[boost] Re: [thread] Why is there a restriction for the runtime libraries?

From: Stefan Slapeta (stefan_at_[hidden])
Date: 2004-12-06 07:48:08

Roland Schwarz wrote:
> [many things...]

There are two problems: one is in the jamfile, the other is in boost 
configuration. Both together make it impossible to configure 
boost.thread for a dynamic rt!

a)

thread/build/jamfile: remove the requirements for the runtime.

b)

thread/detail/config.hpp:

#       if defined(BOOST_MSVC) || defined(BOOST_INTEL_WIN)
             //For VC++, choose according to threading library setting
#           if defined(_DLL)
                 //Threading library is dll: use Boost.Threads dll
#               define BOOST_THREAD_USE_DLL
#               define BOOST_THREAD_DECL __declspec(dllimport)
#               define BOOST_DYN_LINK
#           else
                 //Threading library is lib: used Boost.Threads lib
#               define BOOST_THREAD_USE_LIB
#               define BOOST_THREAD_DECL
#           endif
#       else

IMO this sequence is wrong (look at the comments!) because the _DLL 
macro _DOESN'T_ say that a dll is built!!!! It rather says that a shared 
runtime is used (I don't know if this was the intention behind this 
sequence, the comment is wrong anyway).
The code as is means that every static rt configuration is linked to a 
static boost.thread lib and every dynamic rt configuration is linked to 
boost.thread as dll. I just don't know if there is any rationale behind 
automatically selecting these combinations.

Stefan