Index: uspace/lib/c/generic/bitops.c
===================================================================
--- uspace/lib/c/generic/bitops.c	(revision 64e63ce189ef9ee6cfebc24570651155fd68b352)
+++ uspace/lib/c/generic/bitops.c	(revision 64e63ce189ef9ee6cfebc24570651155fd68b352)
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2013 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+
+#include <bitops.h>
+
+extern int __popcountsi2(int a)
+{
+	return __builtin_popcount(a);
+}
+
+
+/** @}
+ */
Index: uspace/lib/c/generic/io/io.c
===================================================================
--- uspace/lib/c/generic/io/io.c	(revision d8b47eca6f42cb0337bbfbbd1fcd114ae523a897)
+++ uspace/lib/c/generic/io/io.c	(revision 64e63ce189ef9ee6cfebc24570651155fd68b352)
@@ -192,4 +192,18 @@
 }
 
+/** Set stream buffer.
+ *
+ * When @p buf is NULL, the stream is set as unbuffered, otherwise
+ * full buffering is enabled.
+ */
+void setbuf(FILE *stream, void *buf)
+{
+	if (buf == NULL) {
+		setvbuf(stream, NULL, _IONBF, BUFSIZ);
+	} else {
+		setvbuf(stream, buf, _IOFBF, BUFSIZ);
+	}
+}
+
 static void _setvbuf(FILE *stream)
 {