[LLVMdev] unwind's permanent residence

[C Bergström]

On Wed, Apr 22, 2015 at 5:12 PM, Renato Golin <renato.golin at linaro.org> wrote:
> On 22 April 2015 at 03:40, Saleem Abdulrasool <compnerd at compnerd.org> wrote:
>> So after a bit of a hiatus (sorry, other stuff has been eating up my free
>> time), Id like to pick this up again.  I think that its a matter of just
>> copying the unwind sources into the right place.  Im hoping to do this
>> sometime this Friday (or perhaps Saturday).  Any objections?  I can probably
>> try to take a stab with the CMake side of things once the repo is copied
>> over.
>
> Hi Saleem,
>
> Thanks for looking at it again, this may simplify the FreeBSD usage of
> compiler-rt a lot (they still use libgcc_s/eh with it).
>
> I imagine that copying the files will be the simple part. More complex
> will be to make sure that they're built in the same way (so updating
> both CMale files to add/remove logic), and making sure to move all
> tests and get them to run when you do a make check on compiler-rt.
>
> However, the worse part will probably making sure that both
> compiler-rt and libc++abi have unwind for a period of time, to allow
> everyone to migrate whatever they do, and only kill it after a period
> of time. I'd vote for not having a release with the unwinding code on
> both places, but having them in trunk for a month or so, with weekly
> warnings will probably help a lot people that rely on it.

No way - that would be super confusing at best. "they" will have to
migrate eventually and the sooner that clean cut happens, the better.
Having a release with both would be a nightmare.