Curious, why don't you just use the 1.5 javac but target 1.4? That
should do what you want... I think all you will need to do is this:
<javac srcdir="src" destdir="classes" source="1.4" target="1.4"/>
Christian Schröder wrote:
Hi list,
I have some projects that should be compiled with javac 1.4 and some
that should be compiled with javac 1.5. Since I do not want to change
my environment between the projects, I have the JAVA_HOME variable set
to the 1.5 classpath and want ant to use the external 1.4 javac when
necessary. Unfortunately, I always get an "Error running
/usr/java/j2sdk1.4.2/bin/javac compiler".
I have been able to create a small example build file to reproduce
this problem:
<?xml version="1.0" encoding="UTF-8"?>
<project name="TestProject" default="default" basedir=".">
<target name="default">
<javac srcdir="src" destdir="classes" source="1.4" target="1.4"
fork="yes" executable="/usr/java/j2sdk1.4.2/bin/javac"/>
</target>
</project>
With verbose output I get the following stack trace:
/home/chschroe/deriva/projects/DerivaLibLogging/build-tmp.xml:4: Error
running /usr/java/j2sdk1.4.2/bin/javac compiler
at
org.apache.tools.ant.taskdefs.compilers.DefaultCompilerAdapter.executeExternalCompile(DefaultCompilerAdapter.java:509)
at
org.apache.tools.ant.taskdefs.compilers.JavacExternal.execute(JavacExternal.java:61)
at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:997)
at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:820)
at
org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:357)
at org.apache.tools.ant.Target.performTasks(Target.java:385)
at
org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)
at org.apache.tools.ant.Project.executeTarget(Project.java:1298)
at
org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
at org.apache.tools.ant.Main.runBuild(Main.java:698)
at org.apache.tools.ant.Main.startAnt(Main.java:199)
at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)
Caused by: java.io.IOException: java.io.IOException: Cannot allocate
memory
at java.lang.UNIXProcess.<init>(UNIXProcess.java:148)
at java.lang.ProcessImpl.start(ProcessImpl.java:65)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:451)
at java.lang.Runtime.exec(Runtime.java:591)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at
org.apache.tools.ant.taskdefs.Execute$Java13CommandLauncher.exec(Execute.java:828)
at org.apache.tools.ant.taskdefs.Execute.launch(Execute.java:445)
at org.apache.tools.ant.taskdefs.Execute.execute(Execute.java:459)
at
org.apache.tools.ant.taskdefs.compilers.DefaultCompilerAdapter.executeExternalCompile(DefaultCompilerAdapter.java:506)
... 20 more
The machine has several gigs of free memory and this test project is
really small. So what's the problem?
Some information about my environment:
Apache Ant version 1.7.0 compiled on December 13 2006
javac 1.5.0_12
javac 1.4.2_15
Thanks for all help!
Christian
--
Scot P. Floess
27 Lake Royale
Louisburg, NC 27549
252-478-8087 (Home)
919-754-4592 (Work)
Chief Architect JPlate http://sourceforge.net/projects/jplate
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