Thomas Munro:
Out of curiosity, is nixos deliberately using an old macOS deployment
target or SDK, 10.something? I'm just wondering if our feature
detection is working correctly on macOS/x86, because I'd expect real
preadv/pwritev to be there from 11 onwards, and 11 is already out of
support by Apple.
There has been a lot of work on the macOS SDK in nixpkgs lately, but it
seems that the default for x86-64 is still v10 [1], yes:
> x86_64-darwin uses the 10.12 SDK by default, but some software is not
> compatible with that version of the SDK. In that case, the 11.0 SDK
> used by aarch64-darwin is available for use on x86_64-darwin. [...]
It seems like the goal is to bump x86-64 to v11 in the next release
cycle [2].
Best,
Wolfgang
[1]: https://nixos.org/manual/nixpkgs/unstable/#sec-darwin
[2]:
https://discourse.nixos.org/t/on-the-future-of-darwin-sdks-or-how-you-can-stop-worrying-and-put-the-sdk-in-build-inputs/50574/11
