try first ebuild for trbase

+# ChangeLog for dev-libs/trbase
+# Copyright 1999-2015 Georg Hopp; Distributed under the GPL v3
+
+*libtrbase-1.0.2 (11 Apr 2016)
+
+  11 Apr 2016; Georg Hopp <georg@steffers.org> metadata.xml,
+  libtrbase-1.0.2.ebuild :
+    Initial import.

+# Copyright 1999-2016 Georg Hopp
+# Distributed under the terms of the GNU General Public License v3
+
+EAPI=6
+
+inherit eutils
+
+DESCRIPTION="The taskrambler framewark base class."
+HOMEPAGE="https://gitlab.weird-web-workers.org/taskrambler/trbase"
+SRC_URI="http://ci_build.weird-web-workers.org/trbase/artifacts/${P}.tar.gz"
+LICENSE="GPL-3+"
+
+SLOT="1.0"
+
+KEYWORDS="amd64 ~x86"
+
+IUSE="memopt"
+
+DEPEND=""
+RDEPEND="${DEPEND}"

+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+<maintainer type="person">
+	<email>georg@steffers.org</email>
+	<description>Author and primary maintainer</description>
+</maintainer>
+<longdescription>
+	The very basic library for the taskrambler framework. This provides
+	a class system for C applications as well as some support code.
+</longdescription>
+</pkgmetadata>

+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<!--
+# $Id$
+
+This is the example metadata file.
+The root element of this file is <pkgmetadata>. Within this element a
+number of subelements are allowed, the most common being maintainer.
+
+For a full description look at:
+https://devmanual.gentoo.org/ebuild-writing/misc-files/metadata/
+
+Before committing, please remove the comments from this file. They are
+not relevant for general metadata.xml files.
+-->
+<pkgmetadata>
+<maintainer type="person">
+	<email>exampledev@gentoo.org</email>
+	<description>Primary maintainer</description>
+</maintainer>
+<maintainer type="project">
+	<email>exampleproject@gentoo.org</email>
+	<name>Gentoo Example Project</name>
+</maintainer>
+<longdescription>Long description of the package</longdescription>
+<use>
+	<flag name="aspell">Uses <pkg>app-text/aspell</pkg> for spell checking.
+		Requires an installed dictionary from <cat>app-dicts</cat></flag>
+	<flag name="flag">Description of how USE='flag' affects this package</flag>
+	<flag name="userland_GNU">Description of how USERLAND='GNU' affects this
+		package</flag>
+</use>
+</pkgmetadata>