With xml namespaces like if:set you could exclude individual tasks.
http://ant.apache.org/manual/ifunless.html
<project>
<condition property="java10+">
<javaversion atleast="10"/>
</condition>
<target name="do-only-on-newer-versions" if="java10+">
...
</target>
<target name="compile">
<javah ... if:set="java10+" xmlns:if="ant:if"/>
<javac ... />
</target>
</project>
Jan
> -----Ursprüngliche Nachricht-----
> Von: Jaikiran Pai [mailto:jaiki...@apache.org]
> Gesendet: Dienstag, 7. Mai 2019 07:38
> An: user@ant.apache.org
> Betreff: Re: Skipping a javah task with Java 10 and higher
>
> Recent versions of Ant (starting 1.10.2) have a "javaversion"
> condition[1] which you can use to setup a "property" which can then be
> used with "if"/"unless" attribute on a target.
>
> Here's an example:
>
> <target name="the-one-which-has-javah-task" depends="check-java-
> version"
> unless="java10+">
> ...
> </target>
>
> <target name="check-java-version">
> <condition property="java10+">
> <javaversion atleast="10"/>
> </condition>
> </target>
>
> [1] https://ant.apache.org/manual/Tasks/conditions.html#javaversion
>
> -Jaikiran
>
> On 07/05/19 10:53 AM, 大平怜 wrote:
> > Hello,
> >
> > My build.xml has a javah task. Since it no longer works with Java 10
> > and higher, I added nativeHeaderDir to a javac task, and it is
> working fine.
> > However, I still want to keep the javah task, so that the same
> > build.xml works for older Java.
> >
> > How can I make ant skip the javah task only when running with Java 10
> > and higher? More generally, is there any way to switch the execution
> > path in build.xml, depending on the Java version? Or, is there any
> > other standard way to migrate a javah task from old Java to Java
> 10/11
> > with backward-compatibility being maintained? Appreciate your help.
> >
> >
> > Thanks,
> > Rei Odaira
> >
>
>
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