From 86ad5ee8278ffa3bd2cc461c9536a33afccecb9a Mon Sep 17 00:00:00 2001
From: Vivien Kraus <vivien@planete-kraus.eu>
Date: Thu, 18 Nov 2021 17:16:04 +0100
Subject: [PATCH] gnu: irrlicht: Fix build.

* gnu/packages/games.scm (irrlicht) [phase remove-<sys/systctl.h>]:
<sys/sysctl.h> has been removed from glibc, and it is not used, so remove it.
---
 gnu/packages/games.scm | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gnu/packages/games.scm b/gnu/packages/games.scm
index e01ad3c8d2..c80335a1ea 100644
--- a/gnu/packages/games.scm
+++ b/gnu/packages/games.scm
@@ -3568,6 +3568,10 @@ (define-public irrlicht
              ;; The actual source is buried a few directories deep.
              (chdir "source/Irrlicht/")
              #t))
+         (add-after 'chdir-to-source 'remove-<sys/sysctl.h>
+           (lambda _
+             (substitute* "COSOperator.cpp"
+               (("#include <sys/sysctl.h>") ""))))
          (add-after 'chdir-to-source 'fix-build-env
            (lambda* (#:key outputs #:allow-other-keys)
              (let ((out (assoc-ref outputs "out")))
-- 
2.34.0