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Re: Automake 1.14 and subdir-objects

From: Gavin Smith
Subject: Re: Automake 1.14 and subdir-objects
Date: Thu, 31 Jul 2014 23:21:19 +0100

On Thu, Jul 31, 2014 at 9:32 PM, David Beer <address@hidden> wrote:
> Gavin,
> Thanks for your reply. Here's a more specific breakdown of what the project
> does:
> src/a/
> a_SOURCES = bob.c tom.c
> src/b/
> b_SOURCES = mary.c ../a/tom.c
> The purpose was so that tom.c would be recompiled with a different
> preprocessor switch. There were only a few files that failed for this case,
> so I was able to work around this. The other case:
It is clearer now what you are trying to do. It might be worth noting
that you can specify target-specific compliation flags with variables
like a_CPPFLAGS and b_CPPFLAGS: however, this would normally be done
when a and b were targets defined in the same This would
lead the created object files to have different names, so might work
in your case, but I believe that this kind of sharing of source files
between's is not really supported. I imagine there could
be problems with e.g. dependency tracking. Maybe consider using a
"non-recursive" build system with a single if it is
appropriate for your project.

Another idea is to specify the files like tom.c in "src/b/" as


and then have a hand-written rule to copy the tom.c file into the
build directory for b, e.g.

        cp $(top_builddir)/a/tom.c .

(I haven't tested this.)

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