Help Needed - find compatible toolchain

[neo2043]

im trying to compile a repo kezii/esp32cam_rs. im just trying to make sure that the repo work. but compiling it gives errors, so asked what the issue was here. there they said that it was a compatibility issue with current rustc version, and i have to downgrade. so im trying to find a compatible rustc version.
esp-idf-svc version: 0.49

i tried this command MCU=esp32 cargo +1.80 espflash flash --before no-reset --target xtensa-esp32-espidf --example webserver --monitor and it gave me an error

  × Failed to build project
  ╰─▶ `cargo metadata` exited with an error: error: failed to run `rustc` to learn about target-specific
      information

      Caused by:
        process didn't exit successfully: `/home/auto/.rustup/toolchains/1.80-x86_64-unknown-linux-gnu/bin/
      rustc - --crate-name ___ --print=file-names --cfg espidf_time64 --target xtensa-esp32-espidf --crate-
      type bin --crate-type rlib --crate-type dylib --crate-type cdylib --crate-type staticlib --crate-type
      proc-macro --print=sysroot --print=split-debuginfo --print=crate-name --print=cfg` (exit status: 1)
        --- stderr
        error: Error loading target specification: Could not find specification for target "xtensa-esp32-
      espidf". Run `rustc --print target-list` for a list of built-in targets

i suppose this tried to compile the repo with non-esp toolchain versioned at 1.80.

i have the latest esp toolchain, 1.85 installed. how can i add and use a compatible toolchain or just use above command with + syntax directly.

[neo2043]

ok, i figured it out just execute espup install -v 1.80.0.0. this will install the downgraded toolchain. to make it default you have to add the content of export file created in home directory to .bashrc and if there is already a toolchain path there, either comment it out or delete it all together.