Add builddir

Makefile

@@ -16,7 +16,7 @@ ${OBJDIR}/%.o: %.c ${DEPS}
 	${CC} -c -o $@ $< ${CFLAGS}
 
 ${app}: ${OBJ}
-	${CC} -o $@ $^ ${CFLAGS}
+	${CC} -o ${BUILDDIR}/$@ $^ ${CFLAGS}
 
 clean:
 	@unset -f rm
@@ -24,7 +24,7 @@ clean:
 
 install: rush
 	mkdir -p ${DESTDIR}${PREFIX}/bin
-	cp -f ${app} ${DESTDIR}${PREFIX}/bin
+	cp -f ${BUILDDIR}/${app} ${DESTDIR}${PREFIX}/bin
 	chmod 755 ${DESTDIR}${PREFIX}/bin/${app}
 
 uninstall:

config.mk

@@ -4,6 +4,7 @@
 PREFIX = ~/.local
 INCDIR = include
 OBJDIR = obj
+BUILDDIR = build
 
 # includes
 INCS = -I${INCDIR}