These all pass now! I have also removed the warning about the LLVM
backend not supporting incremental compilation; I expect it will work
sort of okay in practice by now.
On Windows, it is sometimes problematic to depend on ws2_32.dll. Before,
users of std.Io.Threaded would have to call ioBasic() rather than io()
in order to avoid unnecessary dependencies on ws2_32.dll. Now, the
application can disable networking with std.Options.
This change is necessary due to moving networking functionality to
be based on Io.Operation, which is a tagged union.
These cases have been disabled for a while, and we have transitioned to
using a compact file format for incremental test cases.
I was originally planning to port all of these cases, but the vast
majority aren't testing anything interesting, so it wasn't worth the
effort. I did look through each one; anything interesting being tested
has been extracted into a new case in `test/incremental/`.
Two of the new tests are currently failing with the self-hosted ELF
linker, and thus are currently only enabled with the C backend.
Resolves: #12844
Matthew Lugg