Hi Iain,
>>> Hrm, this needs more investigation, and will affect 10.10 too, since xc7 is
>>> the default there.
>>> (separate issue, let’s start a new PR, or at least a new thread).
>>
>> right, but it's only an issue if you switch assemblers (or linkers) used
>> by gcc without rebuilding. This has never been safe on any platform.
>
> The issue that worries me is that the new assembler supports .cfi_xxx
> (YAY!), but the Darwin port is not 100% ready for it yet (BOO!) (I have
> patches, and expect to make them available for folks to try in the next ~ 2
> weeks). However, still not sure that they would exactly be stage3 stuff.
ah, I see. The platform maintainers have some leeway even in stage 3,
so let's see when you post the patches.
> Did you say that bootstrap fails if -Q is jammed in everywhere?
> (that would be a short-term safety net, falling back to the cctools
> assembler).
Yes, but only if you run the configure test with the LLVM assembler, but
always call as -Q during the build. It should be possible to perform
the assembler tests with as -Q instead, so there shouldn't be an
inconsistency and you get the same result as if configuring with a copy
of the Xcode 6.4 as.
Rainer
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Rainer Orth, Center for Biotechnology, Bielefeld University
