Re: [Xenomai-help] Error compiling Xenomai 2.4.8 with I-pipe tracer

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

Berruer Sébastien wrote:
> Hello,
> 
> I'm using Linux 2.6.28 and Xenomai 2.4.8 over an PXA255 processor based
> board.
> 
> I can't achieve the compilation process when I enable the I-pipe tracer.
> I've tried some mixed configurations but it always fails with an error.
> I use :
> 
>  - gcc version 4.2.3 (Sourcery G++ Lite 2008q1-126)
>  - GNU C Library stable release version 2.5, by Roland McGrath et al.
> 
> I join the .config file of the basic configuration I'd like to have
> (trying to keep no frequency scaling, no power saving mode, replace the
> standard serial driver by the RT one, no FPU support...) and a copy of
> the compile process' trace.
> 
> I hope you'd be able to help me pointing out the error.

It is a known toolchain issue, you are using a toolchain too recent for
this kernel version. This is a mainline bug, there is a fix, but I do
not know if it has been merged yet. Though according to the fix, this
gnu_mcount stuff comes with gcc 4.4, so I am not sure you use the
compiler you think you are using.

So, either downgrade your toolchain (I bet 2007q3 works, since it is the
one I have been using for a long time), when you want to use the tracer.
Or apply the patches which have been published on the linux-arm-kernel
mailing list.

-- 
                                          Gilles