CMake - "lib" prefix bug in implibs of MSVC about config

[Kojoley]

Could you please check that CMake adds -DBOOST_DYN_LINK? I couldn't find BOOST_DYN_LINK anywhere in CMake, which means it is a CMake bug. From my understanding it should've add it when you do set(Boost_USE_STATIC_LIBS OFF).

[jppgmx]

I did the test adding:

#ifndef BOOST_DYN_LINK
    #error "Preprocessor not defined"
#endif

Regardless of whether you add Boost::disable_autolinking or not, the macro is not defined.

[Kojoley]

Meh, you would not be able to test BOOST_DYN_LINK from the user code, it is being undefined here

config/include/boost/config/auto_link.hpp

Lines 520 to 522 in a1cf5d5

	#if defined(BOOST_DYN_LINK)
	# undef BOOST_DYN_LINK
	#endif

BOOST_DYN_LINK seems to be an 'internal' macro that a library which uses auto_link.hpp configures, the user controlled macros are: BOOST_ALL_DYN_LINK and BOOST_<WHATEVER>_DYN_LINK (BOOST_THREAD_DYN_LINK in your case). It means that set(Boost_USE_STATIC_LIBS OFF) should either make CMake add BOOST_ALL_DYN_LINK on everything or target_link_libraries(ProjName PUBLIC Boost::thread) should add BOOST_THREAD_DYN_LINK.

There are related tickets on CMake bug tracker:
https://gitlab.kitware.com/cmake/cmake/-/issues/16484
https://gitlab.kitware.com/cmake/cmake/-/issues/17241
https://gitlab.kitware.com/cmake/cmake/-/issues/16699