Re: [Libunwind-devel] ARM building

[Stéphane Régnier]

Ok, was my fault, my --host attribute was wrong, I tried arm, armv4 and
armv4t (accepted -march options of gcc) but it seems to need the result
of gcc -dumpmachine (arm-none-linux-gnueabi in my case).

Thanks for the help.

I've also found an upper level library doing what I want,
google-breakpad. It has its own unwinder (which work not so bad) but it
seems possible to use libunwind instead, I'll take a look on that. But
libunwind usage is flagged "still in development", does anybody have
already tried to do it ?

Le Wednesday 02 November 2011 à 14:29 +0100, Ken Werner a écrit :
> On 10/31/2011 03:29 PM, StéphaneRégnier wrote:
> > Hi,
> >
> > I'm trying to compile libunwind for armv4/linux to see if it fill my needs. 
> > I
> > have an issue concerning a missing symbol : _Uarm_get_elf_image (when 
> > linking
> > tests and own prog). Both in last release and git master branch, that 
> > function
> > seems to be defined in src/os-linux.c but I see no object file containing 
> > this
> > symbol (scanned with nm).
> >
> > Is arm compilation broken or I'm missing something ? I'm compiling on a x86 
> > host
> > with arm-gcc 4.4.1.
> >
> > Thx
> 
> Hi Stéphane,
> 
> Could you post some details on how you're cross-building libunwind? 
> Usually I'm building it natively so I haven't much experiences with 
> doing it cross. However, the following seems to work on a X86 Ubuntu system:
> 
> sudo apt-get install git gawk make automake libtool texlive-extra-utils 
> gcc-arm-linux-gnueabi
> git clone git://git.sv.gnu.org/libunwind.git libunwind
> cd libunwind
> autoreconf -i
> ./configure --host=arm-linux-gnueabi CFLAGS="-U_FORTIFY_SOURCE"
> make -j`getconf _NPROCESSORS_ONLN`
> 
> $ arm-linux-gnueabi-nm -D src/.libs/libunwind*.so.8.0.0 | grep get_elf_image
> 00001c08 T _Uarm_get_elf_image
> 00001ca0 T _Uarm_get_elf_image
> 
> Regards
> Ken