Since commit 96d9b94a98 (Emscripten: Add platform modules, 2025-05-16,
v4.2.0-rc1~607^2~3) we've considered the `.wasm` to be the `try_compile`
output because we need `COPY_FILE` to get it for extracting `INFO:`
strings during our inspection checks. This breaks `try_run` because
`node`, used via `CMAKE_CROSSCOMPILING_EMULATOR`, expects the `.js`.
Revert to considering the `.js` to be the primary output file, but
switch to the `.wasm` in `COPY_FILE`'s implementation.
Fixes: #27421
Compiler inspection relies on `try_compile`'s `COPY_FILE` option to copy
the `.wasm` file because the `.js` does not have the `INFO:size` string.
Issue: #27421
LLD automatically resolves newly encountered symbols using object files
previously encountered. Also, the Emscripten compiler driver invokes
the LLD linker with `--whole-archive ... --no-whole-archive` around all
the libraries. Therefore we should not repeat any.
Issue: #27232
Suggested-by: Marc Chevrier <marc.chevrier@gmail.com>
Brad King
Quinn Powell