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Re: [PATCH]: Remove CONFIG_BUILD_ELF64 entirely

To: "Maciej W. Rozycki" <macro@linux-mips.org>
Subject: Re: [PATCH]: Remove CONFIG_BUILD_ELF64 entirely
From: Ralf Baechle <ralf@linux-mips.org>
Date: Mon, 26 Mar 2007 13:34:45 +0100
Cc: Thiemo Seufer <ths@networkno.de>, Kumba <kumba@gentoo.org>, Linux MIPS List <linux-mips@linux-mips.org>
In-reply-to: <Pine.LNX.4.64N.0703261257590.16083@blysk.ds.pg.gda.pl>
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On Mon, Mar 26, 2007 at 01:09:37PM +0100, Maciej W. Rozycki wrote:

> 
>  Hmm, from the back of my head I think it should not be a problem -- IIRC 
> the versions of GCC that did not support explicit relocs for 64-bit ELF 
> would force "-mno-explicit-relocs" internally even if asked otherwise.  
> They did not support "-msym32" either, which went in later, and then 
> non-PIC support for 64-bit explicit relocs went in earlier than for PIC -- 
> quite unsurprisingly, as %higher() and %highest() are not necessarily 
> rocket science unlike %disp() and friends.
> 
>  If anybody cares I could probably make the excavations needed to verify 
> the above.

That would be appreciated.  I did that on my side, I also tried to build
a few 64-bit test kernels with gcc 3.3 and 4.1.2 yesterday and did not
find any real reason why we would still need -mno-explicit-relocs.  Thiemo
said there was something like a modern gcc in combination with old
binutils.  That's the comination I haven't tested.

  Ralf

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