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

[Scott Wood]

On Mon, Jul 13, 2009 at 05:25:35AM -0400, Mike Frysinger wrote:
> On Sunday 12 July 2009 14:29:46 Wolfgang Denk wrote:
> > 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.

Isn't that what multilib is for?

On a related note, I wish GCC had a "no-float" option that could be used
in place of soft-float.  It would be ABI-compatible with either soft or
hard float, because it doesn't use float at all (GCC would raise an error
if you try).

> 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.

It seems pretty reasonable for U-Boot to provide functions like
raise()/abort() that take the place of a hardware exception, and display
an error message.

-Scott