Fix cling compilation errors on Windows (with VS 2015)

CMakeLists.txt

@@ -89,7 +89,7 @@ string(REPLACE "-fvisibility=hidden" "" CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
 
 # The package needs to be compiler without RTTI information
 if(MSVC)
-  add_definitions(/GR-)
+  add_definitions(/GR- /DNOMINMAX)
 else()
   add_definitions(-fno-rtti)
 endif()

include/cling/Utils/Validation.h

@@ -13,6 +13,8 @@
 #include <assert.h>
 #include <errno.h>
 #ifdef LLVM_ON_WIN32
+# define WIN32_LEAN_AND_MEAN
+# define NOGDI
 # include <Windows.h>
 #else
 # include <unistd.h>

lib/Interpreter/IncrementalParser.cpp

@@ -89,7 +89,11 @@ namespace {
 #endif
 #ifdef _MSC_VER
     HKEY regVS;
+#if (_MSC_VER >= 1900)
+    int VSVersion = (_MSC_VER / 100) - 5;
+#else
     int VSVersion = (_MSC_VER / 100) - 6;
+#endif
     std::stringstream subKey;
     subKey << "VisualStudio.DTE." << VSVersion << ".0";
     if (RegOpenKeyEx(HKEY_CLASSES_ROOT, subKey.str().c_str(), 0, KEY_READ, &regVS) == ERROR_SUCCESS) {

tools/Jupyter/Kernel.cpp

@@ -20,6 +20,12 @@
 #include <string>
 #include <cstring>
 #include <unistd.h>
+#ifndef _MSC_VER
+# include <unistd.h>
+#else
+# include <io.h>
+# define write _write
+#endif
 
 // FIXME: should be moved into a Jupyter interp struct that then gets returned
 // from create.