gcj/gdb in cross env

gcj/gdb in cross env

[FERANDELLE Pascal]

I build gcc/gcj 4.1.0 in cross env for target powerpc-linux, and did the same for gdb 6.4.

As I have a "Segmentation fault" with an HelloWorld program written
in Java, and compiled with powerpc-linux-gcj -g, I tried to launch
powerpc-linux-gdb on the exec file, but an error occurred :

Dwarf Error : wrong version in compilation unit header (is 99, should be 2) [in module HelloWorld]

What I did :

Host
    powerpc-linux-gcj -g -o HW HW.java --main=HW --static

Target
    gdbserver host:2345 HW

Host
    powerpc-linux-gdb HW
    -> Dwarf Error ...
    under gdb : target remote vmpc:2345
    but after, no debug is possible (no symbol table, no stack, etc)

When I built gdb 6.4 for target powerpc-linux, I have to configure it with --disable-werror, because without that, the build stopped due to several warnings of "value computed is not used".

Thanks for your help.

Pascal FERANDELLE

Re: gcj/gdb in cross env

[Daniel Jacobowitz]

On Wed, May 10, 2006 at 09:21:29AM +0200, FERANDELLE Pascal wrote:
> I build gcc/gcj 4.1.0 in cross env for target powerpc-linux, and did the same for gdb 6.4.
> 
> As I have a "Segmentation fault" with an HelloWorld program written
> in Java, and compiled with powerpc-linux-gcj -g, I tried to launch
> powerpc-linux-gdb on the exec file, but an error occurred :
> 
> Dwarf Error : wrong version in compilation unit header (is 99, should be 2) [in module HelloWorld]

I have not seen this.  Does readelf -wi complain about the file also?

-- 
Daniel Jacobowitz
CodeSourcery