[uClinux-dev] user apps and SourceryG++

[Greg Ungerer]

Hi Harry,

Harry Gunnarsson wrote:
> Regarding the second question.
>  
> I believe David & Greg replied on this in a similar email thread 3 weeks 
> ago. I intended to give my 2 cents since I had some experience on this, 
> but I reply on this instead.
> I currently do compile both kernel and user-level applications using 
> CodeSourcery's latest for ColdFire, i.e. 4.2-47. It seems to work fine, 
> however there are a couple of things that you have to do to the 20070131 
> distro and the toolchain itself.
>  
> 1) For you vendor, edit vendor/<whatever>/<board>/config.arch and change 
> to this
>   CROSS_COMPILE=m68k-uclinux-
> 2) For your vendor, edit vendor/<whatever>/<board>/Makefile and change 
> all explicit references to m68k-elf-<objcopy, gcc etc> to 
> m68k-uclinux-<objcopy, gcc etc>
> 3)  Edit uClibc/libc/sysdeps/linux/m68k/clone.S, and remove the line 
> that says
>    .set clone,__clone
>   See the following patch
>  
> *** 80,85 ****
>    .weak clone
>    clone = __clone
>   #else
> -  .set clone,__clone
>   #endif
>  
> --- 80,84 ----
> 
> 4) Uncompress the latest CS toolchain and do
>     $ cd freescale-coldfire-4.2/lib/gcc/m68k-uclinux/4.2.1/include
>     $ ln -s ../include-fixed/limits.h limits.h
> 5) Obviously, append the freescale-coldfire-4.2/bin to your PATH variable
>  
> That's it! Now it compiles fine. Let me know how it goes.
>  
> Greg & David. You might want to consider the clone.S change above. And 
> possibly the makefile changes

The clone.S code like that is no longer in the newer version
of uClibc that will be in future dist release. The Makefiles
have been cleaned up so that they use $(CROSS_COMPILE)-
as the tool name prefix (unless I missed some :-)

Regards
Greg




> On 11/14/07, *David van Geest* <david at rhythmreloaded.com 
> <mailto:david at rhythmreloaded.com>> wrote:
> 
>     Hi all,
> 
>     I'm a bit new at embedded programming, so bear with me a bit.  I'm
>     running uClilnux on the Freescale M5275EVB, and I have a couple of
>     questions:
> 
>     1.  What are the options for including custom user software on the
>     board?  Is it necessary to re-compile the kernel with your app
>     included every time you make a change to your program(s)?
> 
>     2.  Has anyone used SourceryG++ (Personal Edition) to compile the
>     uCLinux kernel and/or their own applications?  Any tips on how that
>     can be accomplished?
> 
>     That's all for now.  Thanks for your help.
> 
>     -David
>     www.rhythmreloaded.com <http://www.rhythmreloaded.com/>
> 
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Greg Ungerer  --  Chief Software Dude       EMAIL:     gerg at snapgear.com
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