On Sun, Jul 23, 2023 at 11:21 PM Miguel Ojeda ojeda@kernel.org wrote:
`rustc` outputs by default the temporary files (i.e. the ones saved by `-Csave-temps`, such as `*.rcgu*` files) in the current working directory when `-o` and `--out-dir` are not given (even if `--emit=x=path` is given, i.e. it does not use those for temporaries).
Since out-of-tree modules are compiled from the `linux` tree, `rustc` then tries to create them there, which may not be accessible.
Thus pass `--out-dir` explicitly, even if it is just for the temporary files.
Similarly, do so for Rust host programs too.
Reported-by: Raphael Nestler raphael.nestler@gmail.com Closes: https://github.com/Rust-for-Linux/linux/issues/1015 Reported-by: Andrea Righi andrea.righi@canonical.com Tested-by: Raphael Nestler raphael.nestler@gmail.com # non-hostprogs Tested-by: Andrea Righi andrea.righi@canonical.com # non-hostprogs Fixes: 295d8398c67e ("kbuild: specify output names separately for each emission type from rustc") Cc: stable@vger.kernel.org Signed-off-by: Miguel Ojeda ojeda@kernel.org
v2:
- Add fix for host programs too (Masahiro).
This is now available in the mainline.
df01b7cfcef08bf3fdcac2909d0e1910781d6bfd