On 17.12.05 12:20:53, Michael Koch wrote: > On Sat, Dec 17, 2005 at 01:59:54AM +0100, Andreas Pakulat wrote: > > Hi, > > > > I do find it really great to have eclipse in debian (finally). Only I'm > > a little confused by all those new packages. So here come my questions, > > please someone shed some light on this: > > > > 1. Do I understand correctly that the "ecj" is a java 1.3/1.4 compiler > > that I can get either as "pure-java-version" (via eclipse-ecj) or as > > native binary (via eclipse-ecj-gcj). What benefits has ecj above gcj? > > ECJ from Eclipse 3.1.x is a Java 5.0 compliant compiler. It can handle > all language enhancements of Java 5.0. GCJ 4.0 and the upcoming 4.1 > cannot handle Java 5.0 stuff. They are more or less Java 1.4 compliant > with support for some classes from 5.0 but no language extensions. > GCJ can produce bytecode OR native code. ECJ can only produce bytecode. > A natively compiled ECJ is mostly faster in producing byecode than GCJ.
Hmm, how could I benefit from ecj from within eclipse? I mean, what do I need to change in the preferences so that Eclipse uses ecj-gcj to compile java classes? > > 2. Those eclipse-* packages that have a eclipse-*-gcj counterpart: Is > > the gcj-version (i.e. natively compiled plugins) faster? What are their > > benefit above the normal variant? > > When running eclipse with GCJ eclipse is much faster when the > eclipse-*-gcj packages are installed because GCJ only integrates a > simple interpreter, no JIT, and it can run the native code then. Hmm, that raises another question: How to do that? I can of course changed the java/javac alternatives to gcj but I'd like to leave the default java to be SUN's. Now specifying JAVA_HOME to be /usr doesn't work either, eclipse still uses "java" to execute. Using /usr/lib/jvm as JAVA_HOME gives an error message from eclipse telling me it's missing a binary. BTW: Why do I have 2 alternatives for "java" coming from GCJ? One points to /usr/lib/jvm/java-gcj/bin/java the other one pointing to /usr/bin/gij-wrapper-4.0. Andreas -- You will have a long and boring life. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
