native toolchain for freestanding apps

[Andrew Turner]

On Sun, 4 Mar 2012 00:40:06 -0800
Tim Kientzle <tim at kientzle.com> wrote:

> On Mar 3, 2012, at 7:23 PM, Tim Kientzle wrote:
> > On Mar 3, 2012, at 5:29 PM, Stanislav Sedov wrote:
> >> On Mar 3, 2012, at 11:03 AM, Tim Kientzle <tim at kientzle.com> wrote:
> >>> 
> >>> 2) Missing div/mod functions in ARM libgcc.
> >>> 
> >> 
> >> Hmm, maybe they are disabled because libc supplies them?
> > 
> > If I copy the various div/mod object files from libc.a into
> > libgcc.a, then u-boot compiles ...
> > 
> > Is there any compelling reason they can't be in both places?
Have you tried to build a FreeBSD binary when both lots of symbols are
provided? If it links properly then I can't think of any reason we
couldn't provide both. The compiler-rt versions are hidden so shouldn't
be exposed.

> Here's the patch for libcompiler_rt (aka libgcc.a) that just includes
> an extra copy of the numeric routines (duplicating the ones in libc).
> 
> With this, I'm now able to build u-boot (and other freestanding
> programs) using the FreeBSD xdev tools on ARM.
> 
> Any comments?
I have done the same with the ARM EABI support as compiler-rt provides
the required __aeabi_* symbols. This will mean with it's support the
libc versions are unneeded.

Andrew