[gobolinux-devel] Use flags specification

[Daniele Maccari]

Hisham wrote:
> On Sat, Apr 12, 2008 at 2:16 PM, Daniele Maccari <gobo.users at gmail.com> wrote:
>   
>> Hisham wrote:
>>  > On Sat, Apr 12, 2008 at 11:01 AM, Daniele Maccari <gobo.users at gmail.com> wrote:
>>  >
>>  >> Jonatan Liljedahl wrote:
>>  >>  > Or something like this:
>>  >>  >
>>  >>  > with_gtk1=(
>>  >>  >   "--enable-gtk"
>>  >>  >   "--disable-gtk"
>>  >>  > )
>>  >>  >
>>  >>  > or more self-documenting:
>>  >>  >
>>  >>  > useflag_gtk1=(
>>  >>  >   "with=--enable-gtk"
>>  >>  >   "without=--disable-gtk"
>>  >>  > )
>>  >>  >
>>  >>  > Those would be easy parsable by bash itself...
>>  >>  >
>>  >>  Sure, the possibilities are infinite :D
>>  >>
>>  >
>>  > True, but all the proposed variations just lighten the cumbersomeness
>>  > in a syntactic manner. The problem is not the size of each entry but
>>  > the number of entries and the implied maintenance issues. I find the
>>  > approach Michael described in his original post to be a good
>>  > compromise. And the $with_* variables scheme is especially smart!
>>  >
>>  > -- Hisham
>>  That's true too, so a question arises: is there some simple way to do this?
>>     
>
> To do what Jonatan asked for? I believe there isn't. The alternative
> is to use ChrootCompile to make controlled builds of packages.
> ChrootCompile should probably be enhanced with some knowledge about
> how to handle these optional dependencies, but the biggest missing
> block was to be able to tell recipes how to be behave on the presence
> of these optional deps, and now we have that.
>
> -- Hisham
>   
Well, but even having recipes able to handle use flags, it remains the 
fact that a configure
script, when run, would find every possible dependency, be it included 
or not in the user's
whitelist . So they would need to be disabled somehow, quite awkward.
The better solution, as you said, would probably be to use ChrootCompile 
to insulate the
compilation process, bringing in only what's needed. Anyway I don't know 
its internals and
how and if this could be easily done.

Just out of curiosity, how does gentoo handle such things? One billion 
lines "recipes"?