--- tor-0.2.5.10.ebuild	2014-11-01 19:54:37.673072244 +0100
+++ tor-0.2.5.10-r1.ebuild	2014-11-01 19:54:37.675072130 +0100
@@ -17,7 +17,7 @@
 LICENSE="BSD GPL-2"
 SLOT="0"
 KEYWORDS="~amd64 ~arm ~mips ~ppc ~ppc64 ~sparc ~x86 ~x86-fbsd"
-IUSE="-bufferevents +ecc nat-pmp selinux stats tor-hardening transparent-proxy threads test upnp web"
+IUSE="-bufferevents +ecc nat-pmp seccomp selinux stats tor-hardening transparent-proxy threads test upnp web"
 
 DEPEND="dev-libs/openssl
 	sys-libs/zlib
@@ -25,6 +25,7 @@
 	bufferevents? ( dev-libs/libevent[ssl] )
 	nat-pmp? ( net-libs/libnatpmp )
 	upnp? ( net-libs/miniupnpc )
+	seccomp? ( sys-libs/libseccomp )
 	selinux? ( sec-policy/selinux-tor )"
 RDEPEND="${DEPEND}"
 
@@ -50,6 +51,7 @@
 		$(use_enable bufferevents) \
 		$(use_enable ecc curve25519) \
 		$(use_enable nat-pmp) \
+		$(use_enable seccomp) \
 		$(use_enable tor-hardening gcc-hardening) \
 		$(use_enable tor-hardening linker-hardening) \
 		$(use_enable transparent-proxy transparent) \
@@ -96,4 +98,8 @@
 		ewarn "    http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59358"
 		ewarn
 	fi
+
+	if use seccomp; then
+	    elog "You may need to enable \"Sandbox\" option at your torrc config for use of seccomp syscall feature"
+	fi
 }