dev-libs/cjose: fix doc install

Closes: https://bugs.gentoo.org/980674
Signed-off-by: Arthur Zamarin <arthurzam@gentoo.org>

dev-libs/cjose/cjose-0.6.2.8.ebuild

@@ -12,7 +12,7 @@ SRC_URI="https://github.com/OpenIDC/cjose/releases/download/v${PV}/${P}.tar.gz"
 LICENSE="MIT"
 SLOT="0"
 KEYWORDS="~amd64 ~x86"
-IUSE="doc test"
+IUSE="+doc test"
 RESTRICT="!test? ( test )"
 
 RDEPEND="
@@ -42,6 +42,12 @@ src_configure() {
 	econf "${myconf[@]}"
 }
 
+src_compile() {
+	emake
+	# need to invoke doc generation, otherwise it doesn't get installed properly
+	use doc && emake doxygen
+}
+
 src_install() {
 	default
 	find "${ED}" -type f -name '*.la' -delete || die