Encoding: Help enforce the use of wide apis on Windows.

Compile flags -DUNICODE and -D_UNICODE are added.
This means that using ANSI or wide apis must be explicit.

Change-Id: Ia0fa72f563e1ee8591f6ca3c02b060abcb801a7c

CMakeLists.txt

@@ -1073,6 +1073,11 @@ IF(MSVC OR (WIN32 AND "${CMAKE_C_COMPILER_ID}" MATCHES "^(Intel)$"))
     )
 ENDIF()
 
+IF(WIN32)
+  # Help enforce the use of wide Windows apis.
+  ADD_DEFINITIONS(-DUNICODE -D_UNICODE)
+ENDIF()
+
 IF(KWSYS_USE_String)
   # Activate code in "String.c".  See the comment in the source.
   SET_SOURCE_FILES_PROPERTIES(String.c PROPERTIES

SharedForward.h.in

@@ -415,7 +415,7 @@ static int kwsys_shared_forward_realpath(const char* in_path, char* out_path)
 {
 #if defined(_WIN32) && !defined(__CYGWIN__)
   /* Implementation for Windows.  */
-  DWORD n = GetFullPathName(in_path, KWSYS_SHARED_FORWARD_MAXPATH,
+  DWORD n = GetFullPathNameA(in_path, KWSYS_SHARED_FORWARD_MAXPATH,
                             out_path, 0);
   return n > 0 && n <= KWSYS_SHARED_FORWARD_MAXPATH;
 #else
@@ -429,9 +429,9 @@ static int kwsys_shared_forward_samepath(const char* file1, const char* file2)
 {
 #if defined(_WIN32)
   int result = 0;
-  HANDLE h1 = CreateFile(file1, GENERIC_READ, FILE_SHARE_READ, NULL,
+  HANDLE h1 = CreateFileA(file1, GENERIC_READ, FILE_SHARE_READ, NULL,
                          OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
-  HANDLE h2 = CreateFile(file2, GENERIC_READ, FILE_SHARE_READ, NULL,
+  HANDLE h2 = CreateFileA(file2, GENERIC_READ, FILE_SHARE_READ, NULL,
                          OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
   if(h1 != INVALID_HANDLE_VALUE && h2 != INVALID_HANDLE_VALUE)
     {
@@ -462,7 +462,7 @@ static void kwsys_shared_forward_strerror(char* message)
 #if defined(_WIN32) && !defined(__CYGWIN__)
   /* Implementation for Windows.  */
   DWORD original = GetLastError();
-  DWORD length = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM |
+  DWORD length = FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM |
                                FORMAT_MESSAGE_IGNORE_INSERTS, 0, original,
                                MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                                message, KWSYS_SHARED_FORWARD_MAXPATH, 0);