conformtest: Correct signal.h expectations for XPG4 / XPG42.

Various of the signal.h conform/ failures for XPG4 and XPG42 are
actually the result of incorrect test expectations rather than header
bugs.  This patch fixes the expectations to accord with those
standards (this does not however allow any XFAILs to be removed, as
some header bugs remain).  Note for anyone comparing with the
standards: corrigendum U013/16 removes the mention of a sigmask
function in signal.h (C435 lists such a function in the definition of
signal.h, but without any actual specification for the function
itself), so sigmask is not included in the expectations.

Tested for x86_64.

	* conform/data/signal.h-data (sa_sigaction): Do not expect for
	[XPG4].
	(SA_SIGINFO): Likewise.
	(SA_ONSTACK): Likewise.
	(SA_RESETHAND): Likewise.
	(SA_RESTART): Likewise.
	(SA_NOCLDWAIT): Likewise.
	(SA_NODEFER): Likewise.
	(SS_ONSTACK): Likewise.
	(SS_DISABLE): Likewise.
	(MINSIGSTKSZ): Likewise.
	(SIGSTKSZ): Likewise.
	(ucontext_t): Likewise.
	(stack_t): Likewise.
	(struct sigstack): Likewise.
	(SI_USER): Do not expect for [XPG4 || XPG42].
	(SI_QUEUE): Likewise.
	(SI_TIMER): Likewise.
	(SI_ASYNCIO): Likewise.
	(SI_MESGQ): Likewise.
	(bsd_signal): Do not expect for [XPG4].
	(killpg): Likewise.
	(sigaltstack): Likewise.
	(sighold): Likewise.
	(sigignore): Likewise.
	(siginterrupt): Likewise.
	(sigpause): Likewise.
	(sigrelse): Likewise.
	(sigset): Likewise.
	(sigwait): Do not expect for [XPG4 || XPG42].

ChangeLog

@@ -1,3 +1,36 @@
+2017-06-01  Joseph Myers  <joseph@codesourcery.com>
+
+	* conform/data/signal.h-data (sa_sigaction): Do not expect for
+	[XPG4].
+	(SA_SIGINFO): Likewise.
+	(SA_ONSTACK): Likewise.
+	(SA_RESETHAND): Likewise.
+	(SA_RESTART): Likewise.
+	(SA_NOCLDWAIT): Likewise.
+	(SA_NODEFER): Likewise.
+	(SS_ONSTACK): Likewise.
+	(SS_DISABLE): Likewise.
+	(MINSIGSTKSZ): Likewise.
+	(SIGSTKSZ): Likewise.
+	(ucontext_t): Likewise.
+	(stack_t): Likewise.
+	(struct sigstack): Likewise.
+	(SI_USER): Do not expect for [XPG4 || XPG42].
+	(SI_QUEUE): Likewise.
+	(SI_TIMER): Likewise.
+	(SI_ASYNCIO): Likewise.
+	(SI_MESGQ): Likewise.
+	(bsd_signal): Do not expect for [XPG4].
+	(killpg): Likewise.
+	(sigaltstack): Likewise.
+	(sighold): Likewise.
+	(sigignore): Likewise.
+	(siginterrupt): Likewise.
+	(sigpause): Likewise.
+	(sigrelse): Likewise.
+	(sigset): Likewise.
+	(sigwait): Do not expect for [XPG4 || XPG42].
+
 2017-06-01  Zack Weinberg  <zackw@panix.com>
 
