Jos Vos wrote :
> On Mon, May 22, 2006 at 10:09:57AM +0200, Christian Joensson wrote:
>
> > darn, I was afraid that that was the case... just to conclude, I
> > would have needed it, but I guess that's the rpm ideal, everything in
> > the spec file, not much command line or environment settings that
> > override the spec file. is this perception of mine
>
> You can not override the spec file, but you can still replace
>
> %define build_ada 1
>
> in the spec file by something like
>
> %define build_ada %{?my_build_ada}%{?!my_build_ada:1}
>
> (untested), which would mean that "1" is taken when you don't
> define "my_build_ada", or the value of %{my_build_ada} when you
> define it on the command line with
>
> --define 'my_build_ada 0'
>
> As said, it's untested, as I'm not sure about whether the
> evaluation of %{?!my_build_ada:...} actually works when the
> value is zero.
The cleanest is probably :
%define build_ada 0%{!?_without_ada:1}
Which will evaluate to 01 if you don't have _without_ada and to zero if
you do have it defined.
To disable ada you then just pass "--without ada" to rpmbuild, and ada
being enabled still is the default.
Matthias
--
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