--- /usr/portage/app-antivirus/clamav/clamav-0.99.2.ebuild	2016-05-23 23:31:32.000000000 +0200
+++ /usr/portage/app-antivirus/clamav/clamav-0.99.2.ebuild	2016-06-02 16:27:13.288427986 +0200
@@ -13,14 +13,15 @@ 
 
 LICENSE="GPL-2"
 SLOT="0"
-KEYWORDS="~alpha ~amd64 ~arm ~hppa ~ia64 ~ppc ~ppc64 ~sparc ~x86 ~x86-fbsd ~amd64-linux ~x86-linux ~ppc-macos ~sparc-solaris ~x86-solaris"
-IUSE="bzip2 clamdtop iconv ipv6 libressl milter metadata-analysis-api selinux static-libs uclibc"
+KEYWORDS="~alpha amd64 ~arm ~hppa ~ia64 ~ppc ~ppc64 ~sparc ~x86 ~x86-fbsd ~amd64-linux ~x86-linux ~ppc-macos ~sparc-solaris ~x86-solaris"
+IUSE="bzip2 clamdtop iconv ipv6 libressl milter metadata-analysis-api selinux static-libs uclibc system-llvm"
 
 CDEPEND="bzip2? ( app-arch/bzip2 )
 	clamdtop? ( sys-libs/ncurses:0 )
 	iconv? ( virtual/libiconv )
 	metadata-analysis-api? ( dev-libs/json-c )
 	milter? ( || ( mail-filter/libmilter mail-mta/sendmail ) )
+	system-llvm? ( sys-devel/llvm )
 	dev-libs/libtommath
 	>=sys-libs/zlib-1.2.2
 	!libressl? ( dev-libs/openssl:0= )
@@ -49,6 +50,13 @@ 
 }
 
 src_configure() {
+
+	local myconf=(
+		$(use_with system-llvm)
+	)
+	use system-llvm && use static-libs && myconf+=( --with-llvm-linking=static )
+	use system-llvm && use !static-libs && myconf+=( --with-llvm-linking=dynamic )
+
 	econf \
 		--disable-experimental \
 		--disable-fanotify \
@@ -62,7 +70,8 @@ 
 		$(use_enable milter) \
 		$(use_enable static-libs static) \
 		$(use_with iconv) \
-		$(use_with metadata-analysis-api libjson /usr)
+		$(use_with metadata-analysis-api libjson /usr) \
+		${myconf[@]}
 }
 
 src_install() {