 	[BZ #21514]

conform/data/signal.h-data

@@ -104,30 +104,34 @@ type {struct sigaction}
 element {struct sigaction} {void(*} sa_handler )(int)
 element {struct sigaction} sigset_t sa_mask
 element {struct sigaction} int sa_flags
+# ifndef XPG4
 element {struct sigaction} {void(*} sa_sigaction )(int, siginfo_t*, void*)
+# endif
 
 constant SA_NOCLDSTOP
+# ifndef XPG4
 constant SA_SIGINFO
+# endif
 constant SIG_BLOCK
 constant SIG_UNBLOCK
 constant SIG_SETMASK
-# if !defined POSIX && !defined POSIX2008
+# if !defined XPG4 && !defined POSIX && !defined POSIX2008
 constant SA_ONSTACK
 # endif
-# if !defined POSIX
+# if !defined XPG4 && !defined POSIX
 constant SA_RESETHAND
 constant SA_RESTART
 constant SA_NOCLDWAIT
 constant SA_NODEFER
 # endif
-# if !defined POSIX && !defined POSIX2008
+# if !defined XPG4 && !defined POSIX && !defined POSIX2008
 constant SS_ONSTACK
 constant SS_DISABLE
 constant MINSIGSTKSZ
 constant SIGSTKSZ
 # endif
 
-# if !defined POSIX
+# if !defined XPG4 && !defined POSIX
 type ucontext_t
 
 element ucontext_t {ucontext_t*} uc_link
@@ -208,17 +212,19 @@ constant POLL_HUP
 constant TRAP_BRKPT
 constant TRAP_TRACE
 # endif
+# if !defined XPG4 && !defined XPG42
 constant SI_USER
 constant SI_QUEUE
 constant SI_TIMER
 constant SI_ASYNCIO
 constant SI_MESGQ
+# endif
 
-# if !defined XOPEN2K8 && !defined POSIX && !defined POSIX2008
+# if !defined XPG4 && !defined XOPEN2K8 && !defined POSIX && !defined POSIX2008
 function void (*bsd_signal (int, void(*)(int)))(int)
 # endif
 function int kill (pid_t, int)
-# if !defined POSIX && !defined POSIX2008
+# if !defined XPG4 && !defined POSIX && !defined POSIX2008
 function int killpg (pid_t, int)
 # endif
 # if !defined XPG4 && !defined XPG42
@@ -227,19 +233,19 @@ function int pthread_sigmask (int, const sigset_t*, sigset_t*)
 # endif
 function int sigaction (int, const struct sigaction*, struct sigaction*)
 function int sigaddset (sigset_t*, int)
-# if !defined POSIX && !defined POSIX2008
+# if !defined XPG4 && !defined POSIX && !defined POSIX2008
 function int sigaltstack (const stack_t*, stack_t*)
 # endif
 function int sigdelset (sigset_t*, int)
 function int sigemptyset (sigset_t*)
 function int sigfillset (sigset_t*)
-# if !defined POSIX && !defined POSIX2008
+# if !defined XPG4 && !defined POSIX && !defined POSIX2008
 function int sighold (int)
 function int sigignore (int)
 function int siginterrupt (int, int)
 # endif
 function int sigismember (const sigset_t*, int)
-#if !defined POSIX && !defined POSIX2008
+#if !defined XPG4 && !defined POSIX && !defined POSIX2008
 function int sigpause (int)
 # endif
 function int sigpending (sigset_t*)
@@ -247,7 +253,7 @@ function int sigprocmask (int, const sigset_t*, sigset_t*)
 # if !defined XPG4 && !defined XPG42
 function int sigqueue (pid_t, int, const union sigval)
 # endif
-# if !defined POSIX && !defined POSIX2008
+# if !defined XPG4 && !defined POSIX && !defined POSIX2008
 function int sigrelse (int)
 function void (*sigset (int, void(*)(int)))(int)
 # endif
@@ -258,8 +264,8 @@ function int sigsuspend (const sigset_t*)
 # if !defined XPG4 && !defined XPG42
 function int sigtimedwait (const sigset_t*, siginfo_t*, const struct timespec*)
 # endif
-function int sigwait (const sigset_t*, int*)
 # if !defined XPG4 && !defined XPG42
+function int sigwait (const sigset_t*, int*)
 function int sigwaitinfo (const sigset_t*, siginfo_t*)
 # endif
 # if defined XOPEN2K8 || defined POSIX2008