LLVM version used by Rust does not match with ld.lld version

[equaeghe]

Upon update of Thunderbird and Firefox, after an update of LLVM, I get the following error when emerging Thundebird/Firefox:

Code: Select all

 * Using LLVM slot 14 to build
 * Rust is using LLVM version 13 but ld.lld version belongs to LLVM version 14.
 * You will be unable to link mail-client/thunderbird. To proceed you have the following options:
 *   - Manually switch rust version using 'eselect rust' to match used LLVM version
 *   - Switch to dev-lang/rust[system-llvm] which will guarantee matching version
 *   - Build mail-client/thunderbird without USE=lto
 *   - Rebuild lld with llvm that was used to build rust (may need to rebuild the whole 
 *     llvm/clang/lld/rust chain depending on your @world updates)
 * ERROR: mail-client/thunderbird-91.10.0::gentoo failed (setup phase):
 *   LLVM version used by Rust (13) does not match with ld.lld version (14)!

• There is only one version of rust installed, so the 'eselect rust' option does not apply.
• the ‘system-llvm’ use flag has been removed from rust, AFAICT, so dev-lang/rust[system-llvm] isn't a valid option anymore
• I want to use ‘lto’, so dropping that that is not a preferred option
• I rebuilt lld and rust already, without any luck; it is unclear to me how to properly follow the instructions of this last option (there seem to be dependencies portage should take care of here)

I would be grateful if someone can point me towards the right actions to finally manage updating Thundebird/Firefox.

[NeddySeagoon]

equaeghe,

As of a few minuites ago ...

Code: Select all

[I] dev-lang/rust
     Available versions:  (stable) 1.59.0(stable/1.59)^t{tbz2} (~)1.60.0(stable/1.60)^t (~)1.61.0-r1(stable/1.61)^t{tbz2}
       {clippy debug dist doc miri nightly parallel-compiler profiler rls rust-src rustfmt system-bootstrap system-llvm ...

[Josef.95]

NeddySeagoon,

yes, but the system-llvm use flag is currently masked in package.use.stable.mask

@equaeghe

Not sure, but I think best is report a bug

[NeddySeagoon]

Josef.95,

Thank you.
llvm-14 is still testing.

[equaeghe]

Not sure, but I think best is report a bug

Bug 838121 already existed, apparently.

[Josef.95]

equaeghe,
as workaround: Using

Code: Select all

~dev-lang/rust-1.61.0
=virtual/rust-1.61.0

in package.accept_keywords should probably work.

(but yes, it is not ideal for stable systems users :-/)

[equaeghe]

as workaround: Using

Code: Select all

~dev-lang/rust-1.61.0
=virtual/rust-1.61.0

in package.accept_keywords should probably work.

Thanks for the suggestion. In the end I masked llvm:14 and that did the trick.

[sam_]

Filed bug 850202, as newer Rust is needed to support newer LLVM.