add format string warnings

diff --git a/Makefile b/Makefile
index 0bff86f..c0cfce8 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -23,7 +23,7 @@ CC = gcc
 LD = gcc
 INCLUDES = -I.
 CPPFLAGS = $(INCLUDES) $(DEFINES)
-CFLAGS = -Wall $(OPTIM)
+CFLAGS = -Wall -Wformat-security -Wno-format-zero-length $(OPTIM)
 LDFLAGS =
 LDLIBS =
 INSTALL = install -c -D -o root -g root