windows - Why do I get LNK4098 conflicts with use of other libs - when trying to compile C++ in MSVS2010 Express? -

my program not compile in /mt (multithreaded) mode. compiles in /md (multithreaded dll). want able use both libcurl , boost in application distribute installer.

compiling in: msvs2010

this code replicate problem:

#include "stdafx.h" #include "boost/regex.hpp" #include "curl/curl.h"  int _tmain(int argc, _tchar* argv[]) {     curl *curl;       curl = curl_easy_init();       return 0; } 

this warning if in /md mode:

link : warning lnk4098: defaultlib 'msvcrtd' conflicts use of other libs;  use /nodefaultlib:library 

if try compiling in /mt mode get:

1>msvcrtd.lib(msvcr100d.dll) : error lnk2005: _calloc defined in   libcmt.lib(calloc.obj) 1>msvcrtd.lib(msvcr100d.dll) : error lnk2005: _realloc defined in libcmt.lib(realloc.obj) 1>msvcrtd.lib(msvcr100d.dll) : error lnk2005: _free defined in libcmt.lib(free.obj) 1>msvcrtd.lib(msvcr100d.dll) : error lnk2005: _malloc defined in libcmt.lib(malloc.obj) 1>msvcrtd.lib(msvcr100d.dll) : error lnk2005: _strtoul defined in libcmt.lib(strtol.obj) 1>msvcrtd.lib(msvcr100d.dll) : error lnk2005: _memmove defined in libcmt.lib(memmove.obj) 1>msvcrtd.lib(msvcr100d.dll) : error lnk2005: _tolower defined in libcmt.lib(tolower.obj) 1>msvcrtd.lib(msvcr100d.dll) : error lnk2005: _strtol defined in libcmt.lib(strtol.obj) ... : fatal error lnk1169: 1 or more multiply defined symbols found 

i want compile in /mt mode others can run finished program out having msvs installed or needing download additional. can include , dll or lib files needed app in installer.

i disable loading 'msvcrtd' default library, compiling boost fails.

these preprocessor definitions:

win32 _debug _console building_libcurl http_only 

these additional dependencies:

libcurl.lib ws2_32.lib winmm.lib wldap32.lib 

does know doing wrong?

thanks, william

try setting nodefaultlib:libcmt.lib in linker options in vc.