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https://bugs.gentoo.org/880807 --- a/src/fixio.c +++ b/src/fixio.c @@ -10,9 +10,11 @@ * $Id: fixio.c,v 1.4 2002/01/28 01:16:52 jason Exp $ */ +#define _XOPEN_SOURCE 600 #include <stdio.h> #include <stdlib.h> #include <string.h> +#include <unistd.h> #include "shorten.h" #include "bitshift.h"