x11-misc/3dfm: add eautoreconf for modern C

Closes: https://bugs.gentoo.org/898238
Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>

x11-misc/3dfm/3dfm-1.0-r3.ebuild

@@ -3,6 +3,8 @@
 
 EAPI=8
 
+inherit autotools
+
 DESCRIPTION="OpenGL-based 3D File Manager"
 HOMEPAGE="https://sourceforge.net/projects/innolab/"
 SRC_URI="https://downloads.sourceforge.net/innolab/${P}.tar.gz"
@@ -17,6 +19,11 @@ RDEPEND="
 	media-libs/freeglut"
 DEPEND="${RDEPEND}"
 
+src_prepare() {
+	default
+	eautoreconf
+}
+
 src_install() {
 	default
 	mv "${ED}"/usr/bin/{interface,3dfm} || die