Q: Is the platform target really correct?

[cuviper]

In mod platform, this is using #[cfg(target_os = "...)] to select the appropriate probe implementation.

However, AIUI compiler plugins are compiled for the host platform, since they have to be loaded in rustc, so this code will see target_os of the host. But this may be different than the target platform that you're generating code for, set by cargo build --target ....

So I suspect this is incorrect for cross-compilation. It probably should use some runtime condition to detect the target and select the probe implementation.

[Fiedzia]

You might be right, I have no idea how cross-compilation works. So the plugin should detect compilation target and insert appropriate call.