From 28b9319379efad9f7073b8016a0df7b393294557 Mon Sep 17 00:00:00 2001
From: Hin-Tak Leung <htl10@users.sourceforge.net>
Date: Fri, 4 Dec 2020 22:05:28 +0000
Subject: [PATCH] older compiler than gcc 5 does not have __has_attribute

---
 sound-compatible-4.18.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound-compatible-4.18.h b/sound-compatible-4.18.h
index faed848..c9fe0f6 100644
--- a/sound-compatible-4.18.h
+++ b/sound-compatible-4.18.h
@@ -16,7 +16,7 @@
 #endif
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(5,4,0)
-#if __has_attribute(__fallthrough__)
+#if defined(__has_attribute) && __has_attribute(__fallthrough__)
 # define fallthrough                    __attribute__((__fallthrough__))
 #else
 # define fallthrough                    do {} while (0)  /* fallthrough */