多obj 连接时遇到的错误 Linker Tools Warning LNK4098

在masm生成的asm.obj与vc++产生的vc.obj进行连接时 出现该错误 这是因为vc模块中与masm模块中包含的默认库不兼容造成的 由此产生该警告

windows的同一套API，有多线程版本，单线程版本之分...
在编译的时候可以设置用哪个库

如果没有设置，windows不知道到底该用哪个库，默认一个库使用，所以给个警告。

设置/NODEFAULTLIB:library 后，在链接的时候就不链接忽略的库，所以就没警告了

也可以使用

#pragma warning( disable : 4098 )来忽该警告

Error Message

defaultlib 'library' conflicts with use of other libs; use /NODEFAULTLIB:library

You are trying to link with incompatible libraries.

Note

The run-time libraries now contain directives to prevent mixing different types. You will receive this warning if you try to use different types or debug and non-debug versions of the run-time library in the same program. For example, if you compiled one file to use one kind of run-time library and another file to use another kind (for example, single-threaded versus multithreaded) and tried to link them, you will get this warning. You should compile all source files to use the same run-time library. See the Use Run-Time Library (/MD, /MT, /LD) compiler options for more information.

You can use the linker's /VERBOSE:LIB switch to determine which libraries the linker is searching. If you receive LNK4098 and want to create an executable file that uses, for example, the single-threaded, non-debug run-time libraries, use the /VERBOSE:LIB option to find out which libraries the linker is searching. The linker should print LIBC.lib and not LIBCMT.lib, MSVCRT.lib, LIBCD.lib, LIBCMTD.lib, or MSVCRTD.lib as the libraries searched. You can tell the linker to ignore the incorrect run-time libraries by using /NODEFAULTLIB for each library you want to ignore.

The table below shows which libraries should be ignored depending on which run-time library you want to use.

To use this run-time library	Ignore these libraries
Single-threaded (libc.lib)	libcmt.lib, msvcrt.lib, libcd.lib, libcmtd.lib, msvcrtd.lib
Multithreaded (libcmt.lib)	libc.lib, msvcrt.lib, libcd.lib, libcmtd.lib, msvcrtd.lib
Multithreaded using DLL (msvcrt.lib)	libc.lib, libcmt.lib, libcd.lib, libcmtd.lib, msvcrtd.lib
Debug Single-threaded (libcd.lib)	libc.lib, libcmt.lib, msvcrt.lib, libcmtd.lib, msvcrtd.lib
Debug Multithreaded (libcmtd.lib)	libc.lib, libcmt.lib, msvcrt.lib, libcd.lib, msvcrtd.lib
Debug Multithreaded using DLL (msvcrtd.lib)	libc.lib, libcmt.lib, msvcrt.lib, libcd.lib, libcmtd.lib

For example, if you received this warning and you want to create an executable file that uses the non-debug, single-threaded version of the run-time libraries, you could use the following options with the linker:

Copy

/NODEFAULTLIB:libcmt.lib /NODEFAULTLIB:msvcrt.lib /NODEFAULTLIB:libcd.lib /NODEFAULTLIB:libcmtd.lib /NODEFAULTLIB:msvcrtd.lib