dev-util/rebar: Fix compatibility with erlang 23.

Closes: https://bugs.gentoo.org/724648
Signed-off-by: Hanno Böck <hanno@gentoo.org>
Package-Manager: Portage-2.3.100, Repoman-2.3.22

dev-util/rebar/files/rebar-erlang23.diff

@@ -0,0 +1,12 @@
+diff -Naurp a/src/rebar_port_compiler.erl b/src/rebar_port_compiler.erl
+--- a/src/rebar_port_compiler.erl	2016-08-31 16:47:31.000000000 +0200
++++ b/src/rebar_port_compiler.erl	2020-05-23 13:03:22.464682124 +0200
+@@ -673,7 +673,7 @@ default_env() ->
+                        "\" "
+                       ])},
+      {"ERL_EI_LIBDIR", lists:concat(["\"", erl_interface_dir(lib), "\""])},
+-     {"ERL_LDFLAGS"  , " -L$ERL_EI_LIBDIR -lerl_interface -lei"},
++     {"ERL_LDFLAGS"  , " -L$ERL_EI_LIBDIR -lei"},
+      {"ERLANG_ARCH"  , rebar_utils:wordsize()},
+      {"ERLANG_TARGET", rebar_utils:get_arch()},
+ 

dev-util/rebar/rebar-2.6.4-r1.ebuild

@@ -0,0 +1,30 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit bash-completion-r1
+
+DESCRIPTION="A sophisticated build-tool for Erlang projects that follows OTP principles"
+HOMEPAGE="https://github.com/rebar/rebar"
+SRC_URI="https://github.com/rebar/${PN}/archive/${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~ia64 ~ppc ~ppc64 ~sparc ~x86"
+IUSE=""
+
+RDEPEND="dev-lang/erlang:="
+DEPEND="${RDEPEND}"
+
+PATCHES=( "${FILESDIR}/rebar-erlang23.diff" )
+
+src_test() {
+	emake xref
+}
+
+src_install() {
+	dobin rebar
+	dodoc rebar.config.sample THANKS
+	dobashcomp priv/shell-completion/bash/${PN}
+}