[Proposal] Switch to the Universal CRT on Windows.

[Adam Wilson]

On Wednesday, 1 July 2026 at 12:37:22 UTC, Dennis wrote:
> In my own code I avoid libc as much as I can, using 
> `CreateFileW` instead of `fopen` for example. Only a few 
> essentials like memcpy and memset remain since LDC sometimes 
> emits calls to that even when you don't write them yourself. At 
> least those are simple and deterministic: I haven't found a 
> libc yet that implements them visibly different than the rest.

There is a technical argument for leaving `libc` behind as well. 
Specifically if you want to do anything with async operations 
you're going to have to use the API's specific to that platform. 
For example: Linux has `io_uring` where Windows has I/O 
Completion Ports.

`libc` stops working as a universal system interface when you 
need to do async work, which means that anywhere we might want to 
support an async interface, we'll need to use something other 
than `libc`.

Another example is terminal colors. Windows has 
`SetConsoleTextAttribute()` where `libc` is the only choice on 
Linux. Which means we really should be abstracting away `libc`.

IMO, BaseD is going to become that abstraction.