Downgrade GMP to 6.2.1 due missing symbols

[luislavena]

Appears when combined with Zig for cross-compilation, v6.3.0 of GMP reports missing symbols when targetting x86_64 and aarch64 Linux musl.

This is not present when cross-compiling to macOS versions or when compiling natively (using cc from hydrofoil-crystal), which is even weirder considering that hydrofoil-crystal 1.11 and 1.12 already uses v3.19 of Alpine as base and that was already using GMP v6.3.0.

Downgrading until I can investigate this further.

cc @zw963

[zw963]

It works, thank you!

[zw963]

One more advice about gem update.

Since we drop version from macOS targets, Can we use same name as Crystal target name instead?

Rename:

x86_64-apple-darwin -> x86_64-darwin
aarch64-apple-darwin -> aarch64-darwin

Because the left linux target name same as Crystal target too, this will be more consistent.

[luislavena]

I'm not sure I understand your request: the Linux target is arch-linux-musl. The macOS target is arch-apple-darwin and that is what is passed to Crystal as platform.

[zw963]

I'm not sure I understand your request: the Linux target is arch-linux-musl. The macOS target is arch-apple-darwin and that is what is passed to Crystal as platform.

Please check Crystal platform definition in official document. (check following screenshot too)

there is no -apple- in the middle for the macOS target

[luislavena]

@zw963 that seems inconsistent to what crystal version and the platform triplet processing does:

$ crystal version
Crystal 1.12.1 (2024-04-11)

LLVM: 18.1.4
Default target: aarch64-apple-darwin23.4.0

And normalization is done by LLVM:

• https://github.com/crystal-lang/crystal/blob/master/spec/compiler/codegen/target_spec.cr#L16
• https://github.com/crystal-lang/crystal/blob/master/src/compiler/crystal/codegen/target.cr

So: not planning on dropping -apple- from the platform triplet, (arch, vendor, operating system), independently of what Crystal shows on their tiers options as I'm not following Crystal's usage (which is inconsistently showing darwin in one side, then macOS in another).

[luislavena]

As I said on the Crystal forums post: you're welcome to grab this code and adapt to your needs, if you want it named differently, be my guess and modify it on your own for your own purpose and usage, you're not forced or obligated to share these changes back.