PATCH: Don't unconditionally use snprintf() in libgfortran (PR libfortran/32345)

[Rainer Orth]

As described in the PR, all gfortran execute tests fail since libgfortran
uses snprintf() unconditionally in one place, but the platform libc lacks
it.  The following patch fixes it: a libgfortran rebuild and retest are in
progress, but the first execute tests pass as expected.

Ok for mainline if it passes?  I think this almost qualifies as obvious.
The 4.2 branch doesn't have backtrace.c and is thus unaffected.

	Rainer

-----------------------------------------------------------------------------
Rainer Orth, Faculty of Technology, Bielefeld University


Thu Jun 14 18:27:54 2007  Rainer Orth  <ro@TechFak.Uni-Bielefeld.DE>

	PR libfortran/32345
	* runtime/backtrace.c (show_backtrace): Only use snprintf if
	available.

Index: libgfortran/runtime/backtrace.c
===================================================================
--- libgfortran/runtime/backtrace.c	(revision 125646)
+++ libgfortran/runtime/backtrace.c	(working copy)
@@ -301,7 +301,11 @@ fallback:
 
 	st_printf ("\nBacktrace for this error:\n");
 	arg[0] = (char *) "pstack";
+#ifdef HAVE_SNPRINTF
 	snprintf (buf, sizeof(buf), "%d", (int) getppid ());
+#else
+	sprintf (buf, "%d", (int) getppid ());
+#endif
 	arg[1] = buf;
 	arg[2] = NULL;
 	execvp (arg[0], arg);