Use LIB.EXE to create a library (.lib) for each version of the .obj files.
http://msdn.microsoft.com/en-us/libr...8VS.60%29.aspx

Then use #pragma comment(lib, "mylib.lib") to link against one version or the other.
http://msdn.microsoft.com/en-us/libr...8VS.60%29.aspx

gg