From 3ccbdf7aa494ce854d9f346ab6bd6f51b952ff32 Mon Sep 17 00:00:00 2001
From: Sami Kerola
Date: Sun, 2 Dec 2018 16:28:22 +0000
Subject: include/c: check returns_nonnull function attribute with
 __GNUC_PREREQ

Karel pointed out previous commit could have been better in github feedback,
so lets use the version check macro instead of compare versions directly.

Previous-commit: f1b327f8d5c8de7bf7fae99e85765d0954a25bac
Reference: https://github.com/karelzak/util-linux/pull/704#issuecomment-432605211
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
---
 include/c.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/c.h b/include/c.h
index 8b2a2d19a..059fadf0b 100644
--- a/include/c.h
+++ b/include/c.h
@@ -80,7 +80,7 @@
 # endif
 #endif
 
-#if (__GNUC__ >= 5) || ((__GNUC__ >= 4) && (__GNUC_MINOR__ >= 9))
+#if __GNUC_PREREQ (4, 9)
 # define __ul_returns_nonnull __attribute__((returns_nonnull))
 #else
 # define __ul_returns_nonnull
-- 
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