Zipline JVM artifacts assume Macs are X64

[swankjesse]

I’m getting failures like this from our internal releases:

> /private/var/folders/6n/t4d4n1c506d9m_l6t331gftm0000gn/T/quickjs12749920372263119972.tmp: dlopen(/private/var/folders/6n/t4d4n1c506d9m_l6t331gftm0000gn/T/quickjs12749920372263119972.tmp, 0x0001): tried: '/private/var/folders/6n/t4d4n1c506d9m_l6t331gftm0000gn/T/quickjs12749920372263119972.tmp' (mach-o file, but is an incompatible architecture (have 'x86_64', need 'arm64e')), '/usr/lib/quickjs12749920372263119972.tmp' (no such file)

[JakeWharton]

Yes we don't build ARM for any OS and have merely relied on having zero Windows ARM users and zero Linux ARM users. I guess Apple broke the camels back.

There are no Mac ARM Action workers (actions/runner-images#2187), but hopefully the Zig C cross-compiler support that Ive been meaning to rewrite our builds to use can target ARM (for all three OS's).

[JakeWharton]

When it comes to macOS, Zig even has a custom built linker able to cross-compile for both Intel and Apple Silicon M1, something that not even lld (LLVM's linker) can do.

Hell yessss

[swankjesse]

This seems to work?
#419

[swankjesse]

Small wrinkles in #419 that I’m not very happy with:

• How do I test GitHub actions??
• The archicture used by M1 Macs is aarch64 in the JVM’s os.arch, but arm64 in cmake, so we need a mapping.
• Duplication between build.yml and release.yml

[JakeWharton]

Actions run on every commit. No need to make a PR.

[JakeWharton]

$ zig build && file zig-out/lib/libquickjs.dylib
zig-out/lib/libquickjs.dylib: Mach-O 64-bit dynamically linked shared library x86_64

$ zig build -Dtarget=aarch64-macos-gnu && file zig-out/lib/libquickjs.dylib
zig-out/lib/libquickjs.dylib: Mach-O 64-bit dynamically linked shared library arm64

Still a ~day's worth of work here but Zig's cross-compilation game is strong. In theory I can build both of those targets from a linux action so we can eliminate the matrix build, too. And hopefully add Windows support.

[JakeWharton]

@swankjesse is this fixed? I'd still love to land Zig, but I haven't had time to play with it.

[swankjesse]

Fixed.