can't resolve symbol '_Unwind_Backtrace'

[David Daney]

Andrew Haley wrote:
> David Daney wrote:
>> Andrew Haley wrote:
>>> 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
> 
>> Are you really using uClibc?
>>
>> Has libgcj ever been tested with other than glibc?
>>
>> I know uClibc does not work with libgcj on MIPS.
> 
> OMG, does this system not use glibc?  I didn't know that.
> I would be very surprised to see this work.
> 

I did get libgcj-3.4 working with uClibc several years ago.  It is not a 
major patch, but It did require hacking up both uClibc and GCC to get 
the exception handling working.  I gave up on it as the aggravation of 
using UClibc was not worth the small space savings.

David Daney