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https://issues.apache.org/jira/browse/XERCESJ-1707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16923281#comment-16923281
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Mukul Gandhi commented on XERCESJ-1707:
---------------------------------------
I've been able to find a little bit of resolution about this bug report. I've
done my study on XercesJ trunk. Following is what we need to do, to build
Xerces when working with JDK 9, 10, 11 or 12 (I've tested with Oracle JDKs for
these versions):
1) In the Xerces file XJavac.java (location tools/src), within method
definition "public void execute()", comment the entire thing
if(isJDK14OrHigher()) { ... }. I feel, due to the main reason being that system
property sun.boot.class.path returns null with JDKs 9 and above. This shall
solve the problem for Xerces builds with Oracle JDKs 9 and above, but I guess
Xerces will not build fine when on certain JDKs that the code
if(isJDK14OrHigher()) { ... } solves.
2) In the file build.xml (at the root of source code), in the Ant target
<target name="compile" , add org/apache/html/dom/** to excludes of <xjavac ...
This is because, JDKs 9 and above interface signatures are different for many
of the JDK interfaces implemented by Xerces classes at location
org/apache/html/dom/. Excluding org/apache/html/dom/** from Xerces solves the
problem for build with JDK 9 and above, but I imagine Xerces users who depend
on the Xerces classes org/apache/html/dom/** won't get this functionality.
I imagine that, an ideal Xerces build solution that utilizes above findings,
should conditionally build with JDKs ranging from 1.3 upto 12.
> Unable to build xercesImpl.jar with java 11
> -------------------------------------------
>
> Key: XERCESJ-1707
> URL: https://issues.apache.org/jira/browse/XERCESJ-1707
> Project: Xerces2-J
> Issue Type: Bug
> Components: Build
> Affects Versions: 2.12.0
> Reporter: Thomas Pasch
> Priority: Major
>
> I'm unable to build xercesImpl.jar with Java 11 even if I set source and
> target version:
> {{> ant -v -d -Dant.java.version=1.8 clean jar}}
> {{...}}
> {{ [xjavac] Fatal Error: Unable to find package java.lang in classpath or
> bootclasspath}}
> {{BUILD FAILED}}
> {{/home/tpasch/scm/db-toolchain/submodules/xerces2-j/build.xml:311: Compile
> failed; see the compiler error output for details.}}
> {{ at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:1425)}}
> {{ at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:1133)}}
> {{ at org.apache.xerces.util.XJavac.execute(Unknown Source)}}
> {{ at
> org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)}}
> {{ at jdk.internal.reflect.GeneratedMethodAccessor4.invoke(Unknown
> Source)}}
> {{ at
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)}}
> {{ at java.base/java.lang.reflect.Method.invoke(Method.java:566)}}
> {{ at
> org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:99)}}
> {{ at org.apache.tools.ant.Task.perform(Task.java:350)}}
> {{ at org.apache.tools.ant.Target.execute(Target.java:449)}}
> {{ at org.apache.tools.ant.Target.performTasks(Target.java:470)}}
> {{ at
> org.apache.tools.ant.Project.executeSortedTargets(Project.java:1388)}}
> {{ at org.apache.tools.ant.Project.executeTarget(Project.java:1361)}}
> {{ at
> org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)}}
> {{ at org.apache.tools.ant.Project.executeTargets(Project.java:1251)}}
> {{ at org.apache.tools.ant.Main.runBuild(Main.java:834)}}
> {{ at org.apache.tools.ant.Main.startAnt(Main.java:223)}}
> {{ at org.apache.tools.ant.launch.Launcher.run(Launcher.java:284)}}
> {{ at org.apache.tools.ant.launch.Launcher.main(Launcher.java:101)}}
> The problem seems to be related to xerces own implementation of java compile,
> i.e. xjavac.
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