--- polkit-0.105/test/mocklibc/src/pwd.c.old 2012-04-24 11:05:34.000000000 -0500 +++ polkit-0.105/test/mocklibc/src/pwd.c 2017-09-27 19:40:57.883227673 -0500 @@ -16,6 +16,7 @@ * Author: Nikki VonHollen <vonhollen@gmail.com> */ +#define _GNU_SOURCE #include <pwd.h> #include <stdio.h> --- polkit-0.105/test/mocklibc/src/grp.c.old 2012-04-24 11:05:34.000000000 -0500 +++ polkit-0.105/test/mocklibc/src/grp.c 2017-09-27 19:44:57.759238450 -0500 @@ -16,6 +16,7 @@ * Author: Nikki VonHollen <vonhollen@gmail.com> */ +#define _GNU_SOURCE #include <grp.h> #include <stdio.h>