On the gcj-abi-2-dev-branch, gcj tries to open class files on which a class depends. If it fails to find these files a warning is generated. There is a flag to control this behaviour, flag_verify_invocations. If this flag is set to zero, gcj should neither try to open these files nor issue any warnings. However, there is no code to set or clear this flag. With -findirect-dispatch, this flag should default to zero.
Confirmed.
This is related to PR13606, which should probably be fixed at the same time.
Fixed with latest patches applied to branch.
Fixed on the mainline now by the merge of the BC branch.