Re: Core dump (Illegal instruction) with crosstool's GCJ

[Martin Egholm Nielsen <martin at egholm-nielsen dot dk>]

Hi Dan,

> > Until recently I only had problems when I trying to compile any small 
> > Java-source with "-static". Applications linked like that wouldn't 
> > execute on the target and would cause a core dump immediately after 
> > start (signal 4, Illegal instruction).
> > However, now I've have a small test-example (dynamically linked) using 
> > the java.lang.reflect.Proxy-class, that'll fail consequently (Illegal 
> > instruction) performing some specific Java-action.
> > The crosscompiler has been build on cygwin with crosstool-0.28-rc13 
> > with the for the ppc405-target with gcc-3.4.0-glibc-2.2.5.dat.
> > A similar compiler has been created under my RedHat, and also a 
> > cygwin-compiler with glibc-2.3.2.
> > The target system runs the a root-filesystem from ELDK 2.0.2 (or maybe 
> > 2.2.0) from Denx Software, and the kernel is a patched 2.4.20 from 
> > DAVE (http://www.dave-tech.it/) specific for my PPChameleonEVB-board.
Now, I've tried using the root-filesystem from ELDK 3.0 which uses 
glibc-2.3.1 and gcc-3.2.2, and with my crosstool-cygwin-3.4.0-2.3.2 I 
_can_ now use static builds of _sample_ programs - not my faulty 
application (of course) (but this is still something I couldn't do before).
But I still cannot run a static application linked with 
crosstool-3.4.0-2.2.5.
That made me wonder: What are the requirements between compiler- and 
glibc-versions for crosstool-compiled applications and the 
target-system's system (both kernel and shell(?))?
Do I need to compile an entire root-filesystem with the exact same 
crosscompiler as my gcj-applications are compiled with?

I hope this makes any sense to you - I too am a bit confused :o)

Best regards,
 Martin



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