From 84d6a615ea6324f8e00c18796df15a03f2caf6e1 Mon Sep 17 00:00:00 2001
From: Yonggang Luo <luoyonggang@gmail.com>
Date: Tue, 22 Nov 2022 18:23:31 +0800
Subject: [PATCH] util: Fixes -Wundef in u_debug_stack_test.cpp

Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Reviewed-by: Eric Engestrom <eric@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19926>
---
 src/util/tests/u_debug_stack_test.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/util/tests/u_debug_stack_test.cpp b/src/util/tests/u_debug_stack_test.cpp
index b9a563488c0..b86759b045a 100644
--- a/src/util/tests/u_debug_stack_test.cpp
+++ b/src/util/tests/u_debug_stack_test.cpp
@@ -78,7 +78,7 @@ TEST(u_debug_stack_test, basics)
    debug_backtrace_dump(stored_backtrace, 16);
 }
 
-#if _POSIX_C_SOURCE >= 200809L
+#if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200809L)
 
 TEST(u_debug_stack_test, capture_not_overwritten)
 {