dev-python/pypy3-exe: New split package, v7.3.0

Split the actual PyPy3 executable into a separate, slotted package
that is going to be pulled in by new dev-python/pypy3.

Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/pypy3-exe/Manifest

@@ -0,0 +1 @@
+DIST pypy3.6-v7.3.0-src.tar.bz2 21937786 BLAKE2B c53ac32a9cca1c4624160eae9f11b5705a59613f1e5100fbb0ee86118de5a7845b8fa5087165d7f5a077d20337dfca14a1c7eadbe768995e20e249ec271ac10d SHA512 313a4254262dd8d8b995a50bddbc360cfb67add0818e51a3e9ce25bda6a9b639e9fea8efe7da6adda76dff0a86a364544a13faa516e51b9ea6c25ec99223b435

dev-python/pypy3-exe/metadata.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="project">
+		<email>python@gentoo.org</email>
+		<name>Python</name>
+	</maintainer>
+	<use>
+		<flag name="low-memory">Build using PyPy with the engine configured towards low memory footprint.
+			This makes it possible to build PyPy using ~3.5G of RAM on amd64 and ~half of that on x86,
+			at the cost of lengthened build time.</flag>
+		<flag name="sandbox">Enable sandboxing functionality</flag>
+	</use>
+	<upstream>
+		<remote-id type="bitbucket">pypy/pypy</remote-id>
+	</upstream>
+</pkgmetadata>

dev-python/pypy3-exe/pypy3-exe-7.3.0.ebuild

@@ -0,0 +1,149 @@
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+# pypy3 needs to be built using python 2
+PYTHON_COMPAT=( python2_7 pypy )
+inherit check-reqs pax-utils python-any-r1 toolchain-funcs
+
+MY_P=pypy3.6-v${PV/_/}
+DESCRIPTION="PyPy3 executable (build from source)"
+HOMEPAGE="https://pypy.org/"
+SRC_URI="https://bitbucket.org/pypy/pypy/downloads/${MY_P}-src.tar.bz2"
+S="${WORKDIR}/${MY_P}-src"
+
+LICENSE="MIT"
+SLOT="${PV}"
+KEYWORDS="~amd64 ~x86 ~amd64-linux ~x86-linux"
+IUSE="bzip2 +jit low-memory ncurses sandbox cpu_flags_x86_sse2"
+
+RDEPEND=">=sys-libs/zlib-1.1.3:0=
+	virtual/libffi:0=
+	virtual/libintl:0=
+	dev-libs/expat:0=
+	bzip2? ( app-arch/bzip2:0= )
+	ncurses? ( sys-libs/ncurses:0= )
+	!dev-python/pypy3-exe-bin:${PV}"
+DEPEND="${RDEPEND}
+	low-memory? ( virtual/pypy )
+	!low-memory? (
+		|| (
+			virtual/pypy
+			(
+				dev-lang/python:2.7
+				dev-python/pycparser[python_targets_python2_7(-),python_single_target_python2_7(+)]
+			)
+		)
+	)"
+
+check_env() {
+	if use low-memory; then
+		CHECKREQS_MEMORY="1750M"
+		use amd64 && CHECKREQS_MEMORY="3500M"
+	else
+		CHECKREQS_MEMORY="3G"
+		use amd64 && CHECKREQS_MEMORY="6G"
+	fi
+
+	check-reqs_pkg_pretend
+}
+
+pkg_pretend() {
+	[[ ${MERGE_TYPE} != binary ]] && check_env
+}
+
+pkg_setup() {
+	if [[ ${MERGE_TYPE} != binary ]]; then
+		check_env
+
+		# unset to allow forcing pypy below :)
+		use low-memory && local EPYTHON=
+		if python_is_installed pypy && [[ ! ${EPYTHON} || ${EPYTHON} == pypy ]]; then
+			einfo "Using PyPy to perform the translation."
+			local EPYTHON=pypy
+		else
+			einfo "Using ${EPYTHON:-python2} to perform the translation. Please note that upstream"
+			einfo "recommends using PyPy for that. If you wish to do so, please install"
+			einfo "virtual/pypy and ensure that EPYTHON variable is unset."
+		fi
+
+		python-any-r1_pkg_setup
+	fi
+}
+
+src_configure() {
+	tc-export CC
+
+	local jit_backend
+	if use jit; then
+		jit_backend='--jit-backend='
+
+		# We only need the explicit sse2 switch for x86.
+		# On other arches we can rely on autodetection which uses
+		# compiler macros. Plus, --jit-backend= doesn't accept all
+		# the modern values...
+
+		if use x86; then
+			if use cpu_flags_x86_sse2; then
+				jit_backend+=x86
+			else
+				jit_backend+=x86-without-sse2
+			fi
+		else
+			jit_backend+=auto
+		fi
+	fi
+
+	local args=(
+		--no-shared
+		$(usex jit -Ojit -O2)
+		$(usex sandbox --sandbox '')
+
+		${jit_backend}
+
+		pypy/goal/targetpypystandalone
+	)
+
+	# Avoid linking against libraries disabled by use flags
+	local opts=(
+		bzip2:bz2
+		ncurses:_minimal_curses
+	)
+
+	local opt
+	for opt in "${opts[@]}"; do
+		local flag=${opt%:*}
+		local mod=${opt#*:}
+
+		args+=(
+			$(usex ${flag} --withmod --withoutmod)-${mod}
+		)
+	done
+
+	local interp=( "${PYTHON}" )
+	if use low-memory; then
+		interp=( env PYPY_GC_MAX_DELTA=200MB
+			"${PYTHON}" --jit loop_longevity=300 )
+	fi
+
+	# translate into the C sources
+	# we're going to make them ourselves since otherwise pypy does not
+	# free up the unneeded memory before spawning the compiler
+	set -- "${interp[@]}" rpython/bin/rpython --batch --source "${args[@]}"
+	echo -e "\033[1m${@}\033[0m"
+	"${@}" || die "translation failed"
+}
+
+src_compile() {
+	emake -C "${T}"/usession*-0/testing_1
+}
+
+src_install() {
+	local dest=/usr/lib/pypy3.6
+	exeinto "${dest}"
+	newexe "${T}"/usession*-0/testing_1/pypy3-c pypy3-c-${PV}
+	insinto "${dest}"/include/${PV}
+	doins include/pypy_*
+	pax-mark m "${ED}${dest}/pypy3-c-${PV}"
+}