Work on Windows port by Ruben Van Boxem

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@140384 91177308-0d34-0410-b5e6-96231b3b80d8

include/support/win32/support.h

@@ -12,4 +12,12 @@
    Functions and constants used in libc++ that are missing from the Windows C library.
   */
 
+#if __MINGW32__
+#include <stdio.h>
+#define swprintf snwprintf
+#endif // __MINGW32__
 int vasprintf( char **sptr, const char *__restrict__ fmt , va_list ap );
+size_t mbsnrtowcs( wchar_t *__restrict__ dst, const char **__restrict__ src,
+                   size_t nmc, size_t len, mbstate_t *__restrict__ ps );
+size_t wcsnrtombs( char *__restrict__ dst, const wchar_t **__restrict__ src,
+                   size_t nwc, size_t len, mbstate_t *__restrict__ ps );