[U-Boot] [PATCH 1/2 v6] Make libgcc inclusion from common Makefile overridable by platform config file

[Dirk Behme <dirk.behme@googlemail.com>]

Mike Frysinger wrote:
> On Sunday 12 July 2009 14:29:46 Wolfgang Denk wrote:
>> Jean-Christophe PLAGNIOL-VILLARD wrote:
>>>> Right. And each of these is supposed to come with it's own version of
>>>> libgcc, configured exactly for  the  requirements  of  this  specific
>>>> version and configuration of GCC.
>>> the problem is that it's not really possible on arm
>>> because you will need a toolchain for u-boot and an other for the
>>> userland and in somecase an other for the kernel
>> You mean it is impossible to build a tool chain for ARM that can be
>> used to build U-Boot, Linux, and user space code?  I can't believe
>> that ARM support in GCC is that seriously broken.
> 
> basically, that is correct.  arm's libgcc is just that whacky because of all 
> the different ABIs that exist.  although citing the Linux kernel here may not 
> be appropriate because they specifically avoid libgcc -- because it's so 
> screwed up.
> 
> last i looked, some of the math functions in arm's libgcc depended on C 
> library functions (like raise() and abort()).  this is the kind of stuff Jean 
> is trying to avoid.

Yes, this is my understanding, too.

Conclusion seems to be that we can get this feature/functionality if 
it is configurable using the way Wolfgang proposed in

http://lists.denx.de/pipermail/u-boot/2009-July/056185.html

Best regards

Dirk