LINK : warning LNK4098: defaultlib "LIBC" conflicts with use of other libs; use /NODEFAULTLIB:librar

文章来源：http://blog.csdn.net/jiazhen/article/details/1679356

You are trying to link with incompatible libraries. Important   The run-time libraries now contain directives to prevent mixing different types. You’ll 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’ll get this warning.
You should compile all source files to use the same run-time library. 总之，一句话，lib之间有冲突。需要删除导入的一些libs。 

版　本	类　型	使用的library	被忽略的library
R  Release	单线程	libc.lib	libcmt.lib, msvcrt.lib, libcd.lib, libcmtd.lib, msvcrtd.lib
多线程	libcmt.lib	libc.lib, msvcrt.lib, libcd.lib, libcmtd.lib, msvcrtd.lib
使用DLL的多线程	msvcrt.lib	libc.lib, libcmt.lib, libcd.lib, libcmtd.lib, msvcrtd.lib
D   Debug	单线程	libcd.lib	libc.lib, libcmt.lib, msvcrt.lib, libcmtd.lib, msvcrtd.lib
多线程	libcmtd.lib	libc.lib, libcmt.lib, msvcrt.lib, libcmtd.lib, msvcrtd.lib
使用DLL的多线程	msvcrtd.lib	libc.lib, libcmt.lib, msvcrt.lib, libcd.lib, libcmtd.lib

例如编译Release版本的单线程的工程，在linker的命令行加入如下的参数： /NODEFAULTLIB:libcmt.lib /NODEFAULTLIB:msvcrt.lib /NODEFAULTLIB:libcd.lib /NODEFAULTLIB:libcmtd.lib /NODEFAULTLIB:msvcrtd.lib

当然，通过VC6.0的开发环境也可以配置。选择Project -> Setting，出现Project Setting对话框，单击Link标签，在Category下拉菜单中选择Input，在下方的Ignore libraries: 输入框中输入“被忽略的library”框中对应的libs。输入时注意当前Build是什么版本，libs之间用“，”隔开。“Ingore all default libraries”不能勾选。