1 files changed, 20 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libstdio/fputc_unlocked.c b/mdk-stage1/dietlibc/libstdio/fputc_unlocked.c
new file mode 100644
index 000000000..6441c5741
--- /dev/null
+++ b/mdk-stage1/dietlibc/libstdio/fputc_unlocked.c
@@ -0,0 +1,20 @@
+#include <dietstdio.h>
+#include <unistd.h>
+
+int fputc_unlocked(int c, FILE *stream) {
+  if (__fflush4(stream,0)) return EOF;
+  if (stream->bm>=stream->buflen-1)
+    if (fflush(stream)) return EOF;
+  if (stream->flags&NOBUF) {
+    if (write(stream->fd,&c,1) != 1) return EOF;
+    return 0;
+  }
+  stream->buf[stream->bm]=c;
+  ++stream->bm;
+  if (((stream->flags&BUFLINEWISE) && c=='\n') ||
+      ((stream->flags&NOBUF))) /* puke */
+    if (fflush(stream)) return EOF;
+  return 0;
+}
+
+int fputc(int c,FILE* stream) __attribute__((weak,alias("fputc_unlocked")));