[Bug libstdc++/47145] [4.6 Regression] cross-compilation fails with "cannot check for file existence when cross compiling"

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47145

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-01-03 
18:04:04 UTC ---
There's a suggestion at http://gcc.gnu.org/ml/libstdc++/2011-01/msg00001.html
to use a URL and let the catalog resolve that to a local file, which would mean
no need to test for the file (I'm not sure how to test for the feature in that
case though)