From owner-freebsd-hackers  Tue Feb 16  9:17:31 1999
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From: Emmanuel DELOGET <pixel@DotCom.FR>
Message-Id: <199902161717.RAA01752@excalibur.oceanis.net>
Subject: Re: Makefile: >1 program without a single target each.
In-Reply-To: <19990216154145.A1700@cs.uni-magdeburg.de> from Roland Jesse at "Feb 16, 1999  3:41:45 pm"
To: jesse@prinz-atm.CS.Uni-Magdeburg.De (Roland Jesse)
Date: Tue, 16 Feb 1999 18:17:18 +0100 (MET)
Cc: hackers@FreeBSD.ORG (FreeBSD Hackers Mail List)
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As the well known Roland Jesse said...
-> Hello,
->
-> Assumed, I have the source code for more than just one program in a
-> directory (because they share a couple source code files). How does
-> the Makefile has to / should look like?
->
-> Normally, I would do something like:
->
-> [makefile deleted]
-> 
-> But what do I do when the Makefile is supposed to handle more than
-> just one potential target? How do I specify the OBJS variable
-> depending on the different source files?
->
-> [other deleted makefile] 
->
-> Any ideas to get around the OBJS-problem are appreciated.
->
	My idea is you may use a classic src/lib, src/prg1, src/prg2
	directory tree. You may put the shared source files in the
	lib directory, with an independant Makefile. Then, in the
	other directories, you put the proggies related source code.

	I like this architecture, because it's very clear (don't spend
	hours about searching which files are related to a project,
	and which files are not).

	You may  put a more basic makefile in the top src dir (something
	like

	# top Makefile ------------------------------------------------
	TARGETDIRS = lib prg1 prg2

	all : 
		@for i in $(TARGETDIRS); do \
		  @echo "** entering directory "$$i ; \
		  (cd $$i ; $(MAKE) all CFLAGS=$(CFLAGS) ); \
		  @echo "** living directory "$$i ; \
		done

	# src/lib Makefile ---------------------------------------------
	LIBNAME = mylib
	SRCS = lib_1.C lib_2.c lib_n.c
	OBJS = $(SRCS:.c=.o)

	all : $(OBJS)
		@$(AR) $(CREATEARCHVE) lib$(LIBNAME).a $(OBJS)
		@$(RANLIB) $(RANLIBOPTIONS) lib$(LIBNAME).a

	# src/prgn Makefile --------------------------------------------
	# you may use the bsd.prog.mk file here, of course...
	LIBDIR += -L../lib
	LIBS += -lmylib
	SRCS = prgn_1.c prgn_p.c
	OBJS = $(SRCS:.c=.o)
	PRGNAME = prgn

	all : $(OBJS)
		$(CC) $(CFLAGS) -o $(PRGNAME) $(LIBDIR) $(LIBS)

	Of course, this is just an idea... ;)

->	Roland

-- 
____________________________________________________________________
Emmanuel DELOGET [pixel] pixel@{dotcom.fr,epita.fr}  ----  DotCom SA
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