Include the java-11-openjdk-portable.spec file with instructions on how to rebuild.

Related: RHEL-30918

README.md

@@ -1,9 +1,39 @@
-Package of LTS OpenJDK 11
-OpenJDK have release cadence of 6 months. but 3/4 of them are Short Term Supported for 6 months only. This package is designed to harbore them. Currently it is build on openJDK 11. LTSs (next is 15) will go as separate packages. 
+OpenJDK 11 is a Long-Term Support (LTS) release of the Java platform.
 
-JDK11 is last LTS release of Java platform. It is bringing many cool improvements - http://openjdk.java.net/projects/jdk/11/ and is landing to your Fedora. Where it will be maintained for several years. You will always be allowed to install Used LTSs in build root, and alongside via alternatives. 
+For a list of major changes from OpenJDK 8 (java-1.8.0-openjdk), see
+the upstream release page for OpenJDK 11 and the preceding interim
+releases:
 
-See announcement: http://mail.openjdk.java.net/pipermail/discuss/2017-September/004281.html
-See java SIG plans: https://jvanek.fedorapeople.org/devconf/2018/changesInjavaReleaseProcess.pdf
+* 9: https://openjdk.org/projects/jdk9/
+* 10: https://openjdk.java.net/projects/jdk/10/
+* 11: https://openjdk.java.net/projects/jdk/11/
 
-https://fedoraproject.org/wiki/Changes/java-11-openjdk-TechPreview
+# Rebuilding the OpenJDK package
+
+The OpenJDK packages are now created from a single build which is then
+packaged for different major versions of Red Hat Enterprise Linux
+(RHEL). This allows the OpenJDK team to focus their efforts on the
+development and testing of this single build, rather than having
+multiple builds which only differ by the platform they were built on.
+
+This does make rebuilding the package slightly more complicated than a
+normal package. Modifications should be made to the
+`java-11-openjdk-portable.specfile` file, which can be found with this
+README file in the source RPM or installed in the documentation tree
+by the `java-11-openjdk-headless` RPM.
+
+Once the modified `java-11-openjdk-portable` RPMs are built, they
+should be installed and will produce a number of tarballs in the
+`/usr/lib/jvm` directory. The `java-11-openjdk` RPMs can then be
+built, which will use these tarballs to create the usual RPMs found in
+RHEL. The `java-11-openjdk-portable` RPMs can be uninstalled once the
+desired final RPMs are produced.
+
+Note that the `java-11-openjdk.spec` file has a hard requirement on
+the exact version of java-11-openjdk-portable to use, so this will
+need to be modified if the version or rpmrelease values are changed in
+`java-11-openjdk-portable.specfile`.
+
+To reduce the number of RPMs involved, the `fastdebug` and `slowdebug`
+builds may be disabled using `--without fastdebug` and `--without
+slowdebug`.

java-11-openjdk.spec

@@ -373,7 +373,7 @@
 %global top_level_dir_name   %{origin}
 %global top_level_dir_name_backup %{top_level_dir_name}-backup
 %global buildver        7
-%global rpmrelease      3
+%global rpmrelease      4
 # Settings used by the portable build
 %global portablerelease 2
 %global portablerhel 8
@@ -825,6 +825,8 @@ exit 0
 %define files_jre_headless() %{expand:
 %license %{_jvmdir}/%{sdkdir -- %{?1}}/legal
 %doc %{_defaultdocdir}/%{uniquejavadocdir -- %{?1}}/NEWS
+%doc %{_defaultdocdir}/%{uniquejavadocdir -- %{?1}}/README.md
+%doc %{_defaultdocdir}/%{uniquejavadocdir -- %{?1}}/java-%{featurever}-openjdk-portable.specfile
 %dir %{_sysconfdir}/.java/.systemPrefs
 %dir %{_sysconfdir}/.java
 %dir %{_jvmdir}/%{sdkdir -- %{?1}}
@@ -1337,6 +1339,10 @@ Source17: nss.fips.cfg.in
 # Ensure translations are available for new timezones
 Source18: TestTranslations.java
 
+# Include portable spec and instructions on how to rebuild
+Source19: README.md
+Source20: java-%{featurever}-openjdk-portable.specfile
+
 # Setup variables to reference correct sources
 %global releasezip %{_jvmdir}/%{name}-%{version}-%{portablerelease}.portable.unstripped.jdk..%{_arch}.tar.xz
 %global staticlibzip %{_jvmdir}/%{name}-%{version}-%{portablerelease}.portable.static-libs..%{_arch}.tar.xz
@@ -1802,6 +1808,9 @@ The %{origin_nice} %{featurever} API documentation compressed in a single archiv
 %prep
 
 echo "Preparing %{oj_vendor_version}"
+echo "Vendor: %{oj_vendor}"
+echo "Vendor URL: %{oj_vendor_url}"
+echo "Vendor Bug URL: %{oj_vendor_bug_url}"
 
 # Using the echo macro breaks rpmdev-bumpspec, as it parses the first line of stdout :-(
 %if 0%{?stapinstall:1}
@@ -2127,10 +2136,11 @@ jdk_image=$(pwd)/%{installoutputdir -- ${suffix}}
 docdir=$(pwd)/%{installoutputdir -- "-docs"}
 miscdir=%{installoutputdir -- "-misc"}
 
-# Install release notes
+# Install release notes and rebuild instructions
 commondocdir=${RPM_BUILD_ROOT}%{_defaultdocdir}/%{uniquejavadocdir -- $suffix}
 install -d -m 755 ${commondocdir}
 mv ${jdk_image}/NEWS ${commondocdir}
+cp -a %{SOURCE19} %{SOURCE20} ${commondocdir}
 
 # Install the jdk
 mkdir -p $RPM_BUILD_ROOT%{_jvmdir}
@@ -2498,6 +2508,10 @@ end
 %endif
 
 %changelog
+* Wed Apr 26 2023 Andrew Hughes <gnu.andrew@redhat.com> - 1:11.0.19.0.7-4
+- Include the java-11-openjdk-portable.spec file with instructions on how to rebuild.
+- Related: RHEL-30918
+
 * Wed Apr 26 2023 Andrew Hughes <gnu.andrew@redhat.com> - 1:11.0.19.0.7-3
 - Revert "Restore native build for x86 as there is no portable build"
 - Reintroduce useful cleanups from x86 reversion