在编译中遇到 defaultlib "MSVCRT" conflicts with use of other libs 怎么解决？？急！！！

2004-05-02 11:16:50 2.3k 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

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我的程序使用到了 postgresql 数据库的C接口函数，如果使用动态库libpq.dll程序编译没有任何问题，但是如果使用静态的libpq.lib，在编译中会出现以下错误
程序中MFC使用的也是静态连接。

Linking...
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _sprintf already defined in libcmtd.lib(sprintf.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _malloc already defined in libcmtd.lib(dbgheap.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _free already defined in libcmtd.lib(dbgheap.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _strncpy already defined in libcmtd.lib(strncpy.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: __snprintf already defined in libcmtd.lib(snprintf.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _realloc already defined in libcmtd.lib(dbgheap.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _tolower already defined in libcmtd.lib(tolower.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: __isctype already defined in libcmtd.lib(isctype.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _strspn already defined in libcmtd.lib(strspn.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _strncmp already defined in libcmtd.lib(strncmp.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: __errno already defined in libcmtd.lib(dosmap.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _strtoul already defined in libcmtd.lib(strtol.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _getenv already defined in libcmtd.lib(getenv.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _atoi already defined in libcmtd.lib(atox.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _memmove already defined in libcmtd.lib(memmove.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _fclose already defined in libcmtd.lib(fclose.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _fgets already defined in libcmtd.lib(fgets.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _fopen already defined in libcmtd.lib(fopen.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _fflush already defined in libcmtd.lib(fflush.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: __vsnprintf already defined in libcmtd.lib(vsnprint.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _exit already defined in libcmtd.lib(crt0dat.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: __strdup already defined in libcmtd.lib(strdup.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: __stricmp already defined in libcmtd.lib(stricmp.obj)
LINK : warning LNK4098: defaultlib "MSVCRT" conflicts with use of other libs; use /NODEFAULTLIB:library
Debug/dataman.exe : fatal error LNK1169: one or more multiply defined symbols found

用于是刚接触VC，请各位能帮帮小弟，谢了！！！急！！！！

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hopen 2004-06-18

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错了，错了，怎么把握自己的lib写进去了，应该是：

因为MSVCRT.lib(MSVCRT.dll)是Dll不能Ignore 它，应该Ignore的是libcmtd.lib
在Project->settings->Link中Category中选择“input"选项
在Ignore libraries 中将与MSVCRT.lib 冲突的libcmtd.lib
写入就行了或者像aspvbjava(最近比较郁闷)所说的project-->setting-->link-->project options里面，不是加入/NODEFAULTLIB:MSVCRT.lib 而是加入/NODEFAULTLIB:libcmtd.lib

hopen 2004-06-18

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我今天也遇到了类型的问题。Ignore all default libraries然后手动添加是一种办法但是比较繁琐。
因为MSVCRT.lib(MSVCRT.dll)是Dll不能Ignore 它，应该Ignore的是libcmtd.lib
在Project->settings->Link中Category中选择“input"选项
在Ignore libraries 中将LIBCD.lib冲突的lib写入就行了libcmtd.lib

或者像aspvbjava(最近比较郁闷)所说的project-->setting-->link-->project options里面，不是加入/NODEFAULTLIB:MSVCRT.lib 而是加入/NODEFAULTLIB:libcmtd.lib

robert9999 2004-06-16

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我也遇到类似问题，不知道什么原因！

hummerking 2004-05-08

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如果 Ignore all default libraries ，应该手动添加那些库呢？？？不好意思，刚接触VC搞不大清楚。

PiggyXP 2004-05-07

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啊，Ignore all default libraries然后手动添加不成末？
那不知道了，关注，友情up一下

hummerking 2004-05-04

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自己在up一下

runall 2004-05-04

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帮你up一下

aspvbjava 2004-05-03

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还有可能是你的库路径的设置顺序，你把你的库路径设置上下顺序调节一下

hummerking 2004-05-03

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如果Ignore all default libraries那更不成了。。。自己手动添加需要的库？？一会儿试一下吧。

hummerking 2004-05-03

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楼上兄弟说的不成啊。。。

LINK : warning LNK4049: locally defined symbol "_sprintf" imported
LINK : warning LNK4049: locally defined symbol "_malloc" imported
LINK : warning LNK4049: locally defined symbol "_free" imported
LINK : warning LNK4049: locally defined symbol "_strncpy" imported
LINK : warning LNK4049: locally defined symbol "__snprintf" imported
LINK : warning LNK4049: locally defined symbol "_realloc" imported
LINK : warning LNK4049: locally defined symbol "__pctype" imported
LINK : warning LNK4049: locally defined symbol "___mb_cur_max" imported
LINK : warning LNK4049: locally defined symbol "_tolower" imported
LINK : warning LNK4049: locally defined symbol "__isctype" imported
LINK : warning LNK4049: locally defined symbol "_strspn" imported
LINK : warning LNK4049: locally defined symbol "_strncmp" imported
LINK : warning LNK4049: locally defined symbol "__errno" imported
LINK : warning LNK4049: locally defined symbol "_strtoul" imported
LINK : warning LNK4049: locally defined symbol "_getenv" imported
LINK : warning LNK4049: locally defined symbol "_atoi" imported
LINK : warning LNK4049: locally defined symbol "_memmove" imported
LINK : warning LNK4049: locally defined symbol "_fclose" imported
LINK : warning LNK4049: locally defined symbol "_fgets" imported
LINK : warning LNK4049: locally defined symbol "_fopen" imported
LINK : warning LNK4049: locally defined symbol "_fflush" imported
LINK : warning LNK4049: locally defined symbol "__iob" imported
LINK : warning LNK4049: locally defined symbol "__vsnprintf" imported
LINK : warning LNK4049: locally defined symbol "_exit" imported
LINK : warning LNK4049: locally defined symbol "__strdup" imported
LINK : warning LNK4049: locally defined symbol "__stricmp" imported
libpq.lib(fe-exec.obj) : error LNK2001: unresolved external symbol __imp__strdup
libpq.lib(fe-connect.obj) : error LNK2001: unresolved external symbol __imp__strdup
OLDNAMES.lib(strdup.obi) : error LNK2001: unresolved external symbol __imp__strdup
libpq.lib(fe-connect.obj) : error LNK2001: unresolved external symbol __imp__stricmp
OLDNAMES.lib(stricmp.obi) : error LNK2001: unresolved external symbol __imp__stricmp
libpq.lib(fe-connect.obj) : error LNK2001: unresolved external symbol __imp__strtok
libpq.lib(fe-connect.obj) : error LNK2001: unresolved external symbol __imp__fprintf
libpq.lib(fe-misc.obj) : error LNK2001: unresolved external symbol __imp__fprintf
libpq.lib(dllist.obj) : error LNK2001: unresolved external symbol __imp__fprintf
libpq.lib(fe-auth.obj) : error LNK2001: unresolved external symbol __imp__perror
Debug/dataman.exe : fatal error LNK1120: 5 unresolved externals

SatanLi1982 2004-05-02

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还有，可能是你的头文件包含有问题。

anothervip 2004-05-02

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在project setting中的link tab下，选中ignore default lib。然后自己加要用的库。

SatanLi1982 2004-05-02

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Project->settings->Link->Select Ignore all default libraries

aspvbjava 2004-05-02

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project-->setting-->link-->project options里面，加入
/NODEFAULTLIB:MSVCRT.lib

在编译中遇到 defaultlib "MSVCRT" conflicts with use of other libs 怎么解决？？急！！！

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