Remove sysctl.h to fix build error

irrlicht.spec

@@ -1,7 +1,7 @@
 Name:           irrlicht
 Summary:        A high performance and free realtime 3D engine
 Version:        1.8.4
-Release:        11
+Release:        12
 License:        zlib
 URL:            http://irrlicht.sourceforge.net/
 Source0:        http://downloads.sourceforge.net/irrlicht/irrlicht-1.8.4.zip
@@ -10,6 +10,7 @@ Patch0002:      irrlicht-1.8-glext.patch
 Patch0003:      irrlicht18-libaesgm.patch
 Patch0004:      irrlicht-1.8-irrXML-shared-library.patch
 Patch0005:      irrlicht-1.8-fix-locale-decimal-points.patch
+Patch0006:      remove-sysctl.h.patch
 BuildRequires:  gcc-c++ libXxf86vm-devel mesa-libGL-devel mesa-libGLU-devel
 BuildRequires:  libjpeg-devel zlib-devel libaesgm-devel libpng-devel  bzip2-devel
 Provides:       irrlicht18 = %{version}-%{release}
@@ -103,6 +104,9 @@ popd
 %{_includedir}/irrlicht/{fast_atof.h,heapsort.h,irrArray.h,irrString.h,irrTypes.h,irrXML.h}
 
 %changelog
+* Sat Jun 26 2021 wangyue<wangyue92@huawei.com> - 1.8.4-12
+- Remove sysctl.h to fix build error
+
 * Mon Mar 09 2020 xuxijian<xuxijian@huawei.com> - 1.8.4-11
 - Add libIrrXML patch files
 

remove-sysctl.h.patch

@@ -0,0 +1,31 @@
+From 5382142d37730f6758753b758c91e257ffd5892c Mon Sep 17 00:00:00 2001
+From: Romain Naour <romain.naour@gmail.com>
+Date: Sun, 9 Apr 2017 22:20:19 +0200
+Subject: [PATCH] remove sys/sysctl.h
+
+With musl irrlicht doesn't build due to missing sys/sysctl.h
+
+fatal error: sys/sysctl.h: No such file or directory
+
+From [1]
+"sysctl does not work, and NEVER worked. using it is bogus.
+it was a bogus experimental syscall that was deprecated before
+it was ever used (basically, a broken binary version of
+/proc/sys, without any stability between kernel versions for
+what the binary constants meant)."
+
+[1] https://devsonacid.wordpress.com/tag/musl/
+
+Signed-off-by: Romain Naour <romain.naour@gmail.com>
+
+diff -ruN irrlicht-1.8.4-bak/source/Irrlicht/COSOperator.cpp irrlicht-1.8.4/source/Irrlicht/COSOperator.cpp
+--- irrlicht-1.8.4-bak/source/Irrlicht/COSOperator.cpp	2012-11-04 02:07:52.000000000 +0800
++++ irrlicht-1.8.4/source/Irrlicht/COSOperator.cpp	2021-06-26 15:26:03.935312943 +0800
+@@ -13,7 +13,6 @@
+ #include <unistd.h>
+ #ifndef _IRR_SOLARIS_PLATFORM_
+ #include <sys/types.h>
+-#include <sys/sysctl.h>
+ #endif
+ #endif
+