[Bug c++/51486] g++ doesn't implicitly search for header in system include path include/c++//decimal/

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51486

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-12-09 
16:31:44 UTC ---
I assume the reasoning is similar to how we require users to include
<tr1/memory> to get TR1's <memory>