GC and GCJ

[Antonio Ake]

Hello. I have a question. It is possible to disable to use the garbage
collector in gcj?
I tried with --enable-java-gc=none but I had this message:

checking for garbage collector to use... configure: error: unrecognized
collector "none"

Another question: Last month I asked about --with-gc=none, does anobody
knows what kind of gc is used internally for gcc. It is Boehm's
garbage collector?