STL include file guard names

[Gabriel Dos Reis]

Ed Rice-Senior Programmer PGS Software Perth <ed.rice@pgs.com> writes:

| Hi,
| 
| I noticed that the STL header file guard macro names in the version of
| libstc++ that ships with gcc 3.4.1 have changed compared to those that
| shipped with gcc 3.3.3.  For example in
| include/c++/3.4.1/bits/stl_set.h the header guard is
| 
| #ifndef _SET_H
| #define _SET_H 1
| 
| while with gcc 3.3.3 include/c++/3.3.3/bits/stl_set.h used header guards
| 
| #ifndef __GLIBCPP_INTERNAL_SET_H
| #define __GLIBCPP_INTERNAL_SET_H
| 
| Is there a reason for the change? It seems to me that the 3.3.3 style
| has the benefit of being much less likely to clash with other
| libraries.

Which others?  The name space _[A-Z].* is reserved to the
implementation. 

-- Gaby