[Bug libquadmath/55473] quadmath.h should have extern "C" for C++ users

[skannan at redhat dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55473



--- Comment #1 from Shakthi Kannan <skannan at redhat dot com> 2013-03-06 
08:53:19 UTC ---

Created attachment 29593

  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29593

Added cplusplus macro usage