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Building libraries 101

From: Brendan Heading
Subject: Building libraries 101
Date: Thu, 26 May 2005 21:50:27 +0100
User-agent: Mozilla Thunderbird 1.0.2 (Windows/20050317)


Here's what probably a dumb question. Say I've got a bunch of libraries to build. At present I'm doing :

libfoo.a: $(FOO_OBJS)
        $(AR) ...

libbar.a: $(BAR_OBJS)
        $(AR) ...

and I have to repeat that sequence for each library. If I've got 50 libraries, it seems like a lot of repetition to essentially keep saying the same thing. Is there any way I can state my build rules for libraries more concisely ?

I can do one optimization like :

libbar.a: $(BAR_OBJS)

and set AR_FUNCTION to be my $(AR) ... command line. That way at least I define the linker commands in only one place.

Any suggestions ?

a couple of ideas .. can I specify the same rule twice ? ie in one part of the makefile have the prerequisites defined :


and then in another part of the makefile have a generic rule that determines what must be done to satisfy a build, ie

        $(AR_COMMAND) ...



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