[PATCH v2] gcc.c-torture/execute/builtins/fputs.c: fputs_unlocked prototype

[Florian Weimer <fweimer@redhat.com>]

Current glibc headers only declare fputs_unlocked for _GNU_SOURCE,
so define it to obtain an official prototype.

Add a fallback prototype declaration for other systems that do not
have fputs_unlocked.  This seems to the most straightforward approach
to avoid an implicit function declaration, without reducing test
coverage and introducing ongoing maintenance requirements (e.g.g,
FreeBSD added fputs_unlocked support fairly recently).

gcc/testsuite/

	* gcc.c-torture/execute/builtins/fputs.c (_GNU_SOURCE):
	Define.
	(fputs_unlocked): Declare.

---
 gcc/testsuite/gcc.c-torture/execute/builtins/fputs.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gcc/testsuite/gcc.c-torture/execute/builtins/fputs.c b/gcc/testsuite/gcc.c-torture/execute/builtins/fputs.c
index 93fa9736449..a94ea993364 100644
--- a/gcc/testsuite/gcc.c-torture/execute/builtins/fputs.c
+++ b/gcc/testsuite/gcc.c-torture/execute/builtins/fputs.c
@@ -5,9 +5,13 @@
 
    Written by Kaveh R. Ghazi, 10/30/2000.  */
 
+#define _GNU_SOURCE /* For fputs_unlocked.  */
 #include <stdio.h>
 extern void abort(void);
 
+/* Not all systems have fputs_unlocked.  See fputs-lib.c.  */
+extern int (fputs_unlocked) (const char *, FILE *);
+
 int i;
 
 void

base-commit: 0e29c6f65523dad20068ba69cd03d8f6f82cab41