[alpine-aports] Package request for libunwind v1.2 with aarach64 support

Adeel Mujahid
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Hello,

Use case: We are in the process of ARM64 bring up for .NET Core: https://github.com/dotnet/coreclr/issues/8927

Description:

v1.2 of libunwind is recently released.
Announcement: https://savannah.nongnu.org/forum/forum.php?forum_id=8775 (release date: 13 Jan 2017)

v1.1 was released in Oct 2012, a lot of improvements have been made to the core lib since. :)

The aports doesn't support aarch64 for libunwind at the moment. Unfortunately, libunwind v1.2 of didn't included one imperative patch for aarch64 https://github.com/libunwind/libunwind/commit/cf6382643efd133e617c2cf1dba7e53868ccd690 (getcontext for aarch64)

It would be really nice if the tip of the master: https://github.com/libunwind/libunwind/commit/316a34a36ed203483399ec68c94d1688132c1be9 is packaged which enables the aarch64 support and ultimately we get:

- arch="x86_64 armhf"

+ arch=all

in https://github.com/alpinelinux/aports/blob/master/main/libunwind/APKBUILD

Thanks!

-- best
Adeel