Thread: ./configure --with-java fails

On Tue, 6 Jul 2004, Markus Wollny wrote:

> I am trying to build PostgreSQL 7.4.3 with Java enabled; I've got Apache
> Ant version 1.5 and j2sdk1.4.1_05 installed:
>
>     [javac] Modern compiler not found - looking for classic compiler
>
> BUILD FAILED
> file:/usr/src/postgresql/postgresql-7.4.3/conftest.xml:3: Cannot use
> classic compiler, as it is not available.  A common solution is to set
> the environment variable JAVA_HOME to your jdk directory.

Your setup looks good, perhaps changing the configure script to run ant
with -debug would help?

> Help would be very much appreciated; on second thoughts: Is it at all
> necessary to build the JDBC-driver myself or can I safely use the
> precompiled .jar-file from http://jdbc.postgresql.org/download.html on
> my clients? And if I compile without the --with-java, will the resulting
> PostgreSQL-server-installation have any shortcomings in integrating with
> JDBC-applications? What exactly are the "Java/JDBC tools" aside from the
> JDBC-driver jar-file?

Configuring with --with-java does nothing other than build the JDBC
driver.  There used to be some additional java tools, but these were
removed before the 7.4 release.  The provided jar files are no different
than what you would build yourself so it's fine to use them.

Kris Jurka

> -----Ursprüngliche Nachricht-----
> Von: pgsql-general-owner@postgresql.org
> [mailto:pgsql-general-owner@postgresql.org] Im Auftrag von Kris Jurka
> Gesendet: Dienstag, 6. Juli 2004 13:11
> An: Markus Wollny
> Cc: pgsql-general@postgresql.org
> Betreff: Re: [GENERAL] ./configure --with-java fails

> Your setup looks good, perhaps changing the configure script
> to run ant with -debug would help?

Thanks, now I got loads and loads of debug output, so I'm still confused, albeit on a higher level...  :)

<!--- config.log excerpt starts here --->
configure:3222: /usr/bin/ant -debug -buildfile conftest.xml 1>&2
Apache Ant version 1.5 compiled on October 15 2002
Buildfile: conftest.xml
Detected Java version: 1.3 in: /usr/lib/SunJava2-1.3.1/jre
Detected OS: Linux
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Could not load class (org.apache.tools.ant.taskdefs.optional.perforce.P4Reopen) for task p4reopen
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Could not load class (org.apache.tools.ant.taskdefs.optional.ejb.WLRun) for task wlrun
Could not load class (org.apache.tools.ant.taskdefs.optional.perforce.P4Label) for task p4label
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Could not load class (org.apache.tools.ant.taskdefs.optional.ide.VAJExport) for task vajexport
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Could not load class (org.apache.tools.ant.taskdefs.optional.perforce.P4Add) for task p4add
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Could not load class (org.apache.tools.ant.taskdefs.optional.ejb.DDCreator) for task ddcreator
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Setting ro project property: ant.version -> Apache Ant version 1.5 compiled on October 15 2002
Setting ro project property: ant.file -> /usr/src/postgresql/postgresql-7.4.3/conftest.xml
parsing buildfile conftest.xml with URI = file:/usr/src/postgresql/postgresql-7.4.3/conftest.xml
Setting ro project property: ant.project.name -> conftest
Adding reference: conftest -> org.apache.tools.ant.Project@3fea1d
Project base dir set to: /usr/src/postgresql/postgresql-7.4.3
 +Target: conftest
   +Task: javac
Build sequence for target `conftest' is [conftest]
Complete build sequence is [conftest]

conftest:
fileset: Setup scanner in dir /usr/src/postgresql/postgresql-7.4.3 with patternSet{ includes: [conftest.java] excludes:
[]} 
    [javac] conftest.java added as /usr/src/postgresql/postgresql-7.4.3/conftest.class doesn't exist.
    [javac] Compiling 1 source file
    [javac] Modern compiler not found - looking for classic compiler
    [javac] Using classic compiler
    [javac] Compilation arguments:
    [javac] '-classpath'
    [javac]
'/opt/jakarta/ant/lib/xml-apis.jar:/opt/jakarta/ant/lib/xercesImpl.jar:/opt/jakarta/ant/lib/optional.jar:/opt/jakarta/ant/lib/ant.jar'
    [javac] '-sourcepath'
    [javac] '/usr/src/postgresql/postgresql-7.4.3'
    [javac] '-g:none'
    [javac]
    [javac] The ' characters around the executable and arguments are
    [javac] not part of the command.
    [javac] File to be compiled:
    [javac]     /usr/src/postgresql/postgresql-7.4.3/conftest.java

BUILD FAILED
file:/usr/src/postgresql/postgresql-7.4.3/conftest.xml:3: Cannot use classic compiler, as it is not available.  A
commonsolution is to set the environment v 
ariable JAVA_HOME to your jdk directory.
        at org.apache.tools.ant.taskdefs.compilers.Javac12.execute(Javac12.java:110)
        at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:840)
        at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:682)
        at org.apache.tools.ant.Task.perform(Task.java:317)
        at org.apache.tools.ant.Target.execute(Target.java:309)
        at org.apache.tools.ant.Target.performTasks(Target.java:334)
        at org.apache.tools.ant.Project.executeTarget(Project.java:1306)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1250)
        at org.apache.tools.ant.Main.runBuild(Main.java:610)
        at org.apache.tools.ant.Main.start(Main.java:196)
        at org.apache.tools.ant.Main.main(Main.java:235)

Total time: 2 seconds
configure:3225: $? = 1
configure: failed java program was:
public class conftest {
    int testmethod(int a, int b) {
        return a + b;
    }
}
configure: failed build file was:
<project name="conftest" default="conftest">
 <target name="conftest">
  <javac srcdir="." includes="conftest.java">
  </javac>
 </target>
</project>
configure:3241: result: no
configure:3245: error: ant does not work
<!--- End of config.log excerpt --->

I have added /opt/jakarta/ant/lib/ant.jar to the CLASSPATH, but that didn't help either. I don't know what to make of
these"Could not load class (org.apache.tools.ant.*" messages... 

> Configuring with --with-java does nothing other than build
> the JDBC driver.  There used to be some additional java
> tools, but these were removed before the 7.4 release.  The
> provided jar files are no different than what you would build
> yourself so it's fine to use them.

Okay, so I guess if all else fails, I'll give up on building the driver myself and use the official pre-compiled one.

Thanks for your help!

Kind regards,

   Markus