--- iproute2-4.10.0.orig/Makefile	2017-02-20 17:47:52.000000000 +0100
+++ iproute2-4.10.0/Makefile	2017-04-23 20:17:20.972119072 +0200
@@ -40,16 +40,16 @@ ADDLIB+=ipx_ntop.o ipx_pton.o
 #options for mpls
 ADDLIB+=mpls_ntop.o mpls_pton.o
 
-CC := gcc
+CC ?= gcc
 HOSTCC ?= $(CC)
 DEFINES += -D_GNU_SOURCE
 # Turn on transparent support for LFS
 DEFINES += -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
-CCOPTS = -O2
 WFLAGS := -Wall -Wstrict-prototypes  -Wmissing-prototypes
 WFLAGS += -Wmissing-declarations -Wold-style-definition -Wformat=2
 
-CFLAGS := $(WFLAGS) $(CCOPTS) -I../include $(DEFINES) $(CFLAGS)
+CFLAGS ?=
+CFLAGS += $(WFLAGS) -I../include $(DEFINES)
 YACCFLAGS = -d -t -v
 
 SUBDIRS=lib ip tc bridge misc netem genl tipc devlink man