fanquake b2a137929a
depends: build libevent with -D_GNU_SOURCE
Currently, builds of libevent in depends, using CMake, fail on some
systems, like Alpine, with the following:
```bash
/bitcoin/depends/work/build/aarch64-unknown-linux-musl/libevent/2.1.12-stable-1516ed47ea8/evmap.c: In function 'evmap_signal_add_':
/bitcoin/depends/work/build/aarch64-unknown-linux-musl/libevent/2.1.12-stable-1516ed47ea8/evmap.c:456:31: error: 'NSIG' undeclared (first use in this function)
  456 |         if (sig < 0 || sig >= NSIG)
```

From what I can tell the `_GNU_SOURCE` "detection" in libevents CMake build
system, never? really worked, and it's not clear what a nice fix is.

For now, always use `_GNU_SOURCE` when building libevent in depends.

Github-Pull: #30743
Rebased-From: 556775408797d8e27154c3edaf139820b0979cce
2024-09-05 10:37:40 +01:00
..
2024-06-03 09:49:34 +01:00
2024-04-19 13:01:09 +01:00
2022-07-29 14:02:23 +01:00
2023-07-18 11:27:24 +01:00
2024-04-19 13:01:09 +01:00