osx-arm64 needs to be built from source

[msarahan]

Solution to issue cannot be found in the documentation.

• I checked the documentation.

Issue

I gave up on cross-compiling in #10 and used a binary repack. It would be better to build from source somehow - either fix the cross-compiling or build on native Apple Silicon if/when it is available.

Installed packages

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Environment info

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[msarahan]

linux-aarch64 added in #49

[mdekstrand]

linux-aarch64 cross-compile added in #68 so we can actually publish packages (since Travis keeps tipping over).

This does require disabling V8 snapshotting, which doesn't work in a cross-build (although there is a modified version of Cargo that can turn it back on, at least for Linux targets). This comes with a small performance hit at startup (imperceptible in my tests).

[mdekstrand]

Cross-building is even harder than it looks — the initial cross-build produced binaries with a couple of problems in the build architecture baked in to the binary.

I fixed this in #82, but it won't work on OSX. Deno really doesn't support cross-compilation, and I'm pretty sure the cargo-cross-build hack won't work on OSX since Rosetta only translates x86_64 to ARM, not the other way around. denoland/deno#13948 and comments document some of the things needed to support cross-compilation.

[mdekstrand]

I've opened another issue (denoland/deno#27496) on cross-compilation support for Deno, which will help the linux-aarch64 situation but still not osx-arm64. I think the bet there is to wait until Conda-Forge supports native Apple Silicon build runners (I think they are in experimental support, I have seen some feedstocks using Github Actions for builds, but it is not officially supported).