Check for vsnprintf and _vsnprintf, and define vsnprintf with

configure

@@ -13148,6 +13148,8 @@ fi
 
 
 
+
+
 for ac_func in \
 	_lwp_create \
 	_pclose \
@@ -13155,6 +13157,7 @@ for ac_func in \
 	_snprintf \
 	_stricmp \
 	_strnicmp \
+	_vsnprintf \
 	chsize \
 	clone \
 	ecvt \
@@ -13202,6 +13205,7 @@ for ac_func in \
 	timegm \
 	usleep \
 	vfscanf \
+	vsnprintf \
 	wait4 \
 	waitpid \
 

configure.ac

@@ -936,6 +936,7 @@ AC_CHECK_FUNCS(\
 	_snprintf \
 	_stricmp \
 	_strnicmp \
+	_vsnprintf \
 	chsize \
 	clone \
 	ecvt \
@@ -983,6 +984,7 @@ AC_CHECK_FUNCS(\
 	timegm \
 	usleep \
 	vfscanf \
+	vsnprintf \
 	wait4 \
 	waitpid \
 )

include/config.h.in

@@ -638,6 +638,9 @@
 /* Define to 1 if you have the `vfscanf' function. */
 #undef HAVE_VFSCANF
 
+/* Define to 1 if you have the `vsnprintf' function. */
+#undef HAVE_VSNPRINTF
+
 /* Define to 1 if you have the `wait4' function. */
 #undef HAVE_WAIT4
 
@@ -695,6 +698,9 @@
 /* Define to 1 if you have the `_strnicmp' function. */
 #undef HAVE__STRNICMP
 
+/* Define to 1 if you have the `_vsnprintf' function. */
+#undef HAVE__VSNPRINTF
+
 /* Define if we have __va_copy */
 #undef HAVE___VA_COPY
 

include/wine/port.h

@@ -103,6 +103,10 @@ struct statfs;
 #define snprintf _snprintf
 #endif
 
+#if !defined(HAVE_VSNPRINTF) && defined(HAVE__VSNPRINTF)
+#define vsnprintf _vsnprintf
+#endif
+
 #ifndef S_ISLNK
 # define S_ISLNK(mod) (0)
 #endif /* S_ISLNK */