I think the problem is not in JVMs incompatibility but in the fact that
Eclipse uses its own Java compiler which is not the same as the one run
by Ant (or outside Eclipse in general). I am not sure what the
incompatibility between .class files is, but we experience it as well. I
would suggest switching Eclipse to use external compiler, in order to
eliminate the difference. I don't think massaging compiler options will
help here. Or maybe even better - simply refrain from using the mixed
output (this is what we do). Either compile everything with Eclipse or
with Ant would be my advice.
Milosz
Mark Modrall wrote:
I found the Java Compiler section of the Properties dialog, but as I say
it doesn't help clarify why the .class files it produces are
incompatible with the jdk javac ones.
Our eclipse project has
Compiler compliance level: 5.0
Use default compliance settings
Classfile generation:
Add variable attributes to generated class files
Add line number attributes to generated classfiles
Add source file name to generated class file
Preserve unused local variables
Our ant <javac> task ends up using
Jdk1.5.0_06\javac -deprecation -d <output path> -g *.java
As I say, the net result is that the eclipse .class files won't work
with the javac ones but I'm at a loss to figure out which options are
creating the incompatibility.
Thanks
-mark
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-----Original Message-----
From: Shay Thompson [mailto:[EMAIL PROTECTED]
Sent: Friday, September 29, 2006 3:16 PM
To: Ant Users List
Subject: Re: ant and eclipse?
Each Java Project in Eclipse has a JVM assigned to the project. If you
right-click the project name and select properties you can find it in
there.
Mark Modrall wrote:
Not sure where I'd check that. I know that ant is using jdk1.5.0.6
but
I don't know how to look into what eclipse is using...
Thanks
-mark
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-----Original Message-----
From: Shay Thompson [mailto:[EMAIL PROTECTED]
Sent: Friday, September 29, 2006 2:53 PM
To: Ant Users List
Subject: Re: ant and eclipse?
The first thing I'd look at is what JVM is Eclipse using to compile
the
code vs. what JVM is used when on the command-line.
-Shay
Mark Modrall wrote:
Hi...
We do all of our development in eclipse and use ant 1.6.5
for our nightly builds on another machine. But someone just tried to
invoke ant to run our junit tests on his dev machine. He went into
the
eclipse project directory and executed the ant build.xml file there,
but
the javac task on the junit tests failed with a strange compile error
against one of the base classes to be tested (a "bad class file"
error
on the use of generics).
Finally narrowed it down to the fact that the .class
files
produced by eclipse aren't compatible with the class files produced
by
<javac>. If I recompile the base classes from the command line using
javac, then the junit test compiles. The problem is that it's hard
to
map what options eclipse is using to javac commandline parameters, so
I
can't tell what is causing the incompatibility.
Eclipse has a Run As... option for ant projects but when
I
try to run it from inside eclipse, it says it doesn't know about
<junit>.
First, anyone know how to tell what the two compilers
don't
like about each other? And second, how does one get eclipse to run
ant
builds?
Thanks
-Mark
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