Verifying CRT used in library (.lib)

How do I check what runtime library a static library (.lib) in Windows has linked to?

I'm compiling my project with /MDd and I presume a library I'm linking to is using /MTd Multi-threaded Debug

Error   7   error LNK2005: "public: __thiscall std::_Lockit::~_Lockit(void)" (??1_Lockit@std@@QAE@XZ) already defined in libcpmtd.lib(xlock.obj)    C:\...\msvcprtd.lib(MSVCP100D.dll)

LIBCPMTD.LIB = Multithreaded, static link

I know there's an option /NODEFAULTLIB:"libcpmtd.lib" which I've tried and succeeded with, but I'd rather avoid that.

Solution

I was able to fix this doing the following

> dumpbin /DIRECTIVES C:\..\ThirdParty\tidy\windows\lib\libtidy
.lib
Microsoft (R) COFF/PE Dumper Version 10.00.40219.01
Copyright (C) Microsoft Corporation.  All rights reserved.


Dump of file C:\..\ThirdParty\tidy\windows\lib\libtidy.lib

File Type: LIBRARY

   Linker Directives
   -----------------
   /DEFAULTLIB:"LIBCMT"
   /DEFAULTLIB:"OLDNAMES"
...

It's cleary linking to MT. I recompiled the lib using /MDd and it linked fine.