Re: [PATCH] libc/uClibc: add workaround patch for ICE in m68k builds

[Esben Haabendal <esben dot haabendal at dev dot prevas dot dk>]

Esben Haabendal <esben.haabendal@dev.prevas.dk> writes:

> "Yann E. MORIN" <yann.morin.1998@free.fr> writes:
>
>> Esben, All,
>>
>> On Friday 28 September 2012 14:47:56 Esben Haabendal wrote:
>>> "Yann E. MORIN" <yann.morin.1998@free.fr> writes:
>>> > Then, naybe it's gcc-4.6.3 (and earlier? maybe up to 4.7.1?) that should
>>> > be fixed, instead.
>>> 
>>> Yes, but it don't know what fixed this in 4.7.2, so it is an uphill
>>> battle backporting this to all older GCC releases.
>>
>> Yep, that can be tedious...
>>
>> Let's say that at least gcc-4.7.2 is required for m68k, then.
>>
>>> > I've updated your sample to use 4.7.2 instead of 4.6.3. I have no way to
>>> > test m68k noMMU; could you give it a spin, please?
>>> 
>>> I will.
>>> 
>>> Late yesterday, I unfortunately found another ICE issue (in 4.7.2). It
>>> has already been reported:
>>> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53833
>>
>> That bug report contains a one-liner patch. Not sure it is valid, but at
>> least that's a starting point.
>
> The patch removes the atomic ops.  Not really a proper fix...
>
> I'd rather use an older gcc with optimization disabled in uClibc.

Or does gcc detect this automagically, so that there is no problems in
just leaving them out?

/Esben

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