Re: Building a native toolchain for a target

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

Hello Hichem!
Hello all!

On Wednesday 06 May 2009 17:09:32 Hichem Boussetta wrote:
> I need to compile a native toolchain to run on a target. Is it possible
> to do that using crosstool-ng ?

No, not yet. I do not have an immediate need for this, and no one
stepped in to add such support, so that is not supported.

BTW, in crosstool-NG, I call that a cross-native toolchain, That
is, a toolchain that is cross-compiled, hence "cross", but will
run on the target, hence "native".

If you feel brave, here are a few tips:
- when building a cross-native toolchain, we need a cross-compiler
  that runs on host, and compiles for target
- we do not need either of the core gcc pass 1 or 2, as we already
  have the afore-mentioned cross-compiler that is able to build
  the C library
- the final compiler that we build must *not* be in the PATH, as it
  will not run on host (because it is expected to run on target)

There should be almost everything needed already in place in
crosstool-NG, but that has not been tested at all.

Here are a few places to look at (in svn trunk):
- config/toolchain.in          lines  94..139
- scripts/crosstool-NG.sh.in   lines 301..310
- scripts/build/cc/gcc.sh      lines  47.. 78

There might be some other places, but I leave them for you to find. ;-)

If you (or anyone else) volunteer, do not hesitate to ask, if you
encounter problems...

Regards,
Yann E. MORIN.

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