Hello Please, how do I link some 'inherited' objects? Explained: I want to build simple test program, which uses log4j (building it with Sun's JDK into .class bytecode and running inside their VM works ok) gcj -o logTest --main=logTest --classpath=./log4j.jar logTest.java I get: /tmp/ccmlhniA.o: In function `logTest::__U3c_clinit__U3e_()': logTest.java:(.text+0x16): undefined reference to `org::apache::log4j::Category::getInstance(java::lang::String*)' /tmp/ccmlhniA.o: In function `logTest::main(JArray<java::lang::String*>*)': logTest.java:(.text+0x295): undefined reference to `org::apache::log4j::Priority::class$' logTest.java:(.text+0x2ad): undefined reference to `org::apache::log4j::Priority::DEBUG' /tmp/ccmlhniA.o:(.data+0x188): undefined reference to `org::apache::log4j::Category::class$' collect2: ld returned 1 exit status libgcj.jar is linked by default, log4.jar was added by me. Is there neccessity of some additional libraries, which are not included in log4j but maybe I can get them from some jvm's libs? Any idea please? Thanks Bu