diff -urN old/files/lsof-4.81-aix.patch new/files/lsof-4.81-aix.patch
--- old/files/lsof-4.81-aix.patch	1970-01-01 12:00:00.000000000 +1200
+++ new/files/lsof-4.81-aix.patch	2012-02-27 12:42:06.000000000 +1300
@@ -0,0 +1,13 @@
+Don't ask on stdin for changing the value of HASXOPT_ROOT.
+
+--- Customize.orig	2009-07-28 11:59:23 +0200
++++ Customize	2009-07-28 12:58:41 +0200
+@@ -860,7 +860,7 @@
+     do
+       echo ""
+       echo $EO "Do you want to $HXR HASXOPT_ROOT (y|n) [n]? $EC"
+-      read ANS EXCESS
++      ANS= # read ANS EXCESS
+       if test "X$ANS" = "Xy" -o "X$ANS" = "XY"
+       then
+         HXRA=1
diff -urN old/lsof-4.85-r2.ebuild new/lsof-4.85-r2.ebuild
--- old/lsof-4.85-r2.ebuild	2012-02-27 12:42:06.000000000 +1300
+++ new/lsof-4.85-r2.ebuild	2012-02-27 12:42:06.000000000 +1300
@@ -15,7 +15,7 @@
 
 LICENSE="lsof"
 SLOT="0"
-KEYWORDS="~alpha ~amd64 ~arm ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86 ~x86-fbsd"
+KEYWORDS="~alpha ~amd64 ~amd64-linux ~arm ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~ppc-aix ~ppc-macos ~s390 ~sh ~sparc ~sparc-solaris ~x64-solaris ~x86 ~x86-fbsd ~x86-freebsd ~x86-linux ~x86-solaris"
 IUSE="examples ipv6 rpc selinux static"
 
 RDEPEND="rpc? ( net-libs/libtirpc )
@@ -28,6 +28,8 @@
 	unpack ${A}
 	cd ${MY_P}
 	unpack ./${MY_P}_src.tar
+	cd "${S}"
+	epatch "${FILESDIR}"/${PN}-4.81-aix.patch #278831
 }
 
 src_prepare() {
@@ -39,7 +41,21 @@
 		Configure || die
 }
 
-target() { usex kernel_FreeBSD freebsd linux ; }
+target() {
+	case ${CHOST} in
+		*-darwin*)  echo darwin  ;;
+		*-freebsd*) echo freebsd ;;
+		*-solaris*) echo solaris ;;
+		*-aix*)     echo aixgcc  ;;
+		*)          echo linux   ;;
+	esac
+}
+ar() {
+	case ${CHOST} in
+		*-aix*)     echo "ar -X32_64 -v -q" ;;
+		*)          echo "$(tc-getAR) rc"   ;;
+	esac
+}
 src_configure() {
 	use static && append-ldflags -static
 
@@ -55,7 +71,7 @@
 	LINUX_HASSELINUX=$(usex selinux y n) \
 	LSOF_INCLUDE=${T} \
 	LSOF_CC=$(tc-getCC) \
-	LSOF_AR="$(tc-getAR) rc" \
+	LSOF_AR="$(ar)" \
 	LSOF_RANLIB=$(tc-getRANLIB) \
 	LSOF_CFGF="${CFLAGS} ${CPPFLAGS}" \
 	./Configure -n $(target) || die
@@ -76,3 +92,10 @@
 	doman lsof.8 || die
 	dodoc 00*
 }
+
+pkg_postinst() {
+	if [[ ${CHOST} == *-solaris* ]] ; then
+		einfo "Note: to use lsof on Solaris you need read permissions on"
+		einfo "/dev/kmem, i.e. you need to be root, or to be in the group sys"
+	fi
+}