Help: Modern compiler is not available.

[Brad Baker]

I don't undstand why I am geting this:
[javac] Modern compiler is not available - using classic compiler
Here is my build.xml

<?xml version = '1.0' encoding = 'windows-1252'?>
<project name="OIDServer" default="compile" basedir=".">
    <description>
        Build file for the Object ID server.
    </description>
    <!-- utilize predefined environment variables -->
    <property name="env" environment="env" value="env"/>
    <property name="J2EE_HOME" value="${env.J2EE_HOME}"/>
    <property name="JAVA_HOME" value="${env.JAVA_HOME}"/>
    <!--Set the output directories-->
    <property name="compile.outdir" value="classes"/>
    <property name="javadoc.outdir" value="javadoc"/>
    <!--Set the classpath-->
    <path id="classpath">
        <pathelement location="${JAVA_HOME}/jre/lib/rt.jar"/> 
        <pathelement location="${J2EE_HOME}/lib/j2ee.jar"/> 
        <pathelement location="${compile.outdir}"/>
    </path>
    <!--Set the source path-->
    <path id="srcpath">
        <pathelement location="src"/>
    </path>
    <target name="init">
  <echo message="BuildName: ${ant.project.name}" />
  <echo message="JavaHome: ${JAVA_HOME}" />
  <echo message="J2eeHome: ${J2EE_HOME}" />
  <echo message="BuildHome: ${basedir}" />
  <echo message="SourceHome: ${basedir}/src" /> 
  <echo message="BuildFile: ${ant.file}" />
  <echo message="BuildJVM: ${ant.java.version}" />
        <tstamp/>
    </target>
   <target name="compile" depends="init">
      <mkdir dir="${compile.outdir}"/>
      <!--Compile Java source files-->
      <javac destdir="${compile.outdir}" debug="on">
         <classpath refid="classpath"/>
         <src refid="srcpath"/>
      </javac>
   </target>
</project>

This is the full output:

  
Buildfile: build.xml
init:
     [echo] BuildName: OIDServer
     [echo] JavaHome: d:\java\jdk1.4.1
     [echo] J2eeHome: d:\java\j2sdkee1.3.1
     [echo] BuildHome: D:\dev
     [echo] SourceHome: D:\dev/src
     [echo] BuildFile: D:\dev\build.xml
     [echo] BuildJVM: 1.4
compile:
    [javac] Modern compiler is not available - using classic compiler
    [javac] Compiling 3 source files to D:\GameServe\classes
BUILD FAILED
D:\GameServe\build.xml:43: Cannot use classic compiler, as it is not available A
 common solution is to set the environment variable JAVA_HOME to your jdk direct
ory.
Total time: 3 seconds<project name="GameServeDemo" default="all" basedir=".">

My path is:
PATH=d:\java\jdk1.4.1\bin;d:\apache\ant-1.5.2\bin
So why does it say "Modern compiler is not available - using classic compiler"?
anyone?
Thanks,

[Andy Bowes]

Have you tried setting your JAVA_HOME environment variable as it suggests in the output ?

D:\GameServe\build.xml:43: Cannot use classic compiler, as it is not available A common solution is to set the environment variable JAVA_HOME to your jdk directory.

[Brad Baker]

Hello Andy,
My OS is Win2k with:
Set JAVA_HOME=d:\java\1.4.1
in my system environment.
I have:

  
<property name="JAVA_HOME" value="${env.JAVA_HOME}"/>
<echo message="JavaHome: ${JAVA_HOME}" />

in my build.xml and it gives me:
[echo] JavaHome: d:\java\jdk1.4.1
So as far as I can tell I have JAVA_HOME set.
What have I missed?

[Dennis Rosa]

Try this ..

<target name="compile" depends="init">
<javac srcdir="src"
destdir="build"
classpathref="siacc.class.path"
fork="true"
/>
</target>
ANT-Help....
Windows Note:When the modern compiler is used in unforked mode on Windows, it locks up the files present in the classpath of the <javac> task, and does not release them. The side effect of this is that you will not be able to delete or move those files later on in the build. The workaround is to fork when invoking the compiler.
Dennis