Dynamically loaded modules

[David Marceau]

Tom Tromey wrote:
> 
> >>>>> "Jim" == jim  <jim@weathercom.com> writes:
> 
> Jim> How well do programs compiled with gcj handel serialized objects
> Jim> and JavaBeans?  I'm working on a app that needs to load modules
> Jim> on startup to modify it's GUI and behavior.  Any ideas how gcj
> Jim> would handle that?
> 
> gcj serialization is compatible with the JDK.  We believe it is
> complete, but you will probably find the occasional bug.
> 
> I don't know anything about beans.  gcj doesn't have any java-style
> GUI capability (no AWT or Swing -- but there is a gnome-gcj).
> 
> libgcj can load bytecode just like other VMs, at least on platforms
> where the interpreter works (x86, alpha, ppc, ia64).  libgcj can also
> load precompiled java code (shared objects).
> 
> Tom
Hi there Mr. Tromey :)

Being that you're talking about loading shared objects with libgcj, I
have a question.

Question:
I have libsampNat.so which contains an CNI-based servic(not JNI) that I
compiled with gcj -shared.
How do I run gij in order to have sample.class loadLibrary("sampNat")
like the jni example gets loaded up in the gcj/JNI example in the gcj
faq.

The files in question are attached.

Thanks for taking the time.
--
Santé bonheur :)
David Marceau
sample.java
sampNat.cc
runit2.scr
Makefile
sample.h

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#GPLUSPLUS_INCLUDE_DIR=/root/testlibjava/gcc/include:/root/testlibjava/gcc/libjava/include:/root/testlibjava/gcc/libjava:/root/testlibjava/gcc/libjava/gcj:/root/testlibjava/gcc/include/gcj:/root/testlibjava/compile/objdir/i686-pc-linux-gnu/libjava/include:/root/testlibjava/compile/objdir/i686-pc-linux-gnu/libjava:$GPLUSPLUS_INCLUDE_DIR
CLASSPATH=/root/testlibjava/gcc/share/libgcj.jar
LD_LIBRARY_PATH=/root/testlibjava/gcc/lib:.:$LD_LIBRARY_PATH

libsampNat.so: sampNat.o
	echo "Making libsampNat.so..."
	/root/testlibjava/gcc/bin/gcj \
	-I/root/testlibjava/gcc/libjava/include \
	-I/root/testlibjava/gcc/libjava \
	-I/root/testlibjava/gcc/libjava/gcj \
	-I/root/testlibjava/gcc/include/gcj \
	-I/root/testlibjava/compile/objdir/i686-pc-linux-gnu/libjava/include \
	-I/root/testlibjava/compile/objdir/i686-pc-linux-gnu/libjava \
	-shared \
	-o libsampNat.so sampNat.o \
	-lstdc++ 
	#--main=sample

sample.o:  sample.class
	echo "making sample.o..."
	/root/testlibjava/gcc/bin/gcj \
	-c sample.class \
	-I/root/testlibjava/gcc/include \
	-I/root/testlibjava/gcc/libjava/include \
	-I/root/testlibjava/gcc/libjava \
	-I/root/testlibjava/gcc/libjava/gcj \
	-I/root/testlibjava/gcc/include/gcj \
	-I/root/testlibjava/compile/objdir/i686-pc-linux-gnu/libjava/include \
	-I/root/testlibjava/compile/objdir/i686-pc-linux-gnu/libjava
	#/root/testlibjava/gcc/bin/gcj -I/root/testlibjava/gcc/libjava/include -I/root/testlibjava/gcc/libjava -I/root/testlibjava/gcc/libjava/gcj -I/root/testlibjava/gcc/include/gcj -I/root/testlibjava/compile/objdir/i686-pc-linux-gnu/libjava/include -I/root/testlibjava/compile/objdir/i686-pc-linux-gnu/libjava -c sample.class

sample.class: sample.java
	echo "making sample.class..."
	/root/testlibjava/gcc/bin/gcj \
	--classpath=/root/testlibjava/gcc/share/libgcj.jar:. \
	-C sample.java

sample.h: sample.class
	echo "making sample.h..."
	/root/testlibjava/gcc/bin/gcjh \
	--classpath=/root/testlibjava/gcc/share/libgcj.jar:. \
	sample
	#/root/testlibjava/gcc/bin/g++ 

sampNat.o: sample.h sampNat.cc
	echo "making sampNat.o..."
	/root/testlibjava/gcc/bin/g++ \
	-I/root/testlibjava/gcc/include \
	-I/root/testlibjava/gcc/libjava/include \
	-I/root/testlibjava/gcc/libjava \
	-I/root/testlibjava/gcc/libjava/gcj \
	-I/root/testlibjava/gcc/include/gcj \
	-I/root/testlibjava/compile/objdir/i686-pc-linux-gnu/libjava/include \
	-I/root/testlibjava/compile/objdir/i686-pc-linux-gnu/libjava \
	-fno-rtti \
	-c sampNat.cc

clean:
	echo "cleaning..."
	rm -f sample sample.o sampNat.o sample.class sample.h
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