Re: [gentoo-dev] [RFC] Ability to pass arguments to src_configure/src_compile

[Vaeth <vaeth@mathematik.uni-wuerzburg.de>]

Santiago M. Mola wrote:
> Vaeth <vaeth@mathematik.uni-wuerzburg.de> wrote:
> >
> > [...] The suggestion violates in an extreme way the golden design
> > rule that small changes in effect should require small changes in source.
[...]

> Yes, you're right. That would  be really tedious and stupid... but
> we're lucky, and EAPI-2 introduced the 'default' function. So if you
> need to do a small change not covered by this method, you just define
> the phase, make the little change, and then call the 'default'
> function. Clean and simple.

How does this "little change" look like if you have to call ./autogen.sh
instead of ./configure?  Or if you want to call a second ./configure
in some subdirectory with the same options but one option changed?

These are just some examples, I hope that the point becomes clear:
You simply cannot cover all natural modifications which might be
necessary unless you really can access the commands themselves;
and for this reason it is wise IMHO to have default functions which are
as short as possible (and which are in particular not dealing with
complex implicit array arguments).