diff -u -r /home/fornwall/lib/android-ndk/platforms/android-19/arch-arm/usr/include/unistd.h ./usr/include/unistd.h
--- /home/fornwall/lib/android-ndk/platforms/android-19/arch-arm/usr/include/unistd.h	2012-08-21 07:23:12.000000000 +0200
+++ ./usr/include/unistd.h	2014-07-09 09:55:58.443639544 +0200
@@ -35,6 +35,7 @@
 #include <sys/sysconf.h>
 #include <linux/capability.h>
 #include <pathconf.h>
+#include <asm/unistd.h>
 
 __BEGIN_DECLS
 
@@ -166,6 +174,43 @@
 extern char* ttyname(int);
 extern int ttyname_r(int, char*, size_t);
 
+/* start android polyfill of ttyname(3) and ttyname_r(3) */
+#define ttyname(a) android_polyfill_ttyname(a)
+#define ttyname_r(a, b, c) android_polyfill_ttyname_r(a, b, c)
+
+static int android_polyfill_ttyname_r(int fd, char* buf, size_t buflen)
+{
+	char symlink_path[32] = "/proc/self/fd/";
+	ssize_t siz;
+
+	if (!isatty(fd)) return -1;
+
+	/* Would like to do sprintf(symlink_path, "/proc/self/fd/%d", fd), but stdio.h may not be included. */
+	int shifter = fd;
+	char* p = symlink_path + 14;
+	do {
+		p++;
+		shifter = shifter / 10;
+	} while(shifter);
+	*p = '\0';
+	do {
+		*--p = (fd % 10) + '0';
+		fd = fd / 10;
+	} while (fd);
+
+	siz = readlink(symlink_path, buf, buflen);
+	if (siz < 0 || siz == buflen) return -1;
+	buf[siz] = '\0';
+	return 0;
+}
+
+static char* android_polyfill_ttyname(int fd)
+{
+	static char buf[32];
+	return (ttyname_r(fd, buf, sizeof(buf)) == 0) ? buf : NULL;
+}
+/* end android polyfill of ttyname(3) and ttyname_r(3) */
+
 extern int  acct(const char*  filepath);
 
 static __inline__ int getpagesize(void) {