[Bug bootstrap/46810] [4.6 regression] sparc64-linux bootstrap fails with "C++ preprocessor "/lib/cpp" fails sanity check"

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46810

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> 2010-12-06 
11:59:26 UTC ---
would that also address PR 40950 ?