Function invoke_rustc

crates/cuda_builder/src/lib.rs:373–508

(builder: &CudaBuilder)

}

fn invoke_rustc(builder: &CudaBuilder) -> Result<PathBuf, CudaBuilderError> {
    // see https://github.com/EmbarkStudios/rust-gpu/blob/main/crates/spirv-builder/src/lib.rs#L385-L392
    // on what this does
    let rustc_codegen_nvvm = find_rustc_codegen_nvvm();

    let new_path = get_new_path_var();

    let mut rustflags = vec![format!(
        "-Zcodegen-backend={}",
        rustc_codegen_nvvm.display(),
    )];

    if let Some(emit) = &builder.emit {
        let string = match emit {
            EmitOption::LlvmIr => "llvm-ir",
            EmitOption::Bitcode => "llvm-bc",
        };
        rustflags.push(format!("--emit={}", string));
    }

    let mut llvm_args = vec![NvvmOption::Arch(builder.arch).to_string()];

    if !builder.nvvm_opts {
        llvm_args.push("-opt=0".to_string());
    }

    if builder.ftz {
        llvm_args.push("-ftz=1".to_string());
    }

    if builder.fast_sqrt {
        llvm_args.push("-prec-sqrt=0".to_string());
    }

    if builder.fast_div {
        llvm_args.push("-prec-div=0".to_string());
    }

    if !builder.fma_contraction {
        llvm_args.push("-fma=0".to_string());
    }

    if builder.override_libm {
        llvm_args.push("--override-libm".to_string());
    }

    if builder.debug != DebugInfo::None {
        let (nvvm_flag, rustc_flag) = builder.debug.into_nvvm_and_rustc_options();
        llvm_args.push(nvvm_flag);
        rustflags.push(rustc_flag);
    }

    let llvm_args = llvm_args.join(" ");
    if !llvm_args.is_empty() {
        rustflags.push(["-Cllvm-args=", &llvm_args].concat());
    }

    let target = if builder.nvptx_32 {