From 2ae121c7aa93a0d0cacde7f5818843225ad630d3 Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Fri, 13 Jan 2017 14:26:33 +0100
Subject: make: Enable additional GCC warnings

Enable some sensible GCC warnings for default build. The list of flags
was based on the flags from the nftables source.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
---
 Makefile | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 0f53165..a991a08 100644
--- a/Makefile
+++ b/Makefile
@@ -31,7 +31,12 @@ ifeq ($(DEBUG), 1)
   CFLAGS_MIN += -g -DDEBUG
 endif
 
-CFLAGS ?= -O2
+CFLAGS_WARN := -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations	\
+	-Wdeclaration-after-statement -Wsign-compare -Winit-self		\
+	-Wformat-nonliteral -Wformat-security -Wmissing-format-attribute	\
+	-Wundef -Wbad-function-cast -Waggregate-return -Wunused -Wwrite-strings
+
+CFLAGS ?= -O2 $(CFLAGS_WARN)
 override CFLAGS := $(CFLAGS_MIN) $(CFLAGS)
 
 Q	?= @
-- 
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