From 1219b65f2167fabe58ce77f4bd7447da5fa02611 Mon Sep 17 00:00:00 2001
From: Victor Zverovich <victor.zverovich@gmail.com>
Date: Thu, 5 Dec 2019 10:04:29 -0800
Subject: [PATCH] Relax fallthrough attribute detection

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

diff --git a/include/fmt/format.h b/include/fmt/format.h
index 600b0eba..770cc145 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -69,7 +69,8 @@
 #  define FMT_HAS_BUILTIN(x) 0
 #endif
 
-#if FMT_HAS_CPP_ATTRIBUTE(fallthrough) >= 201603 && __cplusplus >= 201703
+#if FMT_HAS_CPP_ATTRIBUTE(fallthrough) && \
+    (__cplusplus >= 201703 || FMT_GCC_VERSION != 0)
 #  define FMT_FALLTHROUGH [[fallthrough]]
 #else
 #  define FMT_FALLTHROUGH