GCC 12.1

[ilg-ul]

I just gave GCC 12.1 a try. It passed on Intel, but failed on M1:

checking if mkdir takes one argument... no
*** Configuration aarch64-apple-darwin20.6.0 not supported
make[1]: *** [Makefile:4555: configure-gcc] Error 1
make[1]: Leaving directory '/Users/ilg/Work/gcc-12.1.0-1/darwin-arm64/build/gcc-12.1.0'
make: *** [Makefile:1031: all] Error 2
ilg@cloud ~ % 

Any thoughts?

[iains]

you would need to use the 12.1-darwin-release-0 branch: https://github.com/iains/gcc-12-branch/releases/tag/gcc-12.1-darwin-r0 aarch64 darwin supports is not yet upstreamed, so only available here.

[ilg-ul]

aarch64 darwin supports is not yet upstreamed

For the record, I just finished building the cross RISC-V toolchain based on 12.1, so host support for AArch64 Darwin is already there (actually not a big deal); only the target part is not yet upstreamed.

[iains]

aarch64 darwin supports is not yet upstreamed

For the record, I just finished building the cross RISC-V toolchain based on 12.1, so host support for AArch64 Darwin is already there (actually not a big deal); only the target part is not yet upstreamed.

That's correct - although the target part is ≈ 100x the size of the host support.

NOTE : Host support is only available on the 'darwin' branch for 11.x (since adding that is not a 'regression fix').

[ilg-ul]

NOTE : Host support is only available on the 'darwin' branch for 11.x (since adding that is not a 'regression fix').

And I guess the same will be true for the target part in 12.x, so 13.x might be the next chance to include it.

[iains]

NOTE : Host support is only available on the 'darwin' branch for 11.x (since adding that is not a 'regression fix').

And I guess the same will be true for the target part in 12.x, so 13.x might be the next chance to include it.

Upstream, yes that's right (hopefully, there will be enough time this cycle, all depends on $dayjob);

The 12.x darwin branch version will be maintained to keep track of any fixes made to the master/upstream version.

[ilg-ul]

@fxcoudert, do you have any updates for this?

I saw there was some work on building GCC 12 on Homebrew, including merging the fix in CMake issue 23500, and there is a separate gcc@12.rb, but the public gcc.rb still points to 11.3.

Do you expect more work on 12.1 for Homebrew, or I can already use your patch?

[fxcoudert]

For Homebrew: a technical issue on Linux is preventing us from migrating to gcc 12 as the “main” gcc formula at the moment 😢 But we have a gcc@12 version available, which can be used by users who request it.

I will update the GCC versions 11 and 12 in Homebrew with Iain's new release when it's out.

[ilg-ul]

I compiled 12.1 in my build environment, with the patch used in gcc@12.rb, and it passed. :-)

But if it is not final, I can postpone my release.

[iains]

I will update the GCC versions 11 and 12 in Homebrew with Iain's new release when it's out.

I am only now waiting for confirmation (or otherwise) that the pre-releases fix the reported bad relocations and resulting link error. For 11.3-pre-r2 I think we can be quite confident after Matthew's testing - but as for 12.1-pre-r1, it would be good to confirm that it fixes the second reported issue (if possible).

[iains]

https://github.com/iains/gcc-12-branch/releases/tag/gcc-12.1-darwin-r1

Please put GCC 12 issues here: https://github.com/iains/gcc-12-branch/issues

[ilg-ul]

@fxcoudert, any changes in gcc-12.1-darwin-r1 worth an update of gcc@12.rb?

[fxcoudert]

@ilg-ul it is being done in https://github.com/Homebrew/homebrew-core/pull/103713

[ilg-ul]

Great, thank you!

[ilg-ul]

The xPack GCC 12.1.0-1 binaries are also available:

• https://github.com/xpack-dev-tools/gcc-xpack/releases/tag/v12.1.0-1