--- exim-4.80.ebuild	2012-08-25 08:01:18.000000000 +0200
+++ exim-4.80-r1.ebuild	2012-09-28 10:14:00.094807273 +0200
@@ -6,7 +6,7 @@
 
 inherit eutils toolchain-funcs multilib pam
 
-IUSE="tcpd ssl postgres mysql ldap pam exiscan-acl lmtp ipv6 sasl dnsdb perl mbx X nis syslog spf srs gnutls sqlite doc dovecot-sasl radius maildir +dkim dcc dsn"
+IUSE="dcc +dkim dlfunc dnsdb doc dovecot-sasl dsn exiscan-acl gnutls ipv6 ldap lmtp maildir mbx mysql nis pam perl postgres radius sasl spf sqlite srs ssl syslog tcpd X"
 
 DSN_EXIM_V=469
 DSN_V=1_3
@@ -270,6 +270,10 @@
 		sed -i -e "s:#define SUPPORT_DSN:define SUPPORT_DSN:" Makefile
 	fi
 
+	if use dlfunc; then
+		sed -i -e "s:# EXPAND_DLFUNC=yes:EXPAND_DLFUNC=yes:" Makefile
+	fi
+
 	# use the "native" interface to the DBM library
 	echo "USE_DB=yes" >> Makefile
 	echo "DBMLIB=-ldb" >> Makefile
@@ -332,6 +336,12 @@
 
 	DIROPTIONS="--mode=0750 --owner=${MAILUSER} --group=${MAILGROUP}"
 	dodir /var/log/${PN}
+	dodir /usr/include/${PN}
+	insinto /usr/include/${PN}
+	local f
+	for f in config.h local_scan.h mytypes.h store.h; do
+		doins "${S}"/build-exim-gentoo/"${f}" || die "doheaders died"
+	done
 }
 
 pkg_postinst() {