[zeromq-dev] Build fails with "class file has wrong version" error.

[Amit Chavan]

I am trying to do an rpmbuild on a Red Hat machine (2.6.18-238.el5) with
Java version 1.7, but the build fails with the exception:


make[2]: Entering directory `/usr/src/redhat/BUILD/jzmq-2.1.0/src'
> CLASSPATH=.:./.:$CLASSPATH javah -jni -classpath . org.zeromq.ZMQ
> error: cannot access org.zeromq.ZMQ
> bad class file: ./org/zeromq/ZMQ.class
> class file has wrong version 51.0, should be 49.0
> Please remove or make sure it appears in the correct subdirectory of the
> classpath.
> com.sun.tools.javac.util.Abort
>         at com.sun.tools.javac.comp.Check.completionError(Check.java:169)
>         at com.sun.tools.javadoc.DocEnv.loadClass(DocEnv.java:149)
>         at com.sun.tools.javadoc.RootDocImpl.<init>(RootDocImpl.java:77)
>         at
> com.sun.tools.javadoc.JavadocTool.getRootDocImpl(JavadocTool.java:156)
>         at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:330)
>         at com.sun.tools.javadoc.Start.begin(Start.java:128)
>         at com.sun.tools.javadoc.Main.execute(Main.java:66)
>         at com.sun.tools.javah.Main.main(Main.java:147)
> javadoc: error - fatal error



Is this a problem with the Java version? How should I proceed further?

-- 
Regards
Amit S. Chavan
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.zeromq.org/pipermail/zeromq-dev/attachments/20111019/fd0ea390/attachment.htm>