Error LNK2005:exist already defined in msvcrt.lib(MSVCR100.dll)_LIBCMTD.lib 解决方案

来源：互联网发布：tinycore linux有啥用编辑：程序博客网时间：2024/05/17 03:54

Project -- Setting -- C/C++ -- C++ Language
Enable Run-Time Type Information(RTTI) 此项必须打勾！

http://www.cnblogs.com/chenkai/archive/2013/01/23/2873932.html

但现在Debug版编译ok，Release版编译报错：

Linking...
Creating library Release/DataBase.lib and object Release/DataBase.exp
CppSQLite3.obj : error LNK2001: unresolved external symbol "const type_info::`vftable'" (??_7type_info@@6B@)
DataBase.obj : error LNK2001: unresolved external symbol "const type_info::`vftable'" (??_7type_info@@6B@)
SQLite.obj : error LNK2001: unresolved external symbol "const type_info::`vftable'" (??_7type_info@@6B@)

......

解决方法：

Project -- Settings -- C/C++ -- Preprocessor -- Preprocessordefinitions:

Release：WIN32,NDEBUG,_WINDOWS,_WINDLL,_AFXDLL,_MBCS,_USRDLL //把NDEBUG 选项换成_DEBUG 然后Release就能够通过了
Debug： WIN32,_DEBUG,_WINDOWS,_WINDLL,_AFXDLL,_MBCS,_USRDLL

欺骗一下Release的编译器，哈哈。谁叫它不让编译通过。这叫“一山还有一山高”。