学习英语吧,迫切的需要每天都学习英语,主要是阅读能力,否则没办法深造计算机方向了,主要瓶颈啊:
参考MSDN的官方网站的解释:http://msdn.microsoft.com/en-us/library/aa267384%28VS.60%29.aspx点击连接
Linker Tools Warning LNK4098
defaultlib "library " conflicts with use of other libs; use /NODEFAULTLIB:library
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. See the Use Run-Time Library (MD, /ML, /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 the incorrect run-time libraries by typing the incorrect libraries in the Ignore Libraries text box on the Link tab of the Settings dialog box in Developer’s Studio or by using the /NODEFAULTLIB:library option with LINK for each library you want to ignore. See the Ignore Libraries (/NODEFAULTLIB) linker option for more information.
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:
/NODEFAULTLIB:libcmt.lib /NODEFAULTLIB:msvcrt.lib /NODEFAULTLIB:libcd.lib /NODEFAULTLIB:libcmtd.lib /NODEFAULTLIB:msvcrtd.lib
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MSDN上的解释为: 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 |
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 |
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。
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忽略它。
LIBCMT.lib是你的工程中设定了多线程、静态连接的编译选项而出现的。系统却省的库为单线程、静态连接。所以,在连接的时候会出现此警告。
同样,如果采用多线程、动态连接,则会出现MSVCRT的警告。
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