Add AArch64 to src/core/thread/types.d

[WalterBright]

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[dlang-bot]

Thanks for your pull request, @WalterBright!

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Testing this PR locally

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dub run digger -- build "master + dmd#22722"

[WalterBright]

@kinke another one that mysteriously doesn't have support for AArch64?

[kinke]

LDC has a version (LDC) branch for this, similar to the GCC one here.

[WalterBright]

@kinke : druntime/src/core/thread/types.d is in druntime/mak/SRCS. How does it not get compiled by ldc and not trigger the assert?

[kinke]

Well, LDC doesn't use the Makefiles, but uses CMake. And compiles the file obviously. With the mentioned LDC-specific version(LDC)-branch: https://github.com/ldc-developers/ldc/blob/57996fb5b7afbf2cb3d25fe2470b26caf86769fc/runtime/druntime/src/core/thread/types.d#L42-L49

[WalterBright]

Oddly, that LDC section does not exist in master.

[WalterBright]

I fixed it for DigitalMars and added the missing LDC section in.

[kinke]

(Quite a few mods/hacks in LDC's druntime and Phobos haven't been upstreamed.)

[WalterBright]

Wouldn't that make life difficult for you as then you have to constantly check for changes in master and fold them into the LDC versions?

[kinke]

Oh, merge conflicts in druntime/Phobos occur very seldomly, and are usually extremely trivial to resolve. The absolute least of my worries whenever syncing LDC with latest DMD/Phobos stable. - Some mods should be upstreamed, others I'm not so sure about (as it affects readability of upstream druntime).