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* gcj.texi (Compatibility): Add Limitations and Extensions section.

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Mark Wielaard 2002-10-11 22:12:48 +00:00 committed by Mark Wielaard
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gcc/java/ChangeLog
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@ -1,3 +1,7 @@
2002-10-11 Mark Wielaard <mark@klomp.org>
* gcj.texi (Compatibility): Add Limitations and Extensions section.
2002-10-10 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* class.c (JAVA_TREEHASHHASH_H): Use htab_hash_pointer.

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gcc/java/gcj.texi
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@ -487,14 +487,21 @@ specifications. However, limited manpower and incomplete and unclear
documentation work against us. So, there are caveats to using
@command{gcj}.
@menu
* Limitations::
* Extensions::
@end menu
@node Limitations
@section Standard features not yet supported
This list of compatibility issues is by no means complete.
@itemize @bullet
@item
@command{gcj} implements the JDK 1.1 language. It supports inner classes,
though these are known to still be buggy. It does not yet support the
Java 2 @code{strictfp} keyword (it recognizes the keyword but ignores
it).
@command{gcj} implements the JDK 1.2 language. It supports inner classes
and the new 1.4 @code{assert} keyword. It does not yet support the Java 2
@code{strictfp} keyword (it recognizes the keyword but ignores it).
@item
@code{libgcj} is largely compatible with the JDK 1.2 libraries.
@ -510,6 +517,31 @@ affects you, it probably makes sense to report it so that we can discuss
the appropriate response.
@end itemize
@node Extensions
@section Extra features unique to gcj
The main feature of @command{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.
@itemize @bullet
@item
@command{gcj} makes it easy and efficient to mix code written in Java and C++.
@xref{About CNI}, for more info on how to use this in your programs.
@item
When you compile your classes into a shared library they can be automatically
loaded by the @code{libgcj} system classloader. When trying to load a class
@code{gnu.pkg.SomeClass} the system classloader will first try to load the
shared library @file{lib-gnu-pkg-SomeClass.so}, if that fails to load the
class then it will try to load @file{lib-gnu-pkg.so} and finally when the
class is still not loaded it will try to load @file{lib-gnu.so}. Note that
all @samp{.}s will be transformed into @samp{-}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 @code{libgcj} bytecode interpreter to load the class from the standard
classpath.
@end itemize
@node Invoking gcjh
@chapter Invoking gcjh