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The main feature of gcj is that it can compile programs written in the Java programming language to native code. Most extensions that have been added are to facilitate this functionality.
libgcj
system classloader. When trying to load a class
gnu.pkg.SomeClass
the system classloader will first try to load the
shared library lib-gnu-pkg-SomeClass.so, if that fails to load the
class then it will try to load lib-gnu-pkg.so and finally when the
class is still not loaded it will try to load lib-gnu.so. Note that
all `.'s will be transformed into `-'s and that searching
for inner classes starts with their outermost outer class. If the class
cannot be found this way the system classloader tries to use
the libgcj
bytecode interpreter to load the class from the standard
classpath.