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Re: Conditional append
Shaun Jackman <sjackman@gmail.com> writes:
> Thanks Stepan. I'm going to go with your latter suggestion, since it
> doesn't require modifying all the other Makefile.am. This seems like a
> rather arbitrary limitation of automake though. Is there any reason
> why the append operator shouldn't treat an undefined variable as
> empty?
I wish it would. IMO, the current behavior violates the principal of
least surprise.
ACE & TAO use MPC (Make Project Creator) to generate Makefile's,
Makefile.am's, MSVC++ project files, etc. from a common set of *.mpc
files. MPC's automake module has a lot of otherwise unecessary code
to track whether a given automake principal has been output in order
to use "=" or "+=".
All that cruft could be removed if automake interpreted "+=" of a
previously unseen variable as an assignment.
--jtc
--
J.T. Conklin