(enh) Build for Linux on ARM.

[glennj]

cc does not have a -m64 option on ARM

[glennj]

There's no github workflow for arm. Here's proof:

$ uname -a
Linux exercism-vm 5.15.0-113-generic #123-Ubuntu SMP Mon Jun 10 08:16:46 UTC 2024 aarch64 aarch64 aarch64 GNU/Linux

$ python3 util/test.py
(bin/wrenc) Passed: 96 Failed: 0 Skipped: 4 Path

  ✅ should normalize
  ✅ detect root
  ✅ navigate paths
  ✅ join
  ✅ dirname
  ✅ split
  ✅ windows

Tests:  💯 ✓ 7 passed, 7 total

Runtime

  ✅ have class level constants
  ✅ have details
  ✅ assertVersion
  ✅ have capabilities
  ✅ allow querying capabilities

Tests:  💯 ✓ 5 passed, 5 total

All 99 tests passed (275 expectations).
Skipped 3 tests: 
Skipped 1 tests: Windows

[joshgoebel]

Does GitHub have a builder for this architecture?

[glennj]

Not for free, it looks like:

In addition to the standard GitHub-hosted runners, GitHub offers customers on GitHub Team and GitHub Enterprise Cloud plans a range of managed virtual machines with advanced features - for example, more cores and disk space, GPU-powered machines, and ARM-powered machines.

https://docs.github.com/en/actions/using-jobs/choosing-the-runner-for-a-job

[joshgoebel]

So this is all just to remove -m64... does Make have anyway to just detect the architecture or add a conditional so the single makefile would work on any Linux?

[glennj]

@joshgoebel got it. Now only adds the -m64 option on x86_64 machines.