From 2d8db00d33e2c38d7a4f802f268a75a1797320ad Mon Sep 17 00:00:00 2001
From: Marco Maggi <marco.maggi-ipsu@poste.it>
Date: Thu, 18 Oct 2018 13:30:05 +0200
Subject: [PATCH] better flag variable assignment

---
 expat/configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/expat/configure.ac b/expat/configure.ac
index 20d894d0..ab4ea5a4 100644
--- a/expat/configure.ac
+++ b/expat/configure.ac
@@ -50,7 +50,7 @@ LIBCURRENT=7   # sync
 LIBREVISION=8  # with
 LIBAGE=6       # CMakeLists.txt!
 
-AS_VAR_APPEND(CPPFLAGS," -DHAVE_EXPAT_CONFIG_H")
+AX_APPEND_FLAG([-DHAVE_EXPAT_CONFIG_H], [CPPFLAGS])
 AC_CONFIG_HEADER([expat_config.h])
 
 AM_PROG_AR