Re: [PATCH] Add basic m68k support to crosstool-ng

["Yann E. MORIN" <yann dot morin dot 1998 at anciens dot enib dot fr>]

Hello Remy, All!

On Sunday 07 February 2010 22:17:13 Remy Bohmer wrote:
> > From the gcc man page, it seems you can also pass -march and -mtune.
> > Did you exclude those on purpose, or is it a oversight?
> Looking deeper into this it seems that:
> * if GCC is compiled with --with-arch=m68k (ARCH_ARCH=m68k) then the
> build of newlib eventually fails because its compilation passes
> -march=m68k to GCC, which is an illegal value for GCC itself.
> * If GCC is compiled with 'ARCH_ARCH=cpu32', which is valid for -march
> for GCC as listed on the man-pages, then the compilation of GCC fails
> since it does not like this option to be passed through --with-arch.
> * --with-tune is not supported either, although --with-cpu works properly.

Hmmm. Lemme see...

OK, gcc is clearly at fault here (IMHO). So it's the responsibility of the
gcc build script to fix those.

Eg.:
- CT_ARCH_ARCH can take any value acceptable by -march
- the build script mangles that value to build a value suitable for
  --with-arch

That's the idea... But I'm no m68k expert, here...

Regards,
Yann E. MORIN.

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