[oe] unset MACHINE before building bintutils-cross

[Koen Kooi]

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Koen Kooi schreef:
> Hi,
> 
> There's a subtle bug in OE/binutils which will pickup $MACHINE from your shell environment
> and mess up binutils. In my case binutils thought is was built for 'arm:hx4700' instead of
> 'arm', making glibc-intermediate fail during configure.
> A big thanks to Holger for pointing me in the right direction.

The above is a bit confusing, to trigger the bug you need to do:

export MACHINE=hx4700 ; bitbake glibc

regards,

Koen
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