Makefile: pass CPPFLAGS through to fllow customization

diff --git a/Makefile b/Makefile
index 910f4713ef1491278500573bab2d00ee1925abb8..da0cfda3e8a5b8b04012862e66b84da34af680a6 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -246,7 +246,7 @@ endif
 
 CFLAGS = -g -O2 -Wall
 LDFLAGS =
-ALL_CFLAGS = $(CFLAGS)
+ALL_CFLAGS = $(CPPFLAGS) $(CFLAGS)
 ALL_LDFLAGS = $(LDFLAGS)
 STRIP ?= strip