| 28 Dec 2025 |
 emily | so there's all sorts of potential differences wrt feature resolution etc. | 00:13:28 |
 flokli | yeah, agreed | 00:13:35 |
| emily | by default I'd assume it's a bug in our janky reimplementation of half of Cargo :) | 00:13:56 |
| flokli | huuurgh: https://github.com/aws/aws-lc-rs/blob/e0aa4187a8e00e2ec69dc4efb8a10a824863f586/aws-lc-sys/builder/main.rs#L492-L507 | 00:15:07 |
| flokli | https://github.com/NixOS/nixpkgs/pull/474675 | 00:23:12 |
 Randy Eckenrode | Next in my Swift work is a detour to make XCTest and Swift Testing work on Darwin, then I want to work on the stdlib. I’m probably done for tonight though. | 00:50:09 |
|  anton joined the room. | 08:53:51 |
 Ihar Hrachyshka | where does one define common CFLAGS / CPPFLAGS for darwin? | 23:17:43 |
| Ihar Hrachyshka | * where does one define common CFLAGS / CPPFLAGS for darwin? (for all nixpkgs) | 23:18:00 |
| Randy Eckenrode | Usually in the wrapper. What flags? | 23:21:52 |
| Ihar Hrachyshka | the ones for SET_FDSIZE increase | 23:52:09 |
| Ihar Hrachyshka | is it the wrapper postFixup? | 23:54:47 |
| 29 Dec 2025 |
| Ihar Hrachyshka | is it something like this? https://github.com/NixOS/nixpkgs/pull/474914 | 00:01:45 |
| Randy Eckenrode | That looks reasonable. | 00:28:13 |
| emily | can you explain "except the need to pass POSIX certification"? | 00:38:13 |
| Randy Eckenrode | POSIX requires that select return EINVAL when nfds is larger than SET_FDSIZE. | 00:39:37 |
| Ihar Hrachyshka | there's some more info in https://gitlab.gnome.org/GNOME/glib/-/merge_requests/4953
but basically "POSIX requires EINVAL if nfds >= FD_SETSIZE" | 00:39:45 |
| Randy Eckenrode | Which is 1024 AFAIK for historical reasons. | 00:40:02 |
| Randy Eckenrode | Darwin has a way to allow bigger sizes, but you have to opt into it. | 00:40:53 |
| emily | I'm not a fan of setting global compiler flags that diverge from the platform defaults and that can result in programs having hidden security vulnerabilities when compiled with standard flags. _DARWIN_UNLIMITED_SELECT especially is a kind of crazy hack | 00:41:10 |
| emily | programs that need/can handle such a definition should set the flags themselves in their own build systems | 00:41:28 |
