id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
4902	strange auto_link behaviour with --layout=system & defined BOOST_AUTO_LINK_NOMANGLE under vc9.0	kopylov@…	Beman Dawes	"Env: Visual Studio 9.0.30729.1 SP
Boost built with --layout=system

in user code:

{{{
#define BOOST_AUTO_LINK_NOMANGLE 1
#define BOOST_LIB_DIAGNOSTIC
#include <boost/filesystem.hpp>
}}}

in auto_link.hpp I made a little change in pragma message to clarify what happens:

{{{
#ifdef BOOST_AUTO_LINK_TAGGED
#  pragma commentcomment(lib, BOOST_LIB_PREFIX BOOST_STRINGIZE(BOOST_LIB_NAME) BOOST_LIB_THREAD_OPT BOOST_LIB_RT_OPT "".lib"")
#  ifdef BOOST_LIB_DIAGNOSTIC
#     pragma message (""Linking to lib file(1): "" BOOST_LIB_PREFIX BOOST_STRINGIZE(BOOST_LIB_NAME) ""-"" BOOST_LIB_TOOLSET BOOST_LIB_THREAD_OPT BOOST_LIB_RT_OPT ""-"" BOOST_LIB_VERSION "".lib"")
#  endif
#elif defined(BOOST_AUTO_LINK_NOMANGLE)
#  pragma comment(lib, BOOST_STRINGIZE(BOOST_LIB_NAME) "".lib"")
#  ifdef BOOST_LIB_DIAGNOSTIC
#     pragma message (""Linking to lib file(2): "" BOOST_STRINGIZE(BOOST_LIB_NAME) "".lib"")
#  endif
#else
#  pragma comment(lib, BOOST_LIB_PREFIX BOOST_STRINGIZE(BOOST_LIB_NAME) ""-"" BOOST_LIB_TOOLSET BOOST_LIB_THREAD_OPT BOOST_LIB_RT_OPT ""-"" BOOST_LIB_VERSION "".lib"")
#  ifdef BOOST_LIB_DIAGNOSTIC
#     pragma message (""Linking to lib file(3): "" BOOST_LIB_PREFIX BOOST_STRINGIZE(BOOST_LIB_NAME) ""-"" BOOST_LIB_TOOLSET BOOST_LIB_THREAD_OPT BOOST_LIB_RT_OPT ""-"" BOOST_LIB_VERSION "".lib"")
#  endif
#endif
}}}

then I get the compiler output:

{{{
1>Linking to lib file(2): boost_filesystem.lib
1>Linking to lib file(3): libboost_system-vc90-mt-gd-1_44.lib
}}}

Looks like the ""else"" preprocessor section is executed."	Bugs	closed	To Be Determined	filesystem	Boost 1.44.0	Problem	fixed