Slight differences in the contents of stack traces cause the unit tests to fail when run under gcj. The "at" lines in stack traces are preceded by spaces in GCJ where the expectation is that there is an initial tab character. Also, libgcj.so.7 appears in places where the tests expected either Compiled Code or Native Code.
Committed in rev 533171. After fixes, two DailyRollingFileAppender tests will fail, but that is either a runtime bug or will need to be logged as a different issue.
Committed rev 533183 to explicitly set thread names to get test to work with JRockit.