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Re: [wwwdocs] Add info about IPA optimization and LTO improvments

From: Andi Kleen <andi at firstfloor dot org>
To: Jan Hubicka <hubicka at ucw dot cz>
Cc: Andi Kleen <andi at firstfloor dot org>, gcc-patches at gcc dot gnu dot org, gerald at pfeifer dot com, mjambor at suse dot cz, hjl dot tools at gmail dot com
Date: Mon, 26 Sep 2011 16:59:27 +0200
Subject: Re: [wwwdocs] Add info about IPA optimization and LTO improvments
References: <20110921095325.GC6165@kam.mff.cuni.cz> <m2zkhshteb.fsf@firstfloor.org> <20110926094642.GA30993@kam.mff.cuni.cz>

> > <li>ld -r is now supported with LTO</li>
> 
> Thanks, forgot about this one.  This also needs support at linker side, right?

Only if you include assembler or non LTO code.
Without that it should work with any linker.

> Do you know minimal GNU ld/Gold versions that works fine?

I believe the assembler code only works with HJ's version of binutils
and his BFD ld (not gold) currently. HJ can you supply the minimal version?
Non assembler/LTO should work always.

I hope both gold and normal binutils ld will eventually get the support
too.

-Andi
-- 
ak@linux.intel.com -- Speaking for myself only.

Follow-Ups:
- Re: [wwwdocs] Add info about IPA optimization and LTO improvments
  - From: H.J. Lu

References:
- [wwwdocs] Add info about IPA optimization and LTO improvments
  - From: Jan Hubicka
- Re: [wwwdocs] Add info about IPA optimization and LTO improvments
  - From: Andi Kleen
- Re: [wwwdocs] Add info about IPA optimization and LTO improvments
  - From: Jan Hubicka

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