[oe] 'LIBC' variable clashes with perl variable

[Phil Blundell]

On Sun, 2010-07-11 at 15:45 +0200, Koen Kooi wrote:
> Perl (among others) uses the 'LIBC' variable to point its linker to
> libc.so.6, which fails due to OE redefing LIBC.
> 
> Any objections to renaming LIBC to TARGET_LIBC in OE?

How is perl getting to see that variable?  I don't think it ought to be
exported.

I don't have any problem with renaming it, though I do wonder whether it
would be better to just abolish it altogether in favour of inspecting
${HOST_OS}.

p.