1 files changed, 15 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/lib/vfprintf.c b/mdk-stage1/dietlibc/lib/vfprintf.c
new file mode 100644
index 000000000..0ebfd1561
--- /dev/null
+++ b/mdk-stage1/dietlibc/lib/vfprintf.c
@@ -0,0 +1,15 @@
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int vfprintf(FILE *fstream, const char *format, va_list ap)
+{
+  char *tmp;
+  size_t n=vsnprintf(0, 1000000, format, ap);
+  tmp=alloca(n+2);
+  if (tmp) {
+    vsnprintf(tmp, n+1, format, ap);
+    fwrite(tmp, n,1, fstream);
+  }
+  return n;
+}