fix a little bug on pack command

Signed-off-by: Menglong Dong <imagedong@tencent.com>

Author: menglongdong

Makefile

@@ -4,19 +4,21 @@ RELEASE		?= tl3
 export RELEASE
 
 targets		:= droptrace nodetrace src legacy
-targets-call	= for i in $^; do make -C $$i $@; done
+targets-call	= for i in $^; do make $1 -C $$i $@; done
 man-target 	:= script/zh_CN/nettrace.8
 
-ROOT	:= $(abspath .)
+ROOT		:= $(abspath .)
 export ROOT
-PREFIX	?= ./output
-PREFIX	:= $(abspath $(PREFIX))
-MAN_DIR	:= $(PREFIX)/usr/share/man
-BCOMP	:= ${PREFIX}/usr/share/bash-completion/completions/
+PREFIX		?= ./output
+PREFIX		:= $(abspath $(PREFIX))
+MAN_DIR		:= $(PREFIX)/usr/share/man
+BCOMP		:= ${PREFIX}/usr/share/bash-completion/completions/
 export PREFIX
-SCRIPT	= $(ROOT)/script
+SCRIPT		= $(ROOT)/script
 export SCRIPT
-SOURCE_DIR := ~/rpmbuild/SOURCES/nettrace-${VERSION}
+SOURCE_DIR	:= ~/rpmbuild/SOURCES/nettrace-${VERSION}
+PACK_TARGET 	:= nettrace-$(VERSION)-$(RELEASE)
+PACK_PATH	:= $(abspath $(PREFIX)/$(PACK_TARGET))
 
 all clean:: $(targets)
 	$(call targets-call)
@@ -42,13 +44,11 @@ install: man $(targets)
 	@mkdir -p $(BCOMP); cd $(BCOMP); cp $(SCRIPT)/bash-completion.sh \
 		./nettrace; ln -s nettrace droptrace
 
-PACK_TARGET := nettrace-$(VERSION)-$(RELEASE)
 pack: $(targets)
-	@mkdir -p $(PREFIX)/$(PACK_TARGET)
-	$(call targets-call)
-	@cd $(PREFIX) && ls -p | grep -v / | xargs -I % mv % \
-		$(PACK_TARGET) && \
-		tar -cjf $(PACK_TARGET).tar.bz2 $(PACK_TARGET)
+	@make clean
+	@rm -rf $(PACK_PATH) && mkdir -p $(PACK_PATH)
+	$(call targets-call,PREFIX=$(PACK_PATH))
+	@cd $(PREFIX) && tar -cjf $(PACK_TARGET).tar.bz2 $(PACK_TARGET)
 
 rpm:
 	@make clean