Data layout compile error.

[commitcompanion]

Hello!
There was an error compiling kerla. Here is the debug meassage
By build with make run:
Compiling rustc-std-workspace-core v1.99.0 (/home/dev/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/rustc-std-workspace-core) error: data-layout for targetx64-14301396534749325905, e-m:e-i64:64-f80:128-n8:16:32:64-S128, differs from LLVM target's x86_64-unknown-none-elfdefault layout,e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128`

error: could not compile rustc-std-workspace-core (lib) due to 1 previous error
warning: build failed, waiting for other jobs to finish...
error: could not compile core (lib) due to 1 previous error
error: could not compile compiler_builtins (lib) due to 1 previous error
make[1]: *** [Makefile:96: build-crate] Fehler 101
make[1]: Verzeichnis „/home/dev/workbench/kerla“ wird verlassen
make: *** [Makefile:80: build] Fehler 2
`
This error exists on many rust kernels.
https://duckduckgo.com/?q=error%3A+data-layout+for+target+%60x64-14301396534749325905%60%2C+%60e-m%3Ae-i64%3A64-f80%3A128-n8%3A16%3A32%3A64-S128%60%2C+differs+from+LLVM+target%27s+%60x86_64-unknown-none-elf%60+default+layout%2C+%60e-m%3Ae-p270%3A32%3A32-p271%3A32%3A32-p272%3A64%3A64-i64%3A64-i128%3A128-f80%3A128-n8%3A16%3A32%3A64-S128%60+&t=newext&atb=v448-6__&ia=web
There not seem to be an easy fix for that.
Thanks!

[nuta]

Can you describe your build environment, such as OS version? I remember the error but don't remember how I fixed it.

[commitcompanion]

Hello,
I am using arch Linux. https://wiki.archlinux.org/title/LLVM
there are many kernels with that issue.
It is possible to switch from the custom data layout to the standard:
data-layout": "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128",
but then it crashes at this point:

error[E0635]: unknown feature stdsimd`
--> /home/dev/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ahash-0.7.6/src/lib.rs:33:42
|
33 | #![cfg_attr(feature = "stdsimd", feature(stdsimd))]
| ^^^^^^^

Compiling scroll v0.11.0
Compiling managed v0.7.2
Compiling byte order v1.4.3
For more information about this error, try rustc --explain E0635.
Compiling boot2dump v0.0.1
error: could not compile ahash (lib) due to 1 previous error
warning: build failed, waiting for other jobs to finish...
`

Maybe this crash is related to the different data layout?
Thanks!

[commitcompanion]

Ps: the same error when build the kernel of RezOS:

Compiling lock_api v0.4.7
Compiling rustc-std-workspace-core v1.99.0 (/home/dev/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/rustc-std-workspace-core)
error: data-layout for target x86_64-2915544087551329567, e-m:e-i64:64-f80:128-n8:16:32:64-S128, differs from LLVM target's x86_64-unknown-none default layout, e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128

error: could not compile rustc-std-workspace-core (lib) due to 1 previous error
warning: build failed, waiting for other jobs to finish...
error: could not compile core (lib) due to 1 previous error
error: could not compile compiler_builtins (lib) due to 1 previous error
make: *** [Makefile:102: build/kernel.x86_64.bin] Fehler 101
   ~/workbench/RezOS    master 

[nuta]

It sounds like you're using an expected Rust toolchain. Did you install cargo with rustup? If so, can you share more about your build environment, such as rustc version?

[commitcompanion]

Hello
Rust installed over the official way:
curl $installscript|sh
rustc 1.81.0 (eeb90cda1 2024-09-04)
cargo 1.81.0 (2dbb1af80 2024-08-20)
Thanks!

Edit:
rust-lang/rust#120492

[nuta]

@commitcompanion Hmm version look good 👍 Can you try it in a clean environment like in a docker container?