I'm trying to compile a C library of mine for WebAssembly, using clang (no emscripten), and it compiles fine with `clang` version `8.0.1`, but fails with `clang` version `9.0.0`. The reported error is `wasm-ld: error: ….o: undefined symbol: __heap_base`. Has `__heap_base` been replaced with some other symbol?

The library is open source and compilation instructions can be found [here](https://github.com/GeorgeLyon/Opaque#webassembly)