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-rw-r--r--pppdump/Makefile.linux3
1 files changed, 2 insertions, 1 deletions
diff --git a/pppdump/Makefile.linux b/pppdump/Makefile.linux
index 0457561..742a4b8 100644
--- a/pppdump/Makefile.linux
+++ b/pppdump/Makefile.linux
@@ -2,7 +2,8 @@ DESTDIR = $(INSTROOT)@DESTDIR@
BINDIR = $(DESTDIR)/sbin
MANDIR = $(DESTDIR)/share/man/man8
-CFLAGS= -O -I../include/net
+CFLAGS ?= -O
+CFLAGS += -I../include/net
OBJS = pppdump.o bsd-comp.o deflate.o zlib.o
INSTALL= install