On 17.12.05 13:28:27, Michael Koch wrote: > On Sat, Dec 17, 2005 at 12:09:08PM +0100, Andreas Pakulat wrote: > > 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? > > Only when using GCJ to run Eclipse and eclipse-ecj-gcj is installed.
Ok, got that installed. > Eclipse just calls the main ECJ class inside itself and SUN is not > capable of using the native jars. Hmm, so when running eclipse with gcj it automatically uses ecj-gcj when the eclipse-ecj-gcj package is installed? I just want to be sure I get this right. > > > > 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. > > You can use /usr/lib/jvm/java-gcj as JAVA_HOME. When java-gcj-compat is > install there is a complete JRE. When java-gcj-compat-dev is installed > too there is a complete SDK. Thanks, that works very well... Andreas -- Give him an evasive answer. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
