Xcode bug (was: pymol crashing under Qt on Catalina)

[Ken Cunningham]

> On Oct 13, 2019, at 7:26 AM, Joshua Root <jmr at macports.org> wrote:
>>>> 
>>> 
>>> Ah, good to know. Do you have a link to Jeremy's statement out of curiosity?
>> 
>> No I don’t, I only know this second hand from a comment by Ken...
> 
> Ken? 


> Hey Ken,
> 
> There's a bug in Xcode 11's llvm that is biting gmp.  Homebrew folks just confirmed for me that using -fno-stack-check (adding it to CFLAGS) works around the issue.
> 
> Would you mind doing the legwork of getting that into MacPorts, conditional on Xcode 11.0 (and maybe do 11.1 as well to be safe even though it doesn't exist yet ... I am uncertain whether or not it will be fixed for that update, so best to be safe).
> 
> Thanks,
> Jeremy


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