gentoo-overlay/sys-libs/libcap/files/libcap-2.21-include.patch

--- libcap/libcap.h.org	2011-06-15 07:25:58.912480899 +0200
+++ libcap/libcap.h	2011-06-15 07:26:16.421329661 +0200
@@ -13,6 +13,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/capability.h>
+#include <sys/prctl.h> /* prctl() */
 
 #ifndef __u8
 #define __u8    unsigned char