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>
2022-11-22 18:01:07 +08:00
parent b461921ed8
commit 37e863f3c1
1 changed files with 2 additions and 1 deletions
@@ -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