Binaries not at correct location?

[cptpiepmatz]

Hey 👋, I just wanted to compile the project after a fresh clone. The quickstart guide suggested running cargo run --bin rustflags but that doesn't work for me, as Cargo is not able to find the binaries. I checked the docs on this and I think the binaries are in an incorrect location. According to the docs it should be in src/bin or defined in the Cargo.toml. Am I doing something wrong here?

[FractalFir]

Recently, there were some changes to the way librustcdriver.so is linked against the codegen, which prevented me from using anything in src/bin.

I have ported most of my utilities to use cargo scripts, but rustflags was not ported yet - it is now. The docs should also reflect this change now.

[cptpiepmatz]

Thanks, that makes it clear, but the script doesn't seem to work for me:

❯ ./bin/rustflags.rs
warning: `package.edition` is unspecified, defaulting to `2021`
   Compiling rustflags v0.0.0 (/home/piet/projects/rustc_codegen_clr/bin)
error[E0583]: file not found for module `build_backend`
 --> rustflags.rs:2:1
  |
2 | mod build_backend;
  | ^^^^^^^^^^^^^^^^^^
  |
  = help: to create the module `build_backend`, create file "build_backend.rs" or "build_backend/mod.rs"
  = note: if there is a `mod build_backend` elsewhere in the crate already, import it with `use crate::...` instead

error[E0432]: unresolved import `crate::build_backend::ilasm_check`
 --> rustflags.rs:3:5
  |
3 | use crate::build_backend::ilasm_check;
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `ilasm_check` in `build_backend`

error[E0425]: cannot find function `cargo_build_env` in module `crate::build_backend`
 --> rustflags.rs:5:43
  |
5 |     let build_env = crate::build_backend::cargo_build_env();
  |                                           ^^^^^^^^^^^^^^^ not found in `crate::build_backend`

Some errors have detailed explanations: E0425, E0432, E0583.
For more information about an error, try `rustc --explain E0425`.
error: could not compile `rustflags` (bin "rustflags") due to 3 previous errors

[FractalFir]

Thanks, that makes it clear, but the script doesn't seem to work for me:

❯ ./bin/rustflags.rs
warning: `package.edition` is unspecified, defaulting to `2021`
   Compiling rustflags v0.0.0 (/home/piet/projects/rustc_codegen_clr/bin)
error[E0583]: file not found for module `build_backend`
 --> rustflags.rs:2:1
  |
2 | mod build_backend;
  | ^^^^^^^^^^^^^^^^^^
  |
  = help: to create the module `build_backend`, create file "build_backend.rs" or "build_backend/mod.rs"
  = note: if there is a `mod build_backend` elsewhere in the crate already, import it with `use crate::...` instead

error[E0432]: unresolved import `crate::build_backend::ilasm_check`
 --> rustflags.rs:3:5
  |
3 | use crate::build_backend::ilasm_check;
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `ilasm_check` in `build_backend`

error[E0425]: cannot find function `cargo_build_env` in module `crate::build_backend`
 --> rustflags.rs:5:43
  |
5 |     let build_env = crate::build_backend::cargo_build_env();
  |                                           ^^^^^^^^^^^^^^^ not found in `crate::build_backend`

Some errors have detailed explanations: E0425, E0432, E0583.
For more information about an error, try `rustc --explain E0425`.
error: could not compile `rustflags` (bin "rustflags") due to 3 previous errors

I forgot to include one of the files(build_backend.rs). Should be fixed now.

[cptpiepmatz]

Running the script inside bin works now fine for me, but it seems your script depends where you run it, so running it in root doesn't work:

❯ ./bin/rustflags.rs
warning: `package.edition` is unspecified, defaulting to `2021`
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.03s
     Running `/home/piet/.cargo/target/3e/587f9e7664f3c4/debug/rustflags`
thread 'main' panicked at build_backend.rs:194:10:
could not build the backend: Os { code: 2, kind: NotFound, message: "No such file or directory" }
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace