From: Ole Streicher <olebole@debian.org>
Date: Sat, 1 Jul 2017 20:45:22 +0200
Subject: Don't replace CPPFLAGS, but add to them

---
 naco/Makefile.am | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/naco/Makefile.am b/naco/Makefile.am
index d5d4e0a..220c8ff 100644
--- a/naco/Makefile.am
+++ b/naco/Makefile.am
@@ -30,7 +30,7 @@ MAINTAINERCLEANFILES = Makefile.in
 endif
 
 
-CPPFLAGS = -DCX_LOG_DOMAIN=\"NacoLib\"
+CPPFLAGS += -DCX_LOG_DOMAIN=\"NacoLib\"
 
 AM_CPPFLAGS = $(all_includes) $(GSL_INCLUDES)
 
