libunwind: add a patch to address a problem with Julia

[abbradar]

JuliaLang/julia#3469. Should be beneficial to other LLVM-JIT+libunwind projects as well (e.g. Pyston). I suppose we want this in staging first.

[abbradar]

Do we want this in release-15.09? If yes, to what branch should I commit this first? If not, would staging-post-15.06 be good enough?

cc @ttuegel @7c6f434c (Julia maintainers), @vcunat (last person who touched libunwind)

[wkennington]

Use the regular staging branch if it really affects that many targets and
then we can eventually Cherry pick to the release. Post-15.06 was
intentended for dramatic changes not to be tied up in this release.

On Thu, Sep 3, 2015, 17:40 Nikolay Amiantov [email protected]
wrote:

Do we want this in release-15.09? If yes, to what branch should I commit
this first? If not, would staging-post-15.06 be good enough?

cc @ttuegel https://github.com/ttuegel @7c6f434c
https://github.com/7c6f434c (Julia maintainers), @vcunat
https://github.com/vcunat (last person who touched libunwind)

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#9634 (comment).

[abbradar]

Got it, then let's just push this to the staging now and cherry-pick to the release-15.09 later if we decide it's worth it.

[vcunat]

Yes, I think the same.