--- include/winnt.h	2013-08-31 12:40:55.422343650 +0200
+++ include/winnt.h	2013-08-31 12:43:39.036686882 +0200
@@ -107,6 +107,11 @@
 #endif
 typedef void* __ptr64 PVOID64;
 
+#ifndef _ERRCODE_DEFINED
+#define _ERRCODE_DEFINED
+typedef int errno_t;
+#endif
+
 #ifndef _WCHAR_T_DEFINED
 #define _WCHAR_T_DEFINED
 #ifndef _WCHAR_T_
--- include/stdlib.h	2013-08-31 12:27:41.321139008 +0200
+++ include/stdlib.h	2013-08-31 12:35:18.970541797 +0200
@@ -232,6 +232,10 @@
 _CRTIMP int __cdecl __MINGW_NOTHROW rand (void);
 _CRTIMP void __cdecl __MINGW_NOTHROW srand (unsigned int);
 
+#if defined (_CRT_RAND_S) && (WINVER >= 0x0501)
+_CRTIMP errno_t __cdecl __MINGW_NOTHROW rand_s (unsigned int*);
+#endif
+
 _CRTIMP void* __cdecl __MINGW_NOTHROW calloc (size_t, size_t) __MINGW_ATTRIB_MALLOC;
 _CRTIMP void* __cdecl __MINGW_NOTHROW malloc (size_t) __MINGW_ATTRIB_MALLOC;
 _CRTIMP void* __cdecl __MINGW_NOTHROW realloc (void*, size_t);
--- lib/lib32/msvcrt.def.in	2013-08-31 12:45:45.477904906 +0200
+++ lib/lib32/msvcrt.def.in	2013-08-31 12:47:45.044353824 +0200
@@ -637,6 +637,7 @@
 qsort
 raise
 rand
+rand_s
 realloc
 remove
 rename