Executing Gcj-SWT native code fails

Mon Jan 17 14:19:00 GMT 2005

Jakob Praher a Ã©crit :
>Am Montag, den 17.01.2005, 14:31 +0100 schrieb krimo:
>>>>Jakob Praher a Ã©crit :
>>>>>>>>>Am Montag, den 17.01.2005, 13:08 +0100 schrieb krimo:
>>>>>>>>>>>>>>>>Hi guys,
>>>>>>>>>>>>>>>>>I'm using librairies included in the swingwt debian package and I 
>>suppose that the -fjni flag is set.
>>I also tried to compile swingwt 0.85 myself (I verified the Makefile and 
>>the -fjni flag is set) to get
>>libswt compiled with -fjni. Unfortunately, libswt is linked with 
>>libswt-mozilla-gtk-3063.so that contains unresolved symbols:
>>/tmp/SwingWT/lib/linux_gtk2/libswt-mozilla-gtk-3063.so: undefined 
>>reference to `nsCString::nsCString[in-charge]()'
>>/tmp/SwingWT/lib/linux_gtk2/libswt-mozilla-gtk-3063.so: undefined 
>>reference to `vtable for nsQueryInterface'
>>/tmp/SwingWT/lib/linux_gtk2/libswt-mozilla-gtk-3063.so: undefined 
>>reference to `nsCString::nsCString[in-charge](char const*, int)'
>>/tmp/SwingWT/lib/linux_gtk2/libswt-mozilla-gtk-3063.so: undefined 
>>reference to `nsString::nsString[in-charge](unsigned short const*)'
>>/tmp/SwingWT/lib/linux_gtk2/libswt-mozilla-gtk-3063.so: undefined 
>>reference to `nsString::AssignWithConversion(char const*)'
>>/tmp/SwingWT/lib/linux_gtk2/libswt-mozilla-gtk-3063.so: undefined 
>>reference to `nsString::nsString[in-charge]()'
>>I didn't set the LD_LIBRARY_PATH. At All, I don't have any errors or 
>>warnings
>>>>>>you need to have libxpcom.so on your library search path or in
>LD_LIBRARY_PATH
>I've mine in /usr/lib/libxpcom.so which is provided by mozilla-browser.
>firefox includes it in /usr/lib/mozilla-firefox/libxpcom.so, that might
>be a reason why the system doesn't find the shared object.
>>>>>Here is an example of the execution with a System.out.println("Hello"); 
>>added just after shell.open();:
>>>>hostname:/home/me/projects/GUISWT# ./Test
>>Hello
>>>>and that's all... I got no errors or warnings at the compilation or 
>>execution steps, that's why I really don't understand...
>>>>I'm using:
>>gcj both 3.4 & 3.3
>>libgcj4 required by libswt.so
>>>>>>>that's pretty strange
>ltrace could give you some interesting insights. do you have recent gtk
>libs on your system (but I think thats fixed when you install the debian
>packages)
>>>Yes, my debian is up to date. I try using libgcj5 and I get now a null 
pointer exception:
Exception in thread "main" java.lang.NullPointerException
 at java.lang.Class.initializeClass() (/usr/lib/libgcj.so.5.0.0)
 at java.lang.Class.initializeClass() (/usr/lib/libgcj.so.5.0.0)
 at _Jv_AllocObjectNoFinalizer (/usr/lib/libgcj.so.5.0.0)
 at Test.main(java.lang.String[]) (Unknown Source)
Very strange, for a simple example...