[Bug 1993183] Re: NEW SRU rustc linux kernel requirements

[TuxInvader]

Hi all,

I would like to confirm that I can build the mainline kernel on jammy
with the rust/bindgen packages in the proposed repository. However the
kernel seems to have rust disabled due to incompatible configuration
options (CONFIG_MODVERSIONS, CONFIG_DEBUG_INFO_BTF, and
CONFIG_HAVE_GCC_PLUGINS).

If I patch debian.master/config/annotations (see attached) to disable
those options, and enable RUST and the RUST sample code, then the build
fails with:

***
*** Rust compiler 'rustc-1.62' is too new. This may or may not work.
***   Your version:     1.62.1
***   Expected version: 1.62.0
***
  BINDGEN rust/bindings/bindings_generated.rs
  BINDGEN rust/bindings/bindings_helpers_generated.rs
  UPD     rust/target.json
  RUSTC L rust/core.o
error: '-ftrivial-auto-var-init=zero' hasn't been enabled; enable it at your own peril for benchmarking purpose only with '-enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang', err: true
thread 'main' panicked at 'Unable to generate bindings: ()', src/main.rs:54:36
stack backtrace:
   0:     0x55dafce519ec - <unknown>
   1:     0x55dafce6ceae - <unknown>
   2:     0x55dafce315f1 - <unknown>
   3:     0x55dafce35ff5 - <unknown>
   4:     0x55dafce35c7a - <unknown>
   5:     0x55dafce364fc - <unknown>
   6:     0x55dafce525a7 - <unknown>
   7:     0x55dafce51c84 - <unknown>
   8:     0x55dafce361c2 - <unknown>
   9:     0x55dafcc5abd3 - <unknown>
  10:     0x55dafcc5acb3 - <unknown>
  11:     0x55dafcc799ec - <unknown>
  12:     0x55dafcc65854 - <unknown>
  13:     0x55dafcc7ad03 - <unknown>
  14:     0x55dafcc65d49 - <unknown>
  15:     0x55dafce30f81 - <unknown>
  16:     0x55dafcc65b08 - <unknown>
  17:     0x7ff26d448d90 - <unknown>
  18:     0x7ff26d448e40 - __libc_start_main
  19:     0x55dafcc5ae25 - <unknown>
  20:                0x0 - <unknown>
make[3]: *** [/home/source/rust/Makefile:310: rust/bindings/bindings_helpers_generated.rs] Error 1
make[3]: *** Deleting file 'rust/bindings/bindings_helpers_generated.rs'
make[3]: *** Waiting for unfinished jobs....


** Patch added: "modifications to annotations file"
   https://bugs.launchpad.net/ubuntu/+source/rustc-1.62/+bug/1993183/+attachment/5663937/+files/rust-samples.patch

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Title:
  NEW SRU rustc linux kernel requirements

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