http://bugs.gentoo.org/423757

--- libcyberjack/checksuite/cm_distri.cpp
+++ libcyberjack/checksuite/cm_distri.cpp
@@ -15,6 +15,7 @@
 #include "cm_distri.h"
 #include "checksuite.h"
 
+#include <unistd.h> /* unlink */
 #include <stdlib.h>
 #include <stdio.h>
 #include <errno.h>
--- tools/fox-dialog/main.cpp
+++ tools/fox-dialog/main.cpp
@@ -9,6 +9,8 @@
 
 #include <fx.h>
 
+#include <unistd.h> /* unlink */
+
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <pwd.h>
--- tools/mac-ui-helper/main.m
+++ tools/mac-ui-helper/main.m
@@ -31,6 +31,8 @@
 #import "PinDialog.h"
 #import "Delegate.h"
 
+#include <unistd.h> /* unlink */
+
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <pwd.h>