From 37e863f3c1afe7c8b1e038027bdcc1c0f52dfd58 Mon Sep 17 00:00:00 2001
From: Yonggang Luo <luoyonggang@gmail.com>
Date: Tue, 22 Nov 2022 18:01:07 +0800
Subject: [PATCH] util: Fixes -Wundef in util/compiler.h

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/compiler.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/util/compiler.h b/src/util/compiler.h
index f6a358e2f04..ebb0ac8c94b 100644
--- a/src/util/compiler.h
+++ b/src/util/compiler.h
@@ -87,7 +87,8 @@
 #  define HAS_CLANG_FALLTHROUGH 0
 #endif
 
-#if __cplusplus >= 201703L || __STDC_VERSION__ > 201710L
+#if (defined(__cplusplus) && (__cplusplus >= 201703L)) || \
+    (defined(__STDC_VERSION__) && (__STDC_VERSION__ > 201710L))
 /* Standard C++17/C23 attribute */
 #define FALLTHROUGH [[fallthrough]]
 #elif HAS_CLANG_FALLTHROUGH