Re: can't resolve symbol '_Unwind_Backtrace'

ffileppo wrote:
>> ffileppo wrote:
>>> Hi,
>>>
>>> I'm getting this error when I try to run a gcj exe on my target (arm-linux, cpu PXA270):
>>>
>>> ./a.out: can't resolve symbol '_Unwind_Backtrace'
>> Hmm, doesn't look like armel.
>>
>> Which ABI is this?  New or old ARM ABI?  What version of gcc?
>>
>> The me what `uname -a' returns.
>>
>> Andrew.
>>
> 
> How can I check which ABI I'm using?
> 
> I used GCC 4.3 to compile arm-linux-gcj; the rootfs of the target was built using gcc 4.2.3 (with uclibc), I don't know it is important though.
> 
> You mean "uname -a" of my target right?
> It tells:
> Linux uclibc 2.6.22.6 #72 Mon Apr 21 15:34:00 CEST 2008 armv5tel unknown

OK, that's the new ABI: the "el" on the end of the name tells us that.

I'm wondering if maybe you have an old version of libgcc on the
target and a new version in the x-compiler.  Run your program in
gdb and then do "info share".  It'll tell you which libgcc you're 
using.

Your newly built libgcc_s.so will be somewhere like

x-arm/install/arm-linux/lib/libgcc_s.so

and this is the one you want in your LD_LIBRARY_PATH on your target.
Copy everything in x-arm/install/arm-linux/lib to your target.

zorro:~ $ nm x-arm/install/arm-linux/lib/libgcc_s.so | grep Backtrace
000075c0 T _Unwind_Backtrace

Andrew.