mingw doesn't understand %llu/%lld - it treats them as 32-bit rather
than 64-bit. We use %I64u/%I64d instead.
#define FMT_Word64 "lu"
#define FMT_Int64 "ld"
#else
+#if defined(mingw32_HOST_OS)
+/* mingw doesn't understand %llu/%lld - it treats them as 32-bit
+ rather than 64-bit */
+#define FMT_Word64 "I64u"
+#define FMT_Int64 "I64d"
+#else
#define FMT_Word64 "llu"
#define FMT_Int64 "lld"
#endif
+#endif
/* -----------------------------------------------------------------------------
Include everything STG-ish