From 335ba9b6c1db7030264de7d9e38047f645326e54 Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Sat, 14 Dec 2024 20:12:21 +0800
Subject: Return EXIT_UNSUPPORTED if __builtin_add_overflow unavailable
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Since GCC 4.9 doesn't have __builtin_add_overflow:

In file included from tst-stringtable.c:180:0:
stringtable.c: In function ‘stringtable_finalize’:
stringtable.c:185:7: error: implicit declaration of function ‘__builtin_add_overflow’ [-Werror=implicit-function-declaration]
       else if (__builtin_add_overflow (previous->offset,
       ^

return EXIT_UNSUPPORTED for GCC 4.9 or older.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Sam James <sam@gentoo.org>
---
 io/tst-utimensat-skeleton.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'io')

diff --git a/io/tst-utimensat-skeleton.c b/io/tst-utimensat-skeleton.c
index 290ed81c9b..1386fa3c8f 100644
--- a/io/tst-utimensat-skeleton.c
+++ b/io/tst-utimensat-skeleton.c
@@ -20,6 +20,7 @@
 #include <inttypes.h>
 #include <support/support.h>
 #include <support/temp_file.h>
+#include <support/test-driver.h>
 #include <stdio.h>
 
 static int temp_fd = -1;
@@ -72,6 +73,7 @@ do_test (void)
   for (int i = 0; i < array_length (tests); i++)
     {
       /* Check if we run on port with 32 bit time_t size.  */
+#if __GNUC_PREREQ (5, 0)
       time_t t;
       if (__builtin_add_overflow (tests[i].v1, 0, &t)
 	  || __builtin_add_overflow (tests[i].v2, 0, &t))
@@ -80,6 +82,9 @@ do_test (void)
 		  "time_t overflows\n", i, tests[i].v1, tests[i].v2);
 	  continue;
         }
+#else
+      return EXIT_UNSUPPORTED;
+#endif
 
       if (tests[i].v1 >= 0x100000000LL && !y2106)
 	{
-- 
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