How to tell what version of the WASI-SDK is installed?

[brettcannon]

E.g., is there a text file somewhere I can have users look at to tell me what they tried using? (Context: python/cpython#113516).

[abrown]

Reading through the issue, I see what you mean. Usually it's apparent if the user shows the full path to Clang, e.g., /opt/wasi-sdk-20.0/bin/clang. But it seems reasonable to add a version file somewhere for this kind of situation.

[sbc100]

Some kind of version.h header might be good idea