ant seems to be using wrong defaults source/target and so making the adop-openjdk readme-incompatible

[Jiri Vanek]

Hello!

Although changeset
http://hg.openjdk.java.net/code-tools/jtreg/rev/9664f5b2338c
clearly says "7901611: jtreg should use JDK 7 as a baseline for executing jtreg itself"

It is actually enforcing 1.8... for ant.


As readme: http://hg.openjdk.java.net/code-tools/jtreg/file/644163a82cae/README#l23 specifies the 
same, I believe

--- a/make/build.xml	Mon Aug 01 14:01:29 2016 -0700
+++ b/make/build.xml	Mon Aug 08 21:14:37 2016 +0200
@@ -171,7 +171,7 @@

      <target name="-compile-jtreg.classes">
          <mkdir dir="${build.classes.dir}"/>
-        <javac encoding="iso-8859-1" source="1.8" target="1.8"
+        <javac encoding="iso-8859-1" source="1.7" target="1.7"
              debug="true" debuglevel="source,lines"
              srcdir="${src.classes.dir}"
              destdir="${build.classes.dir}"



should be used.


I confess I did not tried the patch, but from nowhere else the values
[ https://adopt-openjdk.ci.cloudbees.com/job/jtreg/624/consoleFull ]

   [javac] '-sourcepath'
     [javac] '/scratch/jenkins/workspace/jtreg/src/share/classes'
     [javac] '-target'
     [javac] '1.8'
     [javac] '-encoding'
     [javac] 'iso-8859-1'
     [javac] '-g:source,lines'
     [javac] '-Xlint:all'
     [javac] '-source'
     [javac] '1.8'



Currently the sad fact is, that binaries from adopt-openjdk are incompatible with thirs own 
statement - jdk8 only.