signal.h: provide prototype for __libc_sigaction and remove all others

Signed-off-by: Peter S. Mazinger <ps.m@gmx.net>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

include/signal.h

@@ -290,7 +290,10 @@ libc_hidden_proto(sigsuspend)
 /* Get and/or set the action for signal SIG.  */
 extern int sigaction (int __sig, __const struct sigaction *__restrict __act,
 		      struct sigaction *__restrict __oact) __THROW;
+#ifdef _LIBC
+extern __typeof(sigaction) __libc_sigaction;
 libc_hidden_proto(sigaction)
+#endif
 
 /* Put in SET all signals that are blocked and waiting to be delivered.  */
 extern int sigpending (sigset_t *__set) __THROW __nonnull ((1));

libc/signal/sigaction.c

@@ -24,11 +24,6 @@
 
 #include <bits/kernel_sigaction.h>
 
-#ifndef LIBC_SIGACTION
-extern __typeof(sigaction) __libc_sigaction;
-#endif
-
-
 #if defined __NR_rt_sigaction
 
 /* If ACT is not NULL, change the action for SIG to *ACT.

libc/sysdeps/linux/arm/sigaction.c

@@ -29,8 +29,6 @@
 extern void __default_sa_restorer(void);
 extern void __default_rt_sa_restorer(void);
 
-extern __typeof(sigaction) __libc_sigaction;
-
 /* When RT signals are in use we need to use a different return stub.  */
 #ifdef __NR_rt_sigreturn
 #define choose_restorer(flags)					\

libc/sysdeps/linux/avr32/sigaction.c

@@ -14,8 +14,6 @@
 #define SA_RESTORER	0x04000000
 extern void __default_rt_sa_restorer(void);
 
-extern __typeof(sigaction) __libc_sigaction;
-
 /*
  * If act is not NULL, change the action for sig to *act.
  * If oact is not NULL, put the old action for sig in *oact.

libc/sysdeps/linux/c6x/sigaction.c

@@ -31,8 +31,6 @@
 
 #define SA_RESTORER	0x04000000
 
-extern __typeof(sigaction) __libc_sigaction;
-
 extern void restore_rt(void) __asm__ ("__restore_rt") attribute_hidden;
 extern void restore(void) __asm__ ("__restore") attribute_hidden;
 

libc/sysdeps/linux/i386/sigaction.c

@@ -27,9 +27,6 @@
 
 #define SA_RESTORER	0x04000000
 
-extern __typeof(sigaction) __libc_sigaction;
-
-
 #if defined __NR_rt_sigaction
 
 extern void restore_rt(void) __asm__ ("__restore_rt") attribute_hidden;

libc/sysdeps/linux/mips/sigaction.c

@@ -27,9 +27,6 @@
 
 #define SA_RESTORER	0x04000000
 
-extern __typeof(sigaction) __libc_sigaction;
-
-
 #ifdef __NR_rt_sigaction
 
 # if _MIPS_SIM != _ABIO32

libc/sysdeps/linux/x86_64/sigaction.c

@@ -30,9 +30,6 @@
 /* We do not globally define the SA_RESTORER flag so do it here.  */
 #define SA_RESTORER 0x04000000
 
-extern __typeof(sigaction) __libc_sigaction;
-
-
 #ifdef __NR_rt_sigaction
 
 /* Using the hidden attribute here does not change the code but it

libpthread/linuxthreads.old/pthread.c

@@ -36,8 +36,6 @@
 #include <sys/types.h>
 #include <sys/syscall.h>
 
-/* mods for uClibc: __libc_sigaction is not in any standard headers */
-extern __typeof(sigaction) __libc_sigaction;
 libpthread_hidden_proto(waitpid)
 libpthread_hidden_proto(raise)
 

libpthread/linuxthreads.old/signals.c

@@ -22,9 +22,6 @@
 #include "spinlock.h"
 #include <bits/sigcontextinfo.h>
 
-/* mods for uClibc: __libc_sigaction is not in any standard headers */
-extern __typeof(sigaction) __libc_sigaction;
-
 int pthread_sigmask(int how, const sigset_t * newmask, sigset_t * oldmask)
 {
   sigset_t mask;

libpthread/linuxthreads/pthread.c

@@ -37,9 +37,6 @@
 # error "This must not happen"
 #endif
 
-/* mods for uClibc: __libc_sigaction is not in any standard headers */
-extern __typeof(sigaction) __libc_sigaction;
-
 #if !(USE_TLS && HAVE___THREAD)
 /* These variables are used by the setup code.  */
 extern int _errno;

libpthread/linuxthreads/signals.c

@@ -20,9 +20,6 @@
 #include "internals.h"
 #include "spinlock.h"
 
-/* mods for uClibc: __libc_sigaction is not in any standard headers */
-extern __typeof(sigaction) __libc_sigaction;
-
 int pthread_sigmask(int how, const sigset_t * newmask, sigset_t * oldmask)
 {
   sigset_t mask;

libpthread/nptl/init.c

@@ -35,7 +35,6 @@
 #include <lowlevellock.h>
 #include <bits/kernel-features.h>
 #include <stdio.h>
-extern __typeof(sigaction) __libc_sigaction;
 
 /* Size and alignment of static TLS block.  */
 size_t __static_tls_size;