From 9d1567ce16e486777c3f8f5aa5e016dc99082a7e Mon Sep 17 00:00:00 2001
From: Daniel Micay <danielmicay@gmail.com>
Date: Tue, 23 Oct 2018 15:55:45 -0400
Subject: [PATCH] make safe_flag check compatible with POSIX sh

---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index db4e8c1..4d3a205 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ CONFIG_UBSAN := false
 CONFIG_SEAL_METADATA := false
 
 define safe_flag
-$(shell $(CC) -E $1 - </dev/null &>/dev/null && echo $1)
+$(shell $(CC) -E $1 - </dev/null >/dev/null 2>&1 && echo $1)
 endef
 
 CPPFLAGS := -D_GNU_SOURCE