Re: [gentoo-dev] Getting proper USE_EXPAND variable(s) for multilib

[Thomas Sachau]

Michał Górny schrieb:
> Hello,
>
> There is a fair interest in multilib and while still early, it would be
> a good moment to decide on how USE flags to use for it.
>
> The current attempts are mostly using USE=multilib which is not really
> expressive and poor. What I would go for is a clear variable specifying
> which targets package is built for.
>
>
> This raises the following questions:
>
> 1) do we want the default ABI to be switchable?
>
> 2) do we want irrelevant ABIs to be visible to emerge users?
>
> By 2) I mean: do we want the users to see stuff like:
>
>   MULTILIB_ABIS="amd64_abi1 amd64_abi2 -amd64_abi3 (-ppc64_abi1)
>     (-ppc64_abi2) (-ppc64_abi3) ..."
>
> or just the relevant part.
>
> To be honest, I don't know if there's other way to hide USE flags than
> using USE_EXPAND_HIDDEN. If we want to use that, we'd have to split
> the flags per-arch, i.e. have:
>
>   MULTILIB_AMD64="abi1 abi2 abi3"
>   MULTILIB_PPC64="abi1 abi2 abi3"
>
> with appropriate USE_EXPAND_HIDDEN set by profiles.
>
>
> What are your thoughts? Which arches would like to use multilib? What
> names for ABIs do you suggest?
>

So you want to re-implement multilib-portage in an eclass without the
additional benefits a package-manager level implementation has?

-- 

Thomas Sachau
Gentoo Linux Developer