Re: can't resolve symbol '_Unwind_Backtrace'

[David Daney <ddaney at avtrex dot com>]

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