Re: Re: Really cross compiling gdb.

Re: Re: Really cross compiling gdb.

[James Steward]

Hi Simon,

> Simon Richter <Simon.Richter@picotux.com> wrote:
> 
> Hello,
> 
> James Steward wrote:
> 
> > This development board has heaps of RAM and CF disk space so I 
> > thought about compiling gdb to run on the development platform but 
> > alas with the --host=arm-xscale-linux-gnu and 
> > --target=arm-xscale-linux-gnu and the readline workaround the gdb
> > application is still a i386 executable (the build machine).
> 
> Setting both host and target should usually work, however IIRC there are 
> 
> a few broken configure scripts out there that set build=host if only 
> host is given, later on determine that build==host, so it's obviously a 
> native build and no cross compiler prefix is needed, so the host gcc is 
> used.
> 
> Setting "--build=`./config.guess`" or something similar worked for us, 
> at least. :-)
> 
>     Simon

Thanks for the tip - but it doesn't seem to have worked for me :-(

My configure command now looks like this.

../configure  --prefix=/usr/local/arm-linux/gcc-3.4.4-glibc-2.3.5/arm-xscale-linux-gnu/ --program-prefix=arm-xscale-linux-gnu- --build=`../config.guess` --target=arm-xscale-linux-gnu --host=arm-xscale-linux-gnu

Still the i386 gcc is used rather than the cross arm-xscale-linux-gnu-gcc, and of course file gdb/gdb says ;
gdb/gdb: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.2.0, dynamically linked (uses shared libs), not stripped
When I was hoping for an ARM executable.

I configured and compiled in a fresh subdir so as not to have any old files laying around from previous attemps.

Is it worth noting that the sources are from Debians stable sources..
gdb_6.3.orig.tar.gz
gdb_6.3-6.diff.gz

Maybe do I need to set CC=arm-xscale-linux-gnu-gcc or something?  I think I tried that yesterday and it wasn't helping - but maybe with the --build set as well?

I appreciate your thoughts.

Regards,
James.

Re: Re: Really cross compiling gdb.

[Jim Blandy]

On 1/11/06, James Steward <jamessteward@optusnet.com.au> wrote:
> Thanks for the tip - but it doesn't seem to have worked for me :-(

I'm not too familiar with this sort of cross-building, but I believe
that ought to work.  I think you're going to have to grovel through
the configure scripts and figure out what's going wrong.

RE: Re: Really cross compiling gdb.

[Dave Korn]

Jim Blandy wrote:
> On 1/11/06, James Steward <jamessteward@optusnet.com.au> wrote:
>> Thanks for the tip - but it doesn't seem to have worked for me :-(
> 
> I'm not too familiar with this sort of cross-building, but I believe
> that ought to work.  I think you're going to have to grovel through
> the configure scripts and figure out what's going wrong.

  I have an idea!

James Steward wrote:

> My configure command now looks like this.
> 
> ../configure 
> --prefix=/usr/local/arm-linux/gcc-3.4.4-glibc-2.3.5/arm-xscale-linux-gnu/
> --program-prefix=arm-xscale-linux-gnu- --build=`../config.guess`
> --target=arm-xscale-linux-gnu --host=arm-xscale-linux-gnu   


  Perhaps this is a manifestation of the
can't-find-cross-tools-when-configuring-with-a-relative-path bug, and perhaps
using an absolute path to the configure script will sort it out?

  (Or perhaps not; this is a bit of a WAG :-P)

    cheers,
      DaveK
-- 
Can't think of a witty .sigline today....

Re: Re: Really cross compiling gdb.

[Daniel Jacobowitz]

On Thu, Jan 12, 2006 at 09:00:15AM +1100, James Steward wrote:
> ../configure  --prefix=/usr/local/arm-linux/gcc-3.4.4-glibc-2.3.5/arm-xscale-linux-gnu/ --program-prefix=arm-xscale-linux-gnu- --build=`../config.guess` --target=arm-xscale-linux-gnu --host=arm-xscale-linux-gnu
> 
> Still the i386 gcc is used rather than the cross arm-xscale-linux-gnu-gcc, and of course file gdb/gdb says ;
> gdb/gdb: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.2.0, dynamically linked (uses shared libs), not stripped
> When I was hoping for an ARM executable.

What does the output of configure look like?

-- 
Daniel Jacobowitz
CodeSourcery