Bug 2421

There is a new warning by Intel C++ 9.1, which we checked with Intel, this also
seems to be with msvc, we should export templates instantiations, see below

Hi, Johnny

Please see the investigating notes from the developer.

The Microsoft compiler gives a similar warning with /W2 on a reduced example of
the program (ex.cpp). The documentation for this warning can be found at:
http://msdn2.microsoft.com/en-us/library/esew7y1w.aspx. And a helpful article is
here: http://www.unknownroad.com/rtfm/VisualStudio/warningC4251.html

> cl /W2 ex.cpp
Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 14.00.50727.26 for 80x8
Copyright (C) Microsoft Corporation. All rights reserved.

ex.cpp
ex.cpp(17) : warning C4251: 'ACE_Get_Opt::long_opts_' : class 'ACE_Array<T>' n
ds to have dll-interface to be used by clients of struct 'ACE_Get_Opt'
with
[
T=ACE_Get_Opt_Long_Option *
]
Microsoft (R) Incremental Linker Version 8.00.50727.26
Copyright (C) Microsoft Corporation. All rights reserved.

And they also added a possible fix for them which is inside the #if FIX in the
code attached.

Thanks,
Hao

// ex.cpp: test case for Q343687
template<class T>
struct ACE_Array_Base
{
ACE_Array_Base ();
};

template <class T>
class ACE_Array : public ACE_Array_Base<T>
{
};

typedef int ACE_Get_Opt_Long_Option;

#ifdef FIX
template class __declspec (dllexport) ACE_Array<ACE_Get_Opt_Long_Option*>;
#endif

struct __declspec (dllexport) ACE_Get_Opt
{
ACE_Array<ACE_Get_Opt_Long_Option*> long_opts_;
};