From 75fa589cb292133c4b5f47566c1b4de4b7bc4e35 Mon Sep 17 00:00:00 2001
From: Fabian Groffen <grobian@gentoo.org>
Date: Sat, 31 May 2025 10:49:28 +0200
Subject: [PATCH] lib: cpu-count - fix compilation using musl

The macros, types and symbols CPU_* and cpuset_t are not exposed in
musl's sched.h unless _GNU_SOURCE is set.

Signed-off-by: Fabian Groffen <grobian@gentoo.org>
---
 src/lib/cpu-count.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/lib/cpu-count.c b/src/lib/cpu-count.c
index 3eb38fa47d..a3e80e6c15 100644
--- a/src/lib/cpu-count.c
+++ b/src/lib/cpu-count.c
@@ -3,6 +3,8 @@
 
 #ifdef HAVE_SCHED_H
 #  define __USE_GNU
+/* _GNU_SOURCE: for musl's sched.h to expose cpuset/CPU_* */
+#  define _GNU_SOURCE
 #  include <sched.h>
 #  ifdef HAVE_SYS_CPUSET_H
 #    include <sys/cpuset.h>