[Boost-users] [interprocess] warning C4251: need dll-interface

Subject: [Boost-users] [interprocess] warning C4251: need dll-interface
From: Brent Arias (Brent.Arias_at_[hidden])
Date: 2009-04-08 18:28:13

I've defined a class to use within shared memory, and I've decorated it with a Windows _declspec(export) to expose it from a DLL.  When I compiled with VC 2008, I got this warning:

Warning C4251: class 'boost::interprocess::vector<T,A>' needs to have dll-interface to be used by clients of 'MyClass'

I searched boost user archives for any discussion of this, and in the context of boost.signals I've seen someone comment to simply disable the warning with:

#pragma warning (disable: 4251)
Std::list<OtherClass*> talkers;
#pragma warning (default: 4151)

Does this also apply to boost.interprocess?  Is it really safe to ignore this warning and continue to use the interprocess code from within a DLL?

Brent Arias