BUG: _DLL used to define BOOST_SIGNALS_STATIC_LINK

From: kaineumann2001 (kaineumann2001_at_[hidden])
Date: 2003-08-11 19:53:02

Under cl(MS)/icl(Intel) compiler hash-def '_DLL' denotes dynamic 
linking of the C runtime library.  Therefore, signals library should 
not use this to determine linkage (I may wish to statically link the 
signals library, while dynamically linking c-runtime.)

see file boost/signals/detail/signals_common.hpp where the following 
snippet is invalid:

#if defined(_MSC_VER) && defined(_DLL)
#  define BOOST_SIGNALS_HAS_DLL_RUNTIME
#endif

#if defined(BOOST_SIGNALS_HAS_DLL_RUNTIME) && !defined
(BOOST_SIGNALS_STATIC_LINK)
#   if defined(BOOST_SIGNALS_IN_LIBRARY_SOURCE)
#       define BOOST_SIGNALS_DECL __declspec(dllexport)
#       define BOOST_SIGNALS_BUILD_DLL
#   else
#       define BOOST_SIGNALS_DECL __declspec(dllimport)
#  endif
#endif

here BOOST_SIGNALS_DECL is defined as __declspec(dllimport) as a 
consequence of linking the c-runtime dynamically under cl/icl 
compilers.  But that's not what I wanted - I wanted to link 
signals.lib statically.

This same bug is in the regex library.  In fact, anyone able to fix 
this, should search for _DLL in the BOOST headers.

Cheers,
Kai