os: net.newUnixFile

[leongross]

Building the u-root cmdlet sluinit with my experimental net PR #4498 following error occurs:

/usr/local/go/src/net/fd_unix.go:205: linker could not find symbol net.newUnixFile

This PR resolves the issue of the missing function net_newUnixFile and links it into the net package.

Since this package implements functionality for the linux net package, this code can currently not really be tested (see #4498).

[leongross]

@aykevl @deadprogram @dgryski

[leongross]

Since the wasm CI seems to be broken in other PRs not touching this as well, I presume this PR did no changes to crash it (see #4521)

[leongross]

@ydnar

[deadprogram]

The fix for nix is in... or at least for the CI. Please rebase against latest dev.

[leongross]

@deadprogram @aykevl ci is green now, would appreciate a review

[dgryski]

Approving to allow this to be merged and not block the net stuff, but I have concerns that we're drifting from Go's requirements for this function.

[deadprogram]

Thanks for the addition @leongross and to @dgryski and @rminnich for review. Now merging.

[leongross]

I am aware of your concerns @dgryski and I think they are valid. This is just a POC workaround, as @aykevl already pointed out somewhere in the near future we have to consider our own implementation of the internal/poll package. But for now the stub is very helpful, thanks also to @rminnich

[deadprogram]

Not sure why, but the Windows CI is now failing consistently after this PR was merged, even though the PR itself was passing.

See https://github.com/tinygo-org/tinygo/actions/runs/11408347958/job/31767355704#step:17:587

I have restarted it already 3 times...

Any ideas?

[deadprogram]

It finally got thru the first step. Seems like some race condition and not related to this PR. Sorry about the noise.