will Prefix Data be supported on the WebAssembly target?

I used this feature (http://llvm.org/docs/LangRef.html#prefix-data) in
the Zig frontend for something, but when the target architecture is
wasm32, it generates:

LLVM ERROR: function sections must contain one function each

There is already a bug report for it, but it does not seem to have much
attention given to it:

https://bugs.llvm.org/show_bug.cgi?id=42322

Is this something that is fundamentally not possible on the WebAssembly
target? Or is this something that simply needs an implementation? If so,
has anyone started working on it?

Regards,
Andrew