Getting the following error trying to build a C client using Visual Studio 2015 (VS2015).
C:\Program Files (x86)\Windows Kits\8.1\include\\um\winnt.h(31): fatal error C1083: Cannot open include file: 'ctype.h': No such file or directory
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\cl.EXE"' : return code '0x2'
Release : 8.6