1 files changed, 15 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libstdio/vfprintf.c b/mdk-stage1/dietlibc/libstdio/vfprintf.c
new file mode 100644
index 000000000..5e64cf099
--- /dev/null
+++ b/mdk-stage1/dietlibc/libstdio/vfprintf.c
@@ -0,0 +1,15 @@
+#include <stdarg.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include "dietstdio.h"
+
+static int __fwrite(void*ptr, size_t nmemb, FILE* f) {
+  return fwrite(ptr,1,nmemb,f);
+}
+
+int vfprintf(FILE *stream, const char *format, va_list arg_ptr)
+{
+  struct arg_printf ap = { stream, (int(*)(void*,size_t,void*)) __fwrite };
+  return __v_printf(&ap,format,arg_ptr);
+}