Fix static linking issue encountered during stable build

[dipinhora]

• Ensure that -latomic comes after -static to fix static linking

• Allow overriding -fuse-ld command for linking

[dipinhora]

@SeanTAllen it would be ideal if you were able to test with these changes prior to merging. In my limited testing, when using clang on Alpine you don't need to override the ld used but when using gcc you need to ensure the ld is not gold by using the newly added --link-ldcmd argument to ponyc.

[SeanTAllen]

@dipinhora what should the --link-ldcmd be when used with gcc?

[dipinhora]

@SeanTAllen depends on your environment. Most have bfd (the thing that gold superseded). Or you can try lld instead if you have that installed.

[SeanTAllen]

@dipinhora circleci tests arent running for some reason for this PR (and for your last one). Not sure why.

[dipinhora]

@SeanTAllen they're running. They are linked to my personal circleci account setup so they don't show on the PR. It's very annoying actually.

[SeanTAllen]

@dipinhora that's weird and new. @EpicEric opened a PR earlier from a forked repo and it showed up here.

[dipinhora]

@SeanTAllen re: circleci... i was wrong.. they used to run.. now they're stuck with a "needs setup" (see: https://circleci.com/gh/dipinhora/workflows/ponyc). Very annoying.

I'll do a force push to get circleci to pick it up as part of the PR so it works correctly I hope.

[SeanTAllen]

@dipinhora you might need to turn on using version 2.1/pipeline features under advanced settings for them to work.

[dipinhora]

@SeanTAllen re: PRs from other folks. It depends on whether they have circleci setup to do their own personal building outside of the ponylang PRs or not. It's a very annoying quirk.

[dipinhora]

@SeanTAllen is this error (https://circleci.com/gh/dipinhora/ponyc/9449; note, this is on a test branch) expected after turning on the pipeline feature thing?

[SeanTAllen]

@dipinhora you'll apparently need to turn on the orb feature as well. For the ponylang org, its under the org settings under "Security".

[dipinhora]

@SeanTAllen new error: https://circleci.com/gh/dipinhora/ponyc/9451. I think I'm going to delete the ponyc project from my circleci config so PRs work again and maybe figure this out at some point in the future.

[dipinhora]

@SeanTAllen it seems my deleting ponyc from circleci fixed the PR circleci not building issue.

[dipinhora]

@SeanTAllen nevermind. spoke too soon. any idea how to fix that error?

[SeanTAllen]

Thanks @dipinhora