Except you can't, because it's a C file, not D. What am I...

Does your hardware support it? That message looks like the C preprocessor telling you it...

The problem list:


[importC Error: unsigned __int128 not supported](https://forum.dlang.org/post/gszrquconihrheekkxes...

get this error:


```sh
In file included from /llvm/lib/clang/18/include/stddef.h...

...can't just import C headers with importC, since it seems like that would be...

No, this is completely different to my suggestion.

https://forum.dlang.org/post/v0urjh$58i$1@digitalmars.com

...wrote:

You can't import headers with importC. You have to import C files.

It...

A modification of the header is not needed. It is enough to create a wrapper...

That requires modification of the C header.
maybe using the attribute on the import is...