On Sun, Oct 18, 2009 at 10:26:37PM -0400, Mike Frysinger wrote: > On Sunday 18 October 2009 14:49:09 Thomas Sachau wrote: > > Robin H. Johnson schrieb: > > > On Mon, Oct 12, 2009 at 04:50:23PM -0400, Mike Frysinger wrote: > > >> what exactly does this "lib32" do ? naming USE flags according to > > >> specific ABI implementations is a bad idea. you have to forget special > > >> casing anything to "lib32 vs lib64". amd64, while the most common, is > > >> hardly extensible. we must handle multiple ABIs which easily might have > > >> the same bitsize. > > > > > > The canonical example for this does still remain MIPS I believe. > > > > > > The most common ABIs in MIPS are: > > > o32, n32 - Both in Gentoo releases > > > n64 - Was experimentally done in Gentoo > > > (default-linux/mips/2007.1-dev/generic-be/n64) o64, eabi, meabi, nubi - > > > Not sure if they were were ever released in any way. > > > > > > Crossdev DOES support the full swath of these last I checked it. > > > > There is a difference between creating a toolchain and supporting all > > packages for that arch and every possible ABI you can crosscompile. > > > > Currently i only support amd64 since thats the only ARCH i know and have > > access to. If i get enough details to implement other ARCHes and some way > > to test it there, i might try it for those other ARCHes too. > we're not asking you to implement support for these ABIs, just to keep in > mind > that any implementation that does not scale and/or hardcodes to a single set > of ABIs isnt a proper solution My main objection thusfar is hardcoding the names as lib64/lib32.
Is there any specific reason you're using the content of the
LIBDIR_${ABI} variable? Maybe using the $ABI string as the USE flag
would be better, in some form of USE_EXPAND manner (cannot use them raw
as I believe we still have some code in the form of 'use $ARCH', which
might not behave sanely if say both amd64 and x86 were set.
Egs:
multilib AMD64:
USE="abi_x86 abi_amd64"
Multilib PPC64:
USE="abi_ppc abi_ppc64"
Multilib MIPS (SGI hardware)
USE="abi_n32 abi_n64"
Possible valid multilib sets on MIPS are:
[n32,n64] - at least one Gentoo system like this has been built.
[o32,o64]
[eabi,meabi] - docs fuzzy
[nubi]
--
Robin Hugh Johnson
Gentoo Linux: Developer, Trustee & Infrastructure Lead
E-Mail : robb...@gentoo.org
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