+# make ... for both libusb and libsg
+#
+# make CONFIG_USE_LIBSG=0 ...
+# for just libusb
+#
+CC=gcc
+
CFLAGS+=-g
-CFLAGS+=-DCONFIG_USE_LIBUSB
-CFLAGS+=-DCONFIG_USE_LIBSG
+CFLAGS+=-DCONFIG_USE_LIBUSB=1
CFLAGS+=-DDEBUG
CFLAGS+=-std=gnu99
CFLAGS+=-Wall -Wextra
CFLAGS+=-I../src
-LDFLAGS=-L.. -lstlink -lusb-1.0 -lsgutils2
+LDFLAGS=-lusb-1.0 -L.. -lstlink
+
+ifeq ($(CONFIG_USE_LIBSG),)
+CONFIG_USE_LIBSG=1
+endif
+
+ifneq ($(CONFIG_USE_LIBSG),0)
+CFLAGS+=-DCONFIG_USE_LIBSG=1
+LDFLAGS+=-lsgutils2
+endif
SRCS=main.c
OBJS=$(SRCS:.c=.o)