The index() function has been removed from 64-bit libc and is
a deprecated posix function.
-diff -u -r ../procps-ng-3.3.10/sysctl.c ./sysctl.c
---- ../procps-ng-3.3.10/sysctl.c 2014-09-23 07:40:36.000000000 -0400
-+++ ./sysctl.c 2015-03-21 16:22:00.057039606 -0400
+diff -u -r ../procps-ng-3.3.11/sysctl.c ./sysctl.c
+--- ../procps-ng-3.3.11/sysctl.c 2015-08-09 01:54:54.306117153 -0400
++++ ./sysctl.c 2016-01-03 21:27:00.921667943 -0500
@@ -29,7 +29,9 @@
#include <dirent.h>
#include <errno.h>
@@ -29,7 +29,9 @@
#include <dirent.h>
#include <errno.h>
+@@ -816,7 +822,7 @@
+ program_invocation_short_name);
+
+ for ( ; *argv; argv++) {
+- if (WriteMode || index(*argv, '='))
++ if (WriteMode || strchr(*argv, '='))
+ ReturnCode += WriteSetting(*argv);
+ else
+ ReturnCode += ReadSetting(*argv);