2008/5/9 Robert Schuster <theBohemian@xxxxxxx>: > Hi, > I am maintaining the Java/Classpath stuff in OpenEmbedded and have > implemented a self-hosting toolchain like this: > > jikes 1.21 -> classpath 0.93 -> cacao 0.98 or jamvm 1.5.0 -> ecj-initial -> > classpath 0.9x (x >= 5) -> cacao 0.98+hg20071001 (or newer) -> > ecj(-bootstrap) > > ecj-initial is just ecj but taught to use classpath 0.93 as its class. > The set of Java classes from ECJ that are really compiled is the same as > found in the Debian package ecj-bootstrap. > > ecj-bootstrap is the Java compiler that uses classpath 0.9x and cacao > 0.98+hg20071001+. It is called -bootstrap because it only has the basic > 'javac' features, no ant integration and whatnot. Again the same classes > as Debian's ecj-bootstrap. > > This compiler is used to compile all the Java packages, while > ecj-initial only serves the bootstrapping purposes. > > Regards > Robert > > > Thanks Robert. Just to clarify, and as twisti implied, ecj-binary -> gcj-4.3 -> classpath 0.9x (x >= 5) -> cacao 0.98+hg20071001 (or newer) -> ecj(-bootstrap) is another option. gcj is the only solution I've seen so far that can give you a Java environment from nothing more than an ecj jar file. ecj-binary is obtained by a script in the contrib directory of gcc. -- Andrew :-) Support Free Java! Contribute to GNU Classpath and the OpenJDK http://www.gnu.org/software/classpath http://openjdk.java.net PGP Key: 94EFD9D8 (http://subkeys.pgp.net) Fingerprint: F8EF F1EA 401E 2E60 15FA 7927 142C 2591 94EF D9D8
