-CFLAGS += -Wall -Wextra -I. -fno-strict-aliasing -fsigned-char -O2
-CFLAGS += -DGMQCC_GITINFO="`git describe`"
+CFLAGS += -Wall -Wextra -I. -fno-strict-aliasing -fsigned-char
+ifneq ($(shell git describe --always 2>/dev/null),)
+ CFLAGS += -DGMQCC_GITINFO="\"$(shell git describe --always)\""
+endif