thumbv5te build fails with "LLVM ERROR: Unexpected anonymous function when writing summary"

[archshift]

target spec thumbv5te-none-eabi.json:

{
    "arch": "arm",
    "cpu": "arm946e-s",
    "llvm-target": "thumbv5te-none-eabi",
    "os": "none",
    
    "data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64",
    "relocation-model": "static",
    "target-endian": "little",
    "target-pointer-width": "32",
    "target-c-int-width": "32",
    "features": "+soft-float,+strict-align",
    
    "no-compiler-rt": true,
    "disable-redzone": true,
    "executables": true,
    "morestack": false,
    
    "linker-flavor": "gcc",
    "linker-is-gnu": true,
    "pre-link-args": {
        "gcc": [
            "-nostdlib",
            "-Tlayout.ld"
        ]
    },
    "post-link-args": {
        "gcc": [ "-lgcc" ]
    }
}

Using arm-none-eabi-gcc as my linker.

[Razaekel]

I'm getting this same issue with the "thumbv7em-none-eabihf" target.

[japaric]

This has been reported upstream as rust-lang/rust#51947. AFAICT, it only happens when compiling with optimizations and debuginfo enabled. So try removing [profile.release] debug = true from Cargo.toml before invoking Xargo.

@Razaekel you don't need to compile compiler-builtins for that target, or Xargo for that matter. rustup target add thumbv7em-none-eabihf will give you a precompiled libcompiler_builtins; then you only need to do cargo build --target thumbv7em-none-eabihf.

[nikic]

The referenced rust issue has been fixed a while ago. This issue can probably be closed as well.