Adjust strsignal to POSIX 200x prototype.

2008-06-19  Eric Blake  <ebb9@byu.net>

	Adjust strsignal to POSIX 200x prototype.
	* strsignal.c (strsignal): Remove const.

From-SVN: r136949

libiberty/ChangeLog

+2008-06-19  Eric Blake  <ebb9@byu.net>
+
+	Adjust strsignal to POSIX 200x prototype.
+	* strsignal.c (strsignal): Remove const.
+
 2008-06-17  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
 
 	* configure: Regenerate.

libiberty/strsignal.c

@@ -404,10 +404,10 @@ call to @code{strsignal}.
 
 #ifndef HAVE_STRSIGNAL
 
-const char *
+char *
 strsignal (int signo)
 {
-  const char *msg;
+  char *msg;
   static char buf[32];
 
 #ifndef HAVE_SYS_SIGLIST
@@ -428,12 +428,14 @@ strsignal (int signo)
     {
       /* In range, but no sys_siglist or no entry at this index. */
       sprintf (buf, "Signal %d", signo);
-      msg = (const char *) buf;
+      msg = buf;
     }
   else
     {
-      /* In range, and a valid message.  Just return the message. */
-      msg = (const char *) sys_siglist[signo];
+      /* In range, and a valid message.  Just return the message.  We
+	 can safely cast away const, since POSIX says the user must
+	 not modify the result.	 */
+      msg = (char *) sys_siglist[signo];
     }
 
   return (msg);