id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
532	multi_index/detail/unbounded.hpp causes problems in MSVC PCH	dsmtoday	joaquintides	"{{{
MSVC 7.1

I integrated a multi_index into my project and have
been very happy with it.  However, compile times for my
class went from milliseconds to five seconds.  And
since this class is a cornerstone of my project, this
time got added to each compile.

To try and speed things up, I put this particular
class's header file in my precompiled header system. 
Well, that worked great, everything compiles fast, but
when it links, there are two static objects defined in
every object file, causing conflicts, so it doesn't
link.  The errors are the same this guy got.  
http://lists.boost.org/boost-users/2004/07/7151.php

What I tried and what works for me, but I'm not sure is
an acceptable long-term solution, was to #define out
two lines which to my eyes appear to define static
objects.  Why this is only a problem for pre-compiled
headers, I don't know.  Anyway, here is what I did to
unbounded.hpp

#if !defined(_MSC_VER)
namespace{

detail::unbounded_type 
unbounded_obj=detail::unbounded_type();
detail::unbounded_type& unbounded=unbounded_obj;

} /* unnamed */
#endif


}}}"	Bugs	closed		multi_index	None		None