diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/sys/wait.h ./usr/include/sys/wait.h
--- /home/fornwall/lib/android-ndk/sysroot/usr/include/sys/wait.h	2017-06-07 01:07:52.000000000 +0200
+++ ./usr/include/sys/wait.h	2017-06-18 02:11:22.268075841 +0200
@@ -57,6 +57,9 @@
 // Implemented as a static inline before 18.
 #endif
 
+/* Termux addition: Add wait3() declaration used by busybox. Available in libc for 32-bit only. */
+static pid_t wait3(int* status, int options, struct rusage* rusage) { return wait4(-1, status, options, rusage); }
+
 /* Posix states that idtype_t should be an enumeration type, but
  * the kernel headers define P_ALL, P_PID and P_PGID as constant macros
  * instead.