[Bug c++/44783] implement -ftemplate-backtrace-limit=

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44783

--- Comment #8 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-02-14 12:36:57 UTC ---
Created attachment 26658
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26658
Draft

This is a slightly tweaked and extended version of the patch which I actually
booted and tested.