MIME-Version: 1.0
From: Roman Shaposhnik <roman@zededa.com>
Date: Fri, 23 Apr 2021 20:14:55 -0700
Message-ID: <CAMmSBy8PSwvk0krVHtf9k19-dRFa8xYKufb+ATmbswDoRNG-5Q@mail.gmail.com>
Subject: Alpine for riscv64
To: ~alpine/devel@lists.alpinelinux.org
Content-Type: multipart/mixed; boundary="0000000000008f61c605c0af5166"

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Hi!

long time lurker (and user of Alpine in Linux Foundation's Project EVE)
first time poster here!

Over at Project EVE we're now embarking on a riscv64 port
and it would be super helpful if Alpine had that architecture supported.

Since that's not that case, I started looking into it by using
aports/scripts/bootstrap.sh
and I have few things to report back.

First good news -- after some small amount of patching of aports
I was able to run the script and get myself a riscv64 build environment.
I'm attaching the changes I had to make to accomplish this. These
are mostly workaround and I'd love to collaborate with folks interested
in riscv64 to at least clean these things up.

The workarounds are roughly in the following categories:
   0. stale config.sub (what's an Alpine way of dealing with this?)
   1. nghttp2 binary that is generated with TEXT relocations (not sure
what to do here)
   2. failing to recognize a proper riscv64-alpine-linux-musl so I
have to force riscv64-linux-musl

And finally, here's the most interesting part in all of this -- it turns out
that an initial gcc is lacking libatomic.so and thus a few packages fail.
In order to workaround it I had to:
    1. restructure bootstrap.sh slightly so that a proper gcc gets built
    2. once #1 happens we add gcc and libatomic to build deps
Not sure what's up with this and would love to know if there's a simpler way.

In general, as I said -- I'd love to know if anyone else is also interested
in riscv64 port and what's the best way to collaborate on that.

Thanks,
Roman.

P.S. If you're curious what my next steps are - for EVE I need these
packages:
     https://github.com/lf-edge/eve/blob/master/pkg/alpine/mirrors/3.13/main

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