Crosstool-ng always starts from the top

[Stuart Longland <redhatter at gentoo dot org>]

Hi all,
	Is there a way to convince crosstool-ng to pick up where it left off? 
I've got a situation where some misconfigured options caused crosstool 
to fail to build gcc (arm-cortex-eabi target; GCC was to be configured 
using --with-cpu=cortex-m3 -- this fails because the "CPU does not 
support ARM mode").

	The upshot is that I have to run `ct-ng menuconfig` again, and tweak 
the options for gcc and run it again.  This is fine, but when I run 
`ct-ng build`, it starts right from scratch again building GMP, MPFR, 
PPL, Cloog and binutils... which all should be identical to before, and 
shouldn't need rebuilding.

	Is there a reason why the builder can't just assume (or be convinced to 
assume) those components are already built and resume at the last 
component where the failure occurred?

Regards,
--
Stuart Longland (aka Redhatter, VK4MSL)      .'''.
Gentoo Linux/MIPS Cobalt and Docs Developer  '.'` :
. . . . . . . . . . . . . . . . . . . . . .   .'.'
http://dev.gentoo.org/~redhatter             :.'

I haven't lost my mind...
  ...it's backed up on a tape somewhere.

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