I checked —print cfg for the thumbv7m-none-eabi target and got

```

debug_assertions
panic="abort"
target_abi="eabi"
target_arch="arm"
target_endian="little"
target_env=""
target_has_atomic="16"
target_has_atomic="32"
target_has_atomic="8"
target_has_atomic="ptr"
target_os="none"
target_pointer_width="32"
target_vendor="unknown"
```