mrustc: update to 20221110

[catap]

Description

Here the initial support of arm64.

Type(s)

• enhancement

Tested on

macOS 12.6 21G115 arm64
Xcode 13.1 13A1030d

macOS 12.6 21G115 x86_64
Xcode 14.0.1 14A400

Verification

Have you

• followed our Commit Message Guidelines?
• squashed and minimized your commits?
• checked that there aren't other open pull requests for the same change?
• checked your Portfile with port lint --nitpick?
• tried a full install with sudo port -vst install?
• tested basic functionality of all binary files?

[barracuda156]

@catap Why is it blocked by upstream though? arm64 is only going to get bigger. Intel is a thing of the past.
And then, Power systems are there (though not on Macs anymore).

[catap]

@barracuda156 it requires unmerged patches to upstream :)

[pmetzger]

This has been sitting around for quite a while...

[catap]

@pmetzger I'm waiting for upstream to react to the thepowersgang/mrustc#292

This is a bit tricky and can broke something => I prefer to keep it as draft until it is reviewed and merged by upstream.

[catap]

@pmetzger upstream is merged all required patches.

I've worked very hard to bring mrustc to arm64 and here it is.

To best of my knowledge it is as good as it can be and ready to merge.

[barracuda156]

@catap So arch hardcoding is gone? We can try PPC?

[catap]

@barracuda156 I've replaced the hardcoded place to support arm64 :)

Anyway, PPC requires future patches, at least it should be defined here: https://github.com/thepowersgang/mrustc/blob/b4556a7bb4519831e03d3a95448e0881923a16e0/src/trans/target.cpp#L570-L595 and it requires to define ARCH_POWERPC at beginning of this file.

i386 seems that it might work out of the box. But I haven't tested it or tried it.

So, short summary:

• mrustc is quite possible to be ready to support ppc with some work, and i386 out of box;
• I assume that i386 version of rustc which is bootstraped by mrustc is also durable.

Anyway, I suggest to wait with ppc until mrustc can bootstrap a rust which can use gcc as backend, that makes things much easy to support ppc.

[catap]

@reneeotten I'm a maintainer of this port. May I ask you to merge this PR? Thanks.

[catap]

Thanks Ken!

[barracuda156]

@catap I get this:

Failed to parse file lang/mrustc/Portfile: can't read "rust_platforms()": no such element in array

[catap]

@barracuda156 seems that you've tried it on unsupported (yet) platforms => if so, feel free to add your platform to this list.

I really doubt that PPC works. But i386 might. You may ass i386 i686 to platforms array, that should allow you to test it.

[barracuda156]

I really doubt that PPC works. But i386 might. You may ass i386 i686 to platforms array, that should allow you to test it.

Well, parsing the portfile should work on all platforms, I guess? I am aware that building for PPC is not [yet] supported.

[catap]

@barracuda156 indeed.

#16653

[barracuda156]

@catap Just for the record, it still fails trying to build an x86 component:

(0/13) BUILDING core v0.0.0
> /opt/local/var/macports/build/_opt_PPCSnowLeopardPorts_lang_mrustc/mrustc/work/mrustc-1b1416bb2b44e2c331c7201833305cac29d571e8/bin/mrustc rustc-1.54.0-src/library/core/src/lib.rs -o output-1.54.0/libcore.rlib --crate-name core --crate-type rlib -C emit-depfile=output-1.54.0/libcore.rlib.d --crate-tag 0_0_0 --cfg debug_assertions -O -L output-1.54.0 --edition 2018
rustc-1.54.0-src/library/core/src/../../stdarch/crates/core_arch/src/x86/avx2.rs:520: error:0:Type mismatch between [u32; 8] and [u32; 576460752303423488] - sizes differ
rustc-1.54.0-src/library/core/src/../../stdarch/crates/core_arch/src/x86/avx2.rs:520: note: From here
Process was terminated with signal 6

[catap]

@barracuda156 seems that cross compilation doesn't detects the CPU features right :(