>我正在将一个大型Visual Studio解决方案从VS 2010转换为VS 2017。解决方案中的一个项目仅包含 C，不包含C++，并使用/MT进行编译以静态链接到多线程 C 运行时。
不幸的是，链接器似乎找不到 C 运行时函数，即使libcmt.lib在库列表中也是如此。链接器实际上说这个库在详细输出中未使用。
为什么链接器找不到函数？
输出：
redacted.obj : error LNK2019: unresolved external symbol memcpy referenced in function FsConvertAndFreeInformation
redacted.obj : error LNK2019: unresolved external symbol memset referenced in function FsInitDebugSocket
msvcrt.lib(utility_desktop.obj) : error LNK2001: unresolved external symbol memset
redacted.obj : error LNK2019: unresolved external symbol wcsstr referenced in function FsGetTokenInformation
redacted.obj : error LNK2019: unresolved external symbol wcscat_s referenced in function FsGetTokenInformation
redacted.obj : error LNK2019: unresolved external symbol wcsncpy_s referenced in function FsGetTokenInformation
redacted.obj : error LNK2019: unresolved external symbol _wcsdup referenced in function LsaApLogonUserEx2
redacted.obj : error LNK2019: unresolved external symbol wcscpy referenced in function SetUnicodeString
redacted.obj : error LNK2019: unresolved external symbol wcslen referenced in function FsDebugLog
redacted.obj : error LNK2019: unresolved external symbol _wcsicmp referenced in function LsaApLogonUserEx2
redacted.obj : error LNK2019: unresolved external symbol strlen referenced in function AnsiToUnicode
redacted.obj : error LNK2019: unresolved external symbol free referenced in function LsaApLogonUserEx2
redacted.obj : error LNK2019: unresolved external symbol mbstowcs referenced in function AnsiToUnicode
redacted.obj : error LNK2019: unresolved external symbol __stdio_common_vswprintf referenced in function _vsnwprintf_l
msvcrt.lib(dll_dllmain.obj) : error LNK2019: unresolved external symbol _initterm referenced in function "int __cdecl dllmain_crt_process_attach(struct HINSTANCE__ * const,void * const)" (?dllmain_crt_process_attach@@YAHQEAUHINSTANCE__@@QEAX@Z)
msvcrt.lib(dll_dllmain.obj) : error LNK2019: unresolved external symbol _initterm_e referenced in function "int __cdecl dllmain_crt_process_attach(struct HINSTANCE__ * const,void * const)" (?dllmain_crt_process_attach@@YAHQEAUHINSTANCE__@@QEAX@Z)
msvcrt.lib(dll_dllmain.obj) : error LNK2001: unresolved external symbol __C_specific_handler
msvcrt.lib(utility.obj) : error LNK2001: unresolved external symbol __C_specific_handler
msvcrt.lib(tncleanup.obj) : error LNK2019: unresolved external symbol __std_type_info_destroy_list referenced in function "void __cdecl __scrt_uninitialize_type_info(void)" (?__scrt_uninitialize_type_info@@YAXXZ)
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol _seh_filter_dll referenced in function __scrt_dllmain_exception_filter
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol _configure_narrow_argv referenced in function "public: static int __cdecl __scrt_narrow_argv_policy::configure_argv(void)" (?configure_argv@__scrt_narrow_argv_policy@@SAHXZ)
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol _initialize_narrow_environment referenced in function "public: static int __cdecl __scrt_narrow_environment_policy::initialize_environment(void)" (?initialize_environment@__scrt_narrow_environment_policy@@SAHXZ)
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol _initialize_onexit_table referenced in function __scrt_initialize_onexit_tables
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol _register_onexit_function referenced in function _onexit
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol _execute_onexit_table referenced in function __scrt_dllmain_uninitialize_c
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol _crt_atexit referenced in function _onexit
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol _crt_at_quick_exit referenced in function at_quick_exit
msvcrt.lib(utility.obj) : error LNK2019: unresolved external symbol _cexit referenced in function __scrt_dllmain_uninitialize_c
msvcrt.lib(utility_desktop.obj) : error LNK2019: unresolved external symbol terminate referenced in function __scrt_unhandled_exception_filter
Unused libraries:
C:Program Files (x86)Windows Kits10lib10.0.17134.0umx64odbc32.lib
C:Program Files (x86)Windows Kits10lib10.0.17134.0umx64odbccp32.lib
C:Program Files (x86)Microsoft Visual Studio2017ProfessionalVCToolsMSVC14.15.26726libx64libcmt.lib
C:Program Files (x86)Windows Kits10lib10.0.17134.0umx64user32.lib
C:Program Files (x86)Windows Kits10lib10.0.17134.0umx64gdi32.lib
C:Program Files (x86)Windows Kits10lib10.0.17134.0umx64winspool.lib
C:Program Files (x86)Windows Kits10lib10.0.17134.0umx64comdlg32.lib
C:Program Files (x86)Windows Kits10lib10.0.17134.0umx64shell32.lib
C:Program Files (x86)Windows Kits10lib10.0.17134.0umx64ole32.lib
C:Program Files (x86)Windows Kits10lib10.0.17134.0umx64oleaut32.lib
C:Program Files (x86)Windows Kits10lib10.0.17134.0umx64uuid.lib
编译器命令行选项：
/FR"x64ReleaseU"
/GS
/W2
/Zc:wchar_t
/Zi
/Gm-
/Od
/Fd"x64ReleaseUvc141.pdb"
/Zc:inline
/fp:precise
/D "WIN32"
/D "NDEBUG"
/D "_WINDOWS"
/D "_MBCS"
/D "_USRDLL"
/D "SECURITY_WIN32"
/D "REDACTED_EXPORTS"
/D "UNICODE"
/D "_BIND_TO_CURRENT_VCLIBS_VERSION=1"
/D "_VC80_UPGRADE=0x0600"
/D "_WINDLL"
/D "_UNICODE"
/errorReport:prompt
/WX
/Zc:forScope
/Gd
/MT
/FC
/Fa"x64ReleaseU"
/EHsc
/nologo
/Fo"x64ReleaseU"
/Fp"x64ReleaseUredacted.pch"
/diagnostics:classic
链接器命令行选项：
/OUT:"C:Develredactedsrcx64ReleaseUredacted.dll"
/MANIFEST
/PDB:"C:Develredactedsrcpdbmap/x64/redacted.pdb"
/DYNAMICBASE:NO
"odbc32.lib" "odbccp32.lib" "netapi32.lib" "msvcrt.lib" "Ws2_32.lib" "authz.lib" "libcmt.lib" "kernel32.lib" "user32.lib" "gdi32.lib" "winspool.lib" "comdlg32.lib" "advapi32.lib" "shell32.lib" "ole32.lib" "oleaut32.lib" "uuid.lib"
/DEF:".redacted.def"
/IMPLIB:"C:Develredactedsrcx64ReleaseUredacted.lib"
/DEBUG
/DLL
/MACHINE:X64
/INCREMENTAL:NO
/PGD:"C:Develredactedsrcx64ReleaseUredacted.pgd"
/MANIFESTUAC:"level='asInvoker' uiAccess='false'"
/ManifestFile:"x64ReleaseUredacted.dll.intermediate.manifest"
/MAP":C:Develredactedsrcpdbmap/x64/redacted.map"
/ERRORREPORT:PROMPT
/NOLOGO
/VERBOSE
/NODEFAULTLIB
/TLBID:1
事实证明，这些功能在Visual C++ 2015中被移动到vcruntime.lib和libucrt.lib中。
由于这个项目已经/NODEFAULTLIB，这两个库需要添加到其他依赖项中。