[patch darwin] updated patch fixes PR41296, PR41245 (also re-enable checking removed in PR41224, PR41237)

[IainS]

Hello,
further to

http://gcc.gnu.org/ml/gcc-patches/2009-09/msg00467.html

the attached patch resolves the residual issue with powerpc-apple- 
darwin8 (--with-dwarf2).

bootstrapped on powerpc-apple-darwin8 (stabs and dwarf2)
powerpc-apple-darwin9
i686-apple-darwin9.

object comparison is restored and functional in each case.

---
this is the simplest change - one file.
One could equally create a "darwin-compare-debug" and alter the  
config machinery to select that for darwin.

Iain

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