[bonzini]

Since there is now OpenJDK, there was no reason to keep working on it, and both GCJ and the associated class libraries didn't follow the evolution in the Java language. In the beginning GCJ became only an ahead-of-time bytecode compiler, with the Java->bytecode translation done using ecj; but ultimately there was no reason to keep it around at all and it was deleted in GCC 7.

[pjmlp]

Ahead of time native code compiler.

It was kept around for a long time after everyone went to OpenJDK, because it was the only project with certain unit tests for GCC code paths, when that was eventually sorted out, it was when they dropped it.

[bonzini]

I meant it compiled bytecode to native ahead of time. There was also a source to native part which was removed first.