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Old 12-05-2011, 06:47 PM   #1
Ajay Kumar
LQ Newbie
 
Registered: Jul 2008
Posts: 8

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Makefile output


I haven't been able to undertand Makefile 'error', 'warning' and 'info' commands used for displaying output. I have got them working in some cases though. Here is the current problem I am stuck with.
Code:
$(LCD_LIB) : $(RAMTEX_OBJS)
	$(CSTOOL_PREFIX)ar cr $(RAMTEX_BIN_DIR)/$(LCD_LIB) $^ 
	$(info copying the library to $(abspath $(COMMON_LIB_DIR))) 
	sudo cp --preserve $(RAMTEX_BIN_DIR)/$(LCD_LIB) $(COMMON_LIB_DIR)/
I don't know why doesn't it print the output the way I expect. Here I want to display the string "copying the ..." after bulding the static library. However, it prints the display string first and then builds library as shown below.

copying the library to /home/asabat/manhattan/simple_ui_project/lib
arm-none-linux-gnueabi-ar cr ./bin/libramtex.a obj/gcarc.o obj/gchlnsp.o ...
sudo cp --preserve ./bin/libramtex.a ../lib/

If I modify the Makefile to use echo instead of info, that works fine as given below.
Code:
$(LCD_LIB) : $(RAMTEX_OBJS)
	$(CSTOOL_PREFIX)ar cr $(RAMTEX_BIN_DIR)/$(LCD_LIB) $^ 
	@echo -e "copying the library to $(abspath $(COMMON_LIB_DIR))"  
	sudo cp --preserve $(RAMTEX_BIN_DIR)/$(LCD_LIB) $(COMMON_LIB_DIR)/
arm-none-linux-gnueabi-ar cr ./bin/libramtex.a obj/gcarc.o obj/gchlnsp.o ...
copying the library to /home/asabat/manhattan/simple_ui_project/lib
sudo cp --preserve ./bin/libramtex.a ../lib/

I have seen these issues even while using the other commands 'warning' and 'error'. I will appreciate any help in understanding my mistake here.
 
Old 12-07-2011, 01:04 PM   #2
Ajay Kumar
LQ Newbie
 
Registered: Jul 2008
Posts: 8

Original Poster
Rep: Reputation: 0
I think it is not a good idea to use the $(info ) function inside a recipe.
If it is used inside a recipe, then make would execute that first before even submitting the first rule to shell for execution.
 
  


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