Re: Automake 1.14 and subdir-objects

[David Beer]

Gavin,

I am going to test out and see if the BUILT_SOURCES option works. Making a
single Makefile would not be an option as there are over 500 Makefiles in
my project and combining them into one would not be maintainable.

I'm curious though - am I really the only person having this issue? How are
people using unit tests with the new version of automake? It would seem
that these changes make it very difficult for anyone who has unit tests in
their project.


On Thu, Jul 31, 2014 at 4:21 PM, Gavin Smith <address@hidden>
wrote:

> 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/Makefile.am:
> >
> > a_SOURCES = bob.c tom.c
> >
> > src/b/Makefile.am:
> >
> > 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 Makefile.am. 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 Makefile.am'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 Makefile.am if it is
> appropriate for your project.
>
> Another idea is to specify the files like tom.c in "src/b/Makefile.am" as
>
> BUILT_SOURCES=tom.c
>
> and then have a hand-written rule to copy the tom.c file into the
> build directory for b, e.g.
>
> tom.c:
>         cp $(top_builddir)/a/tom.c .
>
> (I haven't tested this.)
>



-- 
David Beer | Senior Software Engineer
Adaptive Computing