How can I use class and wasm?

[Jack]

On Friday, 16 October 2020 at 02:43:19 UTC, Paul Backus wrote:
> On Thursday, 15 October 2020 at 22:02:11 UTC, Jack wrote:
>> can I make it work? the code (see below) result in link error:
>>
>>>lld: error: wasm.o: undefined symbol: _D4wasm1C7__ClassZ
>>>lld: error: wasm.o: undefined symbol: _d_allocclass
>>>Error: linking with LLD failed
>>
>> command line:
>>
>>>ldc2 --d-debug -mtriple=wasm32-unknown-unknown-wasm -betterC 
>>>wasm.d
>>
>> ldc version:
>>> 1.24.0-beta1 (DMD v2.094.0, LLVM 11.0.0)
>>
>> code:
>>
>>>extern(C): // disable D mangling
>>>// seems to be the required entry point
>>>void _start() {}
>>>
>>>extern(C)
>>>int g()
>>>{
>>>    auto c = new C();
>
> You can't use `new` in betterC.

that's right, my bad but even a custom allocator, using 
malloc()/free() wouldn't work either. How can I allocate memory 
for this class?