Re: i486 emu in mainline?

P
2004-05-24T09:12:17Z

Willy Tarreau wrote:
> On Sun, May 23, 2004 at 06:51:30AM -0400, Joseph Fannin wrote:
>
>>On Sun, May 23, 2004 at 10:29:12AM +0200, Willy Tarreau wrote:
>>
>>>On Sun, May 23, 2004 at 01:40:59AM +0200, Christoph Hellwig wrote:
>>>
>>>>These days gcc uses i486+ only instruction by default in libstdc++ so
>>>>most modern distros wouldn't work on i386 cpus anymore. To make it work
>>>>again Debian merged Willy Tarreau's patch to trap those and emulate them
>>>>on real i386 cpus. The patch is extremely non-invasive and would
>>>>certainly be usefull for mainline. Any reason not to include it?
>>
>>> - I couldn't emulate locks, so this will break on SMP systems, and so
>>> will it if you need to access some memory share with an external
>>> microcontroller or something like that.
>>
>> Does this mean that programs that use the NPTL will work on
>>non-SMP 386s?
>
> I have no idea. Why would NPTL not work on i386 ?

i386 doesn't have the necessary instructions.
It's my understanding that the following is not being maintained:
http://sources.redhat.com/ml/libc-hacker/2004-05/msg00019.html

Pádraig.