bug#49921: go-1.16 build failing on aarch64: "fatal error: runtime.newosproc"

[Sarah Morgensen <iskarian@mgsn.dev>]

Sarah Morgensen <iskarian@mgsn.dev> writes:

> Hello Guix,
>
> I just noticed go-1.16 is failing on aarch64 [0]. I am not having any
> success tracking down the cause. It looks like the error is the same as
> was happening for go-1.14 circa 11 Mar [1], which was fixed by 9 Apr
> [2], but I cannot tell what resolved the issue. I've attached the
> relevant part of the build log; the full log is available at [0].
>
> Any ideas?
>
> [0] https://ci.guix.gnu.org/build/949823/details
> [1] https://ci.guix.gnu.org/build/71004/details
> [2] https://ci.guix.gnu.org/build/19478/details
>
> starting phase `build'
> runtime: failed to create new OS thread (have 2 already; errno=22)
> fatal error: runtime.newosproc

I think this might be related to [0], although if it's true that CI uses
native builders for aarch64 now, I have no idea.

I've been able to reproduce this with both go-1.14 and go-1.16 when
building with --system=aarch64-linux from an amd64 system.  I tried to
apply the patch in the thread I mentioned, but go-1.4 won't build at all
with QEMU.

[0] <https://github.com/golang/go/issues/20763> runtime: cannot run
cross compiled ARM binary on QEMU

--
Sarah