Using this implementation for placement new:
http://nvwa.cvs.sourceforge.net/viewvc/nvwa/nvwa/debug_new.h?view=markup

Would allow for placement new to be overridden without a compiler warning (with debug info). It feels a bit awkward though.

It might be interesting to keep it as an option.

A longer discussion related to this can be found here:
https://groups.google.com/forum/?fromgroups=#!topic/cpputest/afbEk_2ey2Q