From c212fc932a63fe11289f7fc359e9364c25d27d23 Mon Sep 17 00:00:00 2001
From: nick87720z <nick87720z@gmail.com>
Date: Fri, 16 Oct 2020 05:09:40 +0500
Subject: [PATCH] configure.ac: NOTIFY_CFLAGS is not set

This sort of assignment, +=, works in makefiles, but not in shell scripts.
---
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 0dbba26..48a3ee5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -86,7 +86,7 @@ fi
 if test "x${notify}" = xyes; then
 # Check for libnotify
 PKG_CHECK_MODULES([NOTIFY], [libnotify >= 0.5.0])
-NOTIFY_CFLAGS+="-DCOMPILEWITH_NOTIFY"
+NOTIFY_CFLAGS="${NOTIFY_CFLAGS} -DCOMPILEWITH_NOTIFY"
 AC_SUBST(NOTIFY_CFLAGS)
 AC_SUBST(NOTIFY_LIBS)
 fi