[Buildroot] External toolchain support improvements

[Markus Heidelberg]

hartleys, 03.11.2008:
> BTW, something is now broken with svn revision 23911 using an external
> toolchain.
> 
> I just did a "svn up; make menuconfig; make" and I get the following
> errors right when the build starts.
> 
> wget --passive-ftp -nd   -P /home/bigguiness/buildroot/dl
> "http://www.kernel.org/pub/"/linux/kernel/v2.6//linux-...tar.bz2
> --08:47:11--
> http://www.kernel.org/pub//linux/kernel/v2.6//linux-...tar.bz2
>            => `/home/bigguiness/buildroot/dl/linux-...tar.bz2'
> Resolving www.kernel.org... 204.152.191.5, 204.152.191.37
> Connecting to www.kernel.org|204.152.191.5|:80... connected.
> HTTP request sent, awaiting response... 404 Not Found
> 08:47:11 ERROR 404: Not Found.
> 
> make: *** [/home/bigguiness/buildroot/dl/linux-...tar.bz2] Error 1
> 
> 
> I can't figure out what .mk is trying to download "linux-...tar.bz2".
> Any ideas?

Some odd configuration?
grep WGET target/linux/Makefile.in*
Find out which one is used and backtrace the variable. Probably some kernel
version number variables are empty resulting in .. instead of 2.6.25

Markus