linux/tile/bits/sigaction.h
	(struct sigaction): Define sa_handler and sa_sigaction using union
	also for [__USE_XOPEN_EXTENDED].
	(SA_ONSTACK): Change [__USE_UNIX98] condition to
	[__USE_XOPEN_EXTENDED].
	(SA_RESTART): Likewise.
	(SA_NODEFER): Likewise.
	(SA_RESETHAND): Likewise.
	(SA_NOPTRACE): Define only for [__USE_MISC].

1 files changed, 3 insertions, 3 deletions

diff --git a/sysdeps/unix/sysv/linux/hppa/bits/sigaction.h b/sysdeps/unix/sysv/linux/hppa/bits/sigaction.h
index 06ba2db8f2..c763538822 100644
--- a/sysdeps/unix/sysv/linux/hppa/bits/sigaction.h
+++ b/sysdeps/unix/sysv/linux/hppa/bits/sigaction.h
@@ -26,7 +26,7 @@
 struct sigaction
   {
     /* Signal handler.  */
-#ifdef __USE_POSIX199309
+#if defined __USE_POSIX199309 || defined __USE_XOPEN_EXTENDED
     union
       {
 	/* Used if SA_SIGINFO is not set.  */
@@ -57,10 +57,10 @@ struct sigaction
 #define SA_NOCLDWAIT  0x00000080  /* Don't create zombie on child death.  */
 #define SA_SIGINFO    0x00000010  /* Invoke signal-catching function with
 				     three arguments instead of one.  */
-#if defined __USE_UNIX98 || defined __USE_MISC
+#if defined __USE_XOPEN_EXTENDED || defined __USE_MISC
 # define SA_ONSTACK   0x00000001 /* Use signal stack by using `sa_restorer'. */
 #endif
-#if defined __USE_UNIX98 || defined __USE_XOPEN2K8
+#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
 # define SA_RESETHAND 0x00000004 /* Reset to SIG_DFL on entry to handler.  */
 # define SA_NODEFER   0x00000020 /* Don't automatically block the signal
 				    when its handler is being executed.  */