Re: Fix port/pg_iovec.h building extensions on x86_64-darwin

Thomas Munro <thomas.munro@gmail.com>

From: Thomas Munro <thomas.munro@gmail.com>

To: Wolfgang Walther <walther@technowledgy.de>

Cc: pgsql-hackers@lists.postgresql.org

Date: 2024-11-08T22:26:44Z

Lists: pgsql-hackers

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Fix sign-compare warnings in pg_iovec.h.
- 0fa688406595 18.0 landed
- 0a883a067bd7 17.1 landed

On Sat, Nov 9, 2024 at 8:08 AM Wolfgang Walther <walther@technowledgy.de> wrote:
> When building pg_cron [1] or pg_hll [2] for PG 17 on x86_64-darwin, we
> encounter the following build failure in nixpkgs:

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.