Rework Makefile, add config.def.h as default config

Makefile

@@ -0,0 +1,24 @@
+CFLAGS = -Wall -Wextra -pedantic -lX11 -lXft -I/usr/include/freetype2 -lm -pthread
+
+PREFIX ?= /usr/local
+CC ?= cc
+
+all: herbe
+
+config.h: config.def.h
+	cp config.def.h config.h
+
+herbe: herbe.c config.h
+	$(CC) herbe.c $(CFLAGS) -o herbe
+
+install: herbe
+	mkdir -p ${DESTDIR}${PREFIX}/bin
+	cp -f herbe ${DESTDIR}${PREFIX}/bin
+
+uninstall:
+	rm -f ${DESTDIR}${PREFIX}/bin/herbe
+
+clean:
+	rm -f herbe
+
+.PHONY: all install uninstall clean