X-Git-Url: http://git.tuebingen.mpg.de/?a=blobdiff_plain;f=Makefile.real;h=8ededf6aff8300608a5939429779ecd7b1753626;hb=eab41e87;hp=980192ecf5543bcde432575128ad0723e5ab82f8;hpb=a775408e5d2e3b21dff741b89ff5330b397b5138;p=paraslash.git

diff --git a/Makefile.real b/Makefile.real
index 980192ec..8ededf6a 100644
--- a/Makefile.real
+++ b/Makefile.real
@@ -18,7 +18,7 @@ uname_s := $(shell uname -s 2>/dev/null || echo "UNKNOWN_OS")
 uname_rs := $(shell uname -rs)
 cc_version := $(shell $(CC) --version | head -n 1)
 GIT_VERSION := $(shell ./GIT-VERSION-GEN git-version.h)
-COPYRIGHT_YEAR := 2016
+COPYRIGHT_YEAR := 2017
 
 ifeq ("$(origin O)", "command line")
 	build_dir := $(O)
@@ -125,6 +125,13 @@ ifeq ($(uname_s),Linux)
 	LDFLAGS += -Wl,--gc-sections
 endif
 
+cc-option = $(shell \
+	$(CC) $(1) -Werror -c -x c /dev/null -o /dev/null > /dev/null 2>&1 \
+	&& echo "$(1)" \
+)
+
+STRICT_CFLAGS += $(call cc-option, -Wformat-signedness)
+
 # To put more focus on warnings, be less verbose as default
 # Use 'make V=1' to see the full commands
 ifeq ("$(origin V)", "command line")