title: error LNK2001: unresolved external symbol _fltused in wdk
body: <p>I am trying to define a double data type variable in a C code which is going to be used in the Windows kernel. The code compiles but gives error while linking. I tried using libcntpr.lib in the source file and also defining __fltused variable in the code but to no avail. I'll really appreciate if someone can help me on how to use this.</p>