dev-util/unicorn: Use python2 and fixes

r4 failed to build with:
ERROR: Cannot use 'python', Python 2.4 or later is required.
       Note that Python 3 or later is not yet supported.
       Use --python=/path/to/python to specify a supported Python.
Fixes: make.sh in src_compile() did not forward those variables

dev-util/unicorn/unicorn-1.0.1-r5.ebuild

@@ -0,0 +1,57 @@
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+PYTHON_COMPAT=( python2_7 )
+inherit multilib distutils-r1
+
+DESCRIPTION="A lightweight multi-platform, multi-architecture CPU emulator framework"
+HOMEPAGE="http://www.unicorn-engine.org"
+SRC_URI="https://github.com/unicorn-engine/unicorn/archive/${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64 ~x86 ~m68k ~arm ~arm64 ~mips ~sparc"
+IUSE="python static-libs"
+
+IUSE_UNICORN_TARGETS="x86 m68k arm aarch64 mips sparc"
+use_unicorn_targets=$(printf ' unicorn_targets_%s' ${IUSE_UNICORN_TARGETS})
+IUSE+=" ${use_unicorn_targets}"
+
+DEPEND="dev-libs/glib:2
+	${PYTHON_DEPS}"
+RDEPEND="${DEPEND}
+	virtual/pkgconfig"
+PDEPEND="dev-libs/unicorn-bindings[python?]"
+
+REQUIRED_USE="|| ( ${use_unicorn_targets} )"
+
+src_configure(){
+	local target
+	unicorn_softmmu_targets=""
+
+	for target in ${IUSE_UNICORN_TARGETS} ; do
+		if use "unicorn_targets_${target}"; then
+			unicorn_targets+="${target} "
+		fi
+	done
+
+	#the following variable is getting recreated using UNICORN_ARCHS below
+	UNICORN_TARGETS=""
+	default
+}
+
+src_compile() {
+	export CC INSTALL_BIN PREFIX PKGCFGDIR LIBDIRARCH LIBARCHS CFLAGS LDFLAGS
+	UNICORN_QEMU_FLAGS="--python=/usr/bin/python2" \
+		UNICORN_ARCHS="${unicorn_targets}" \
+		UNICORN_STATIC="$(use static-libs && echo yes || echo no)" \
+		emake
+	# echo $PWD
+	# UNICORN_QEMU_FLAGS="--python=/usr/bin/python2" UNICORN_ARCHS="${unicorn_targets}" UNICORN_STATIC="$(use static-libs && echo yes || echo no)" ./make.sh --python=/usr/bin/python2
+}
+
+src_install() {
+	emake DESTDIR="${D}" LIBDIR="/usr/$(get_libdir)" UNICORN_STATIC="$(use static-libs && echo yes || echo no)" install
+}