-W -Wformat -Wall -Wundef -Wpointer-arith -Wcast-qual \
-Wcast-align -Wwrite-strings -Wsign-compare \
-Wmissing-prototypes -Wmissing-noreturn \
-W -Wformat -Wall -Wundef -Wpointer-arith -Wcast-qual \
-Wcast-align -Wwrite-strings -Wsign-compare \
-Wmissing-prototypes -Wmissing-noreturn \