GCC GCJ needs ECJ and Other Libraries?

So I just downloaded mingw-w64-bin_i686-mingw_20110410.zip from here (GCC 4.7 apparently), and discovered it had a very recent version of the GCJ compiler.

I tried using it, but apparently gcj requires ecj1.exe, which is the Eclipse compiler for Java... so, where do I find a compatible version of the binaries of ECJ and the associated Java libraries tha开发者_运维技巧t are needed (libgcj, etc.)?

Ideally this would be found on the MinGW-w64 project page, but it doesn't seem to exist.

(I've already tried copying them from a slightly older GCC version; it doesn't work.)

The cause for an openSUSE version of the gcc is basically this: If the configure step of the compilation of gcc did not find the ecj.jar file, ecj1 will be missing at the time when gcj, which has just been build, is called. ecj.jar can be taken from ftp://sourceware.org/pub/java/ecj-4.8.jar for example.

The two options are:

i) Put ecj.jar in $HOME/share/java/ecj.jar, reconfigure gcc with ./configure .... --with-ecj-jar=$HOME/java/ecj.jar and recompile gcc. Future compilations with that gcc will not require ecj1 .

ii) Put ecj.jar in $HOME/share/java/ecj.jar and create ecj1(.exe) through a compilation like gcj -o$HOME/bin/ecj1(.exe) --main=org.eclipse.jdt.internal.compiler.batch.GCCMain $HOME/share/java/ecj.jar assuming that the $HOME/bin is in the PATH for subsequent calls of gcj.

The thing that is actually "broken" here the fact that gcc 4.8.* is not shipped by default with ecj.jar at some standard place.

That is a very old version of a MinGW-w64 toolchain.

I would suggest downloading one of my builds, I've had reports of gcj working (without libgcj, which does not work on Windows), although I can't seem to find a link to the discussion I had long ago with a user. The user's case had something to do with creating a JNI interface or something, which didn't require libgcj.

My old builds can be found here for 32-bit and here for 64-bit. I checked the 4.8 release build, and it contains the gcj compiler.

Would you be opposed to downloading the source and building it? I looked over the build doc in basic and advanced build docs. I didn't see anything about the GCJ compiler or ECJ, but you'll need gcc 4.5.1 in order to build it.