x86_64-pc-windows-msvc Link error with very large number of objects

[estk]

Checklist

• I've looked through the issues and pull requests for similar reports

Describe your issue

Linking fails with a very large number of objects on x86_64-pc-windows-msvc.

What target(s) are you cross-compiling for?

other (specify in description)

Which operating system is the host (e.g computer cross is on) running?

• macOS
• Windows
• Linux / BSD
• other OS (specify in description)

What architecture is the host?

• x86_64 / AMD64
• arm32
• arm64 (including Mac M1)

What container engine is cross using?

• docker
• podman
• other container engine (specify in description)

cross version

0.2.5

Example

cross build --release -p mypackage
...
 = note: 0048:err:winediag:nodrv_CreateWindow Application tried to create a window, but no driver could be loaded.
          0048:err:winediag:nodrv_CreateWindow L"The explorer process failed to start."
          0048:err:systray:initialize_systray Could not create tray window
          0024:err:environ:build_command_line command line too long (38785)

Additional information / notes

I found this issue in rustc: rust-lang/rust#41190, and it makes me wonder if the workaround implemented there is somehow not getting triggered in the cross docker container.

Note: that the msvc docker container was built unmodified from the cross-toolchain image

[Emilgardis]

are you sure you're actually using cross? We only support msvc via https://github.com/cross-rs/cross-toolchains, which you need to build yourself. Cross will output a warning if it fallbacks to not using a container

I should've read the last note in your report :)

[Emilgardis]

Can you show the entire build log with -v added to the cross invocation

[estk]

@Emilgardis unfortunately I cant post the log publicly. Can you tell me what you're looking for?

I can confirm that the link command is extremely long 38k chars sounds right.

If you look at the rust issue, their fix seemed trivial, however i am not familiar enough with how rust links to know if we can get in the middle of object generation and linking...

[Emilgardis]

I just wanted more context, but it's fine :) A way to reproduce this would be good though.

Do you see any "linker failed with exit code" message?

https://github.com/rust-lang/rust/blob/5d3d3479d774754856db2db3e439dfb88ef3c52f/compiler/rustc_codegen_ssa/src/back/link.rs#L1544-L1557

I suspect this is the root problem, the fallback is never invoked, and I think that's because WINE doesn't give us error code E2BIG (7)

I think a fix would have to be done in rustc here or we wrap wine and translate the error code