Support for Aarch64 and more architectures? about mold

[rui314]

ARM64 support has been implemented.

[rui314]

In the upcoming mold 0.9 release, I will have fixed almost all compatibility issues. AArch64 support will be added after that. I don't have an ARM machine in hand, so I need to set up a ARM machine in a cloud to start working on it.

In terms of timeline, I'll probably finish it by the end of this year, but I can't make a promise. If you are really interested in using mold for your business and need an AArch64 support ASAP, I can make a contract with you to give it a higher priority.

[Logarithmus]

@rui314 does mold support cross-linking? E.g. running mold on aarch64, but linking x86_64 object files, or vice versa.
If no, is cross linking supported planned in future?

[rui314]

mold's behavior only depends on its command-line arguments, so it should naturally behave as a cross-compiler if you give the exact command line options and input files as a target platform. That being said, currently only x86 and x86-64 targets are supported, so it can act as a cross-compiler from AArch64 to x86-64 for example, but can't do the opposite (can't create an AArch64 executable yet).

[Logarithmus]

@rui314 and what options should I pass to mold to specify target architecture? Or does it somehow auto detect the target from the object files themselves?

[rui314]

It's -m, but even a native compiler driver always pass that option to a linker.

[syrusakbary]

In terms of timeline, I'll probably finish it by the end of this year, but I can't make a promise. If you are really interested in using mold for your business and need an AArch64 support ASAP, I can make a contract with you to give it a higher priority.

Thanks for the proposal!
Right now we are in the evaluation phase, but if the time comes where this becomes more critical for us I'll ping you again!