Re: F35 Change: CompilerPolicy Change (System-Wide Change proposal)

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On 4/24/2021 8:26 AM, Michael Catanzaro wrote:
On Fri, Apr 23 2021 at 08:01:03 PM +0200, Jakub Jelinek <jakub@xxxxxxxxxx> wrote:
I'll be probably repeating myself, but the two compilers are known to be
ABI incompatible in very important ways, none of the
https://bugs.llvm.org/buglist.cgi?quicksearch=42439%2C19909%2C44228%2C12207 bugs have been touched since last time this was discussed and I'm not aware
of any ABI compatibility testing between the two compilers.
So if some library packages switch compilers and programs using those
libraries don't or vice versa, this proposal has quite high risks of
introducing hard to debug debugs.

Perhaps this proposal should be revisited in the future when there are fewer scary ABI bugs.

That's not really a scary ABI bug.   There's disagreement about a fairly unusual case involving extension of 8 bit arguments and some issues with 128 bit types.  I wouldn't consider either a show stopper for this proposal.


jeff

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