GCJ (and IRC) questions.

[Troy Wu]

Hello, everyone.

I'm having some trouble with GCJ.  Is there an IRC channel where 
developers (and other knowledgable folks) hang out?  Also an IRC 
newbie....

			*	*	*

I'm a new user to GCJ.  I'm getting unusual compiler messages.  Let me try 
to break down my problem:

	The command:

gcj -g -fPIC --main=tacular.gui.Graphics `find . -name "*.o"` -L/usr/X11/lib64 -lX11

	The resultant error(s):

./cni/Globals.o(.gnu.linkonce.d.DW.ref.__gxx_personality_v0+0x0): In 
function `runtime_init()':
/raid/troy/tacular/cni/Globals.cc:24: undefined reference to 
`__gxx_personality_v0'
./cni/NativeGraphics.o(.text+0x11): In function 
`tacular::gui::NativeGraphics::NativeGraphics[not-in-charge]()':
/raid/troy/tacular/cni/NativeGraphics.cc:31: undefined reference to 
`tacular::gui::Graphics::Graphics[not-in-charge]()'
./cni/NativeGraphics.o(.text+0x1c):/raid/troy/tacular/cni/NativeGraphics.cc:31: 
undefined reference to `vtable for tacular::gui::NativeGraphics'
./cni/NativeGraphics.o(.text+0xad): In function 
`tacular::gui::NativeGraphics::NativeGraphics[in-charge]()':
/raid/troy/tacular/cni/NativeGraphics.cc:31: undefined reference to 
`tacular::gui::Graphics::Graphics[not-in-charge]()'
./cni/NativeGraphics.o(.text+0xb8):/raid/troy/tacular/cni/NativeGraphics.cc:31: 
undefined reference to `vtable for tacular::gui::NativeGraphics'
collect2: ld returned 1 exit status
make: *** [final] Error 1

-------------------------------------------------------------------------

It's enough to boggle the mind!

I don't know what the first thing is (the __gxx_personality_v0+0x0).  The 
second set of errors seems to say that the vtable for a class is busted.  
The third set of errors seems to say that vtable for the same class is 
busted.

What in the world are these 2 functions:

	tacular::gui::NativeGraphics::NativeGraphics[in-charge]()
	tacular::gui::NativeGraphics::NativeGraphics[not-in-charge]()

Are these ctors?  Is G++ doing something weird with Java ctors using GCJ?

Relevant info:

	* Using a dual-proc opteron machine running SuSE-9.2 (2.6.5)

	* Using GCJ 3.3.3

	* Graphics is an abstract class defined in Java, compiled with
	  GCJ.

	* NativeGraphics is a concrete class (extending Graphics) written
	  in C++, compiled with g++.

	* Executable is linked by gcj.

Can someone shed some light on this problem?

Thanks!

	--troy