LDFLAGS += -Wl,--warn-common
+CFLAGS :=
+
# Use pipes and not temp files.
CFLAGS += -pipe
# optimize even more
CFLAGS += -Wpointer-arith
# warn about multiple declarations
CFLAGS += -Wredundant-decls
+# warn if the format string is not a string literal
+CFLAGS += -Wformat-nonliteral