app-crypt/efitools: support "static" USE flag

If "static" USE flag is set, it makes sense to do static link for
user-space executables.

app-crypt/efitools/efitools-1.8.1.ebuild

@@ -12,15 +12,21 @@ SRC_URI="https://git.kernel.org/pub/scm/linux/kernel/git/jejb/efitools.git/snaps
 LICENSE="GPL-2 LGPL-2.1"
 SLOT="0"
 KEYWORDS="~amd64 ~arm64 ~x86"
-IUSE="libressl"
+IUSE="libressl static"
 
-RDEPEND="!libressl? ( dev-libs/openssl:0= )
-	libressl? ( dev-libs/libressl:0= )
+LIB_DEPEND="!libressl? ( dev-libs/openssl:0=[static-libs(+)] )
+	libressl? ( dev-libs/libressl:0=[static-libs(+)] )"
+
+RDEPEND="!static? ( ${LIB_DEPEND//\[static-libs(+)]} )
 	sys-apps/util-linux"
 
 DEPEND="${RDEPEND}
 	app-crypt/sbsigntool
 	dev-perl/File-Slurp
+	static? (
+		${LIB_DEPEND}
+		dev-util/pkgconfig
+	)
 	sys-apps/help2man
 	sys-boot/gnu-efi
 	virtual/pkgconfig"
@@ -31,6 +37,11 @@ PATCHES=(
 )
 
 src_prepare() {
+	if use static; then
+		append-ldflags -static
+		sed -i 's/-lcrypto/`pkg-config --static --libs libcrypto`/g' Makefile || die
+	fi
+
 	# Respect users CFLAGS
 	sed -i -e 's/CFLAGS.*= -O2 -g/CFLAGS += /' Make.rules || die