Bug#874643: Mis-detects Java 9 at "runtime"

[Chris West]

Package: libgluegen2-build-java
Version: 2.3.2-5
Severity: normal
User: debian-java at lists.debian.org
Usertags: default-java9

This package is used while building other packages. It contains some
build helper scripts. These scripts fail to detect Java 9 correctly, so
error out, breaking the build of other packages.

...
<fail message="Unsupported Target Java version (sourcelevel):
${target.sourcelevel}. Make sure that the version of the Java compiler
is 1.6 (6.0) or greater.">

<contains string="${target.sourcelevel}" substring="1.9"
casesensitive="false" />
...

The value has been changed to 9, not 1.9.
Fix might look like:
https://ssl.icu-project.org/trac/attachment/ticket/13330/icu4j.diff

..or see if someone has put a better solution on the wiki:
https://wiki.debian.org/Java/Java9Pitfalls



Build log from an example broken package, libjogl2-java:

jogamp.env.validation:
     [echo] ant.version                Apache Ant(TM) version 1.9.9 compiled on June 29 2017
     [echo] ant.java.version           9
     [echo] java.version               9-Debian
     [echo] java.home                  /usr/lib/jvm/java-9-openjdk-amd64
     [echo] jvmJava.exe                /usr/lib/jvm/java-9-openjdk-amd64/bin/java
Property "env.JAVA7_EXE" has not been set
Property "env.JAVA7_EXE" has not been set
Property "jvmJava7.exe" has not been set
     [echo] jvmJava7.exe               ${jvmJava7.exe}

BUILD FAILED
/usr/share/gluegen2/make/jogamp-env.xml:48: Unsupported Java version: 9. Make sure that the version of the Java compiler is 1.6 (6.0) or greater.
	at org.apache.tools.ant.taskdefs.Exit.execute(Exit.java:164)
	at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:293)


Cheers,
Chris.