From dd22ff85169ce252ee7629346940c6ae411a9b6c Mon Sep 17 00:00:00 2001
From: Jan Palus <atler@pld-linux.org>
Date: Wed, 24 Nov 2021 21:59:01 +0100
Subject: [PATCH] force locking during build

see https://lists.pld-linux.org/mailman/pipermail/pld-devel-en/2021-November/026415.html
---
 ignore-java-options.patch | 11 +++++++++++
 openjdk8.spec             |  6 ++++++
 2 files changed, 17 insertions(+)
 create mode 100644 ignore-java-options.patch

diff --git a/ignore-java-options.patch b/ignore-java-options.patch
new file mode 100644
index 0000000..1c4fd11
--- /dev/null
+++ b/ignore-java-options.patch
@@ -0,0 +1,11 @@
+--- jdk8u-jdk8u312-ga/common/autoconf/boot-jdk.m4.orig	2021-09-14 01:27:07.000000000 +0200
++++ jdk8u-jdk8u312-ga/common/autoconf/boot-jdk.m4	2021-11-24 21:50:44.335912643 +0100
+@@ -51,7 +51,7 @@
+             BOOT_JDK_FOUND=no
+           else
+             # Oh, this is looking good! We probably have found a proper JDK. Is it the correct version?
+-            BOOT_JDK_VERSION=`"$BOOT_JDK/bin/java" -version 2>&1 | head -n 1`
++            BOOT_JDK_VERSION=`"$BOOT_JDK/bin/java" -version 2>&1 | grep -v _JAVA_OPTIONS | head -n 1`
+ 
+             # Extra M4 quote needed to protect [] in grep expression.
+             [FOUND_VERSION_78=`echo $BOOT_JDK_VERSION | grep  '\"1\.[78]\.'`]
diff --git a/openjdk8.spec b/openjdk8.spec
index a4aa4f2..256d97c 100644
--- a/openjdk8.spec
+++ b/openjdk8.spec
@@ -57,6 +57,7 @@ Patch10:	link-with-as-needed.patch
 Patch11:	aarch32.patch
 Patch12:	atomic.patch
 Patch13:	hotspot-disable-werror.patch
+Patch14:	ignore-java-options.patch
 URL:		http://openjdk.java.net/
 BuildRequires:	/usr/bin/jar
 BuildRequires:	alsa-lib-devel
@@ -453,6 +454,7 @@ done
 %patch12 -p1
 %endif
 %patch13 -p1
+%patch14 -p1
 
 %build
 # Make sure we have /proc mounted - otherwise idlc will fail later.
@@ -464,6 +466,10 @@ fi
 unset JAVA_HOME
 unset CLASSPATH
 
+# force locking irrespective of cpu count determined based on /proc and /sys contents
+# https://lists.pld-linux.org/mailman/pipermail/pld-devel-en/2021-November/026415.html
+export _JAVA_OPTIONS=-XX:+AssumeMP
+
 mkdir -p build-bin
 export PATH="$(pwd)/build-bin:$PATH"
 
-- 
2.44.0