You must use only one standard C run-time library when you link. You can control which library is used in one of two ways:
In the Programmer's WorkBench, pull down the Project menu, open the Edit Project dialog box, and add the name of the C run-time library file to the project. Then pull down the Options menu, open the LINK Options dialog box, and select the No Default Library Search option.
From the LINK command line, give the /NODEFAULTLIBRARYSEARCH (/NOD) option and then specify the name of the combined library file you want to use in the link-libinfo field of the CL command line. This overrides the library names embedded in the object files.