LNK2005: find the module which was built with /MT

Question

I'm trying to build C++ project (mapserver). It depends on some other projects.

When I run nmake, it shows many errors like this:

...
LIBCMTD.lib(getenv.obj) : error LNK2005: _getenv already defined in MSVCRT.lib(MSVCR90.dll)
LIBCMTD.lib(tolower.obj) : error LNK2005: _tolower already defined in MSVCRT.lib(MSVCR90.dll)
LIBCMTD.lib(fflush.obj) : error LNK2005: _fflush already defined in MSVCRT.lib(MSVCR90.dll)
MSVCRT.lib(MSVCR90.dll) : error LNK2005: __strnicmp already defined in LIBCMTD.lib(strnicmp.obj)
...

I know it is caused by /MD and /MT options when they differs from project to project.

I checked all project's build files and have found only one with /MT. I changed it to /MD and rebuilt it, but error remained.

How to find a library caused this error?

Thanks for all!

P.S. Project list:

curl-7.24.0
expat-2.0.1
freetype-2.4.8
gdal-1.9.0
gdwin32
jpeg-6b
lpng158
mapserver <-- main
postgresql-8.4.9
proj-4.7.0
regex-0.12

zlib

Answer 1

The solution turned out very simple.

I run dumpbin on each library that main program uses. One of them was compiled with

/DEFAULTLIB:"LIBCMTD"

that means /MT option.

P.S. It is interesting, that build file didn't contain /MT or /MTd options. Instead, it included

<win32.mak>

with

!IFDEF NODEBUG
cvarsmt    = $(noansi) -D_MT -MT
cvars      = $(cvarsmt)
cvarsdll   = $(noansi) -D_MT -D_DLL -MD
!ELSE
cvarsmt    = $(noansi) -D_MT -MTd
cvars      = $(cvarsmt)
cvarsdll   = $(noansi) -D_MT -D_DLL -MDd
!ENDIF

The makefile contained

CFLAGS= $(cflags) $(cdebug) $(cvars) -I.

I replaced it with

CFLAGS= $(cflags) $(cdebug) $(noansi) -D_MD -MDd -I.

and all begun to work.

Answer 2

Look at this KB

http://msdn.microsoft.com/en-us/library/6wtdswk0(v=vs.71).aspx

Use the ignore libraries line based on the build you are trying to do. If a library you are using needs that library, you will get a Symbol not Found for that library and you can fix it.

Also, you can use dumpbin to find out what a library will try to link to.