From 2e5d6a089acf5c5e1a9398ba0e31cb753f724913 Mon Sep 17 00:00:00 2001
From: Mikhail Novosyolov <m.novosyolov@rosalinux.ru>
Date: Fri, 27 Nov 2020 16:24:40 +0300
Subject: [PATCH] Off multithreading by default on 32 bit arches

---
 xz.spec | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/xz.spec b/xz.spec
index f236bff..fc4ed9e 100644
--- a/xz.spec
+++ b/xz.spec
@@ -8,7 +8,7 @@
 Summary:	XZ utils
 Name:		xz
 Version:	5.2.5
-Release:	1
+Release:	2
 License:	Public Domain
 Group:		Archiving/Compression
 Url:		http://tukaani.org/xz/
@@ -87,6 +87,15 @@ Devel libraries & headers for liblzma.
 %prep
 %autosetup -p1
 
+# Patch3 turns on multithreading by default, but there are memory limits on 32 bit
+# and xz(1) and liblzma do not control it by themselves
+# https://bugzilla.redhat.com/show_bug.cgi?id=1196786
+# https://github.com/rpm-software-management/rpm/commit/a60f36a55cff3331e8bef3a1ab95c87d313911bb
+# It makes xz fail in various places, e.g. when building the Linux kernel
+%if "%{__isa_bits}" != "64"
+%patch3 -p1 -R
+%endif
+
 %build
 export CONFIGURE_TOP=`pwd`
 mkdir objs