From 2c862d1f086bb8a9ce70631dfce1f2d7b5676b4c Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Wed, 17 Nov 2021 10:05:45 +0000
Subject: dev-lang/python: add PGO

Closes: https://bugs.gentoo.org/615412
Closes: https://github.com/gentoo/gentoo/pull/20077
Signed-off-by: Sam James <sam@gentoo.org>
---
 dev-lang/python/metadata.xml                |  1 +
 dev-lang/python/python-3.11.0_alpha2.ebuild | 17 ++++++++++++++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

(limited to 'dev-lang')

diff --git a/dev-lang/python/metadata.xml b/dev-lang/python/metadata.xml
index 3427feb17c7d..996b563e4b05 100644
--- a/dev-lang/python/metadata.xml
+++ b/dev-lang/python/metadata.xml
@@ -7,6 +7,7 @@
 </maintainer>
 <use>
 	<flag name="bluetooth">Build Bluetooth protocol support in socket module</flag>
+	<flag name="pgo">Optimize the build using Profile Guided Optimization (PGO)</flag>
 	<flag name="wininst">Install Windows executables required to create an executable installer for MS Windows.</flag>
 </use>
 </pkgmetadata>
diff --git a/dev-lang/python/python-3.11.0_alpha2.ebuild b/dev-lang/python/python-3.11.0_alpha2.ebuild
index e97de8d4ccec..30e34160ff57 100644
--- a/dev-lang/python/python-3.11.0_alpha2.ebuild
+++ b/dev-lang/python/python-3.11.0_alpha2.ebuild
@@ -25,7 +25,7 @@ S="${WORKDIR}/${MY_P}"
 LICENSE="PSF-2"
 SLOT="${PYVER}"
 KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86"
-IUSE="bluetooth build examples gdbm hardened +ncurses +readline +sqlite +ssl test tk wininst +xml"
+IUSE="bluetooth build examples gdbm hardened +ncurses pgo +readline +sqlite +ssl test tk wininst +xml"
 RESTRICT="!test? ( test )"
 
 # Do not add a dependency on dev-lang/python to this ebuild.
@@ -161,6 +161,11 @@ src_configure() {
 		dbmliborder+="${dbmliborder:+:}gdbm"
 	fi
 
+	if use pgo; then
+		local jobs=$(makeopts_jobs "${MAKEOPTS}" "$(get_nproc)")
+		export PROFILE_TASK="-m test -j${jobs} --pgo-extended -x test_gdb"
+	fi
+
 	local myeconfargs=(
 		# glibc-2.30 removes it; since we can't cleanly force-rebuild
 		# Python on glibc upgrade, remove it proactively to give
@@ -179,6 +184,8 @@ src_configure() {
 		--without-ensurepip
 		--with-system-expat
 		--with-system-ffi
+
+		$(use_enable pgo optimizations)
 	)
 
 	OPT="" econf "${myeconfargs[@]}"
@@ -198,6 +205,14 @@ src_compile() {
 	# https://bugs.gentoo.org/823728
 	export SETUPTOOLS_USE_DISTUTILS=stdlib
 
+	if use pgo ; then
+		# bug 660358
+		local -x COLUMNS=80
+		local -x PYTHONDONTWRITEBYTECODE=
+
+		addpredict /usr/lib/python3.11/site-packages
+	fi
+
 	emake CPPFLAGS= CFLAGS= LDFLAGS=
 
 	# Work around bug 329499. See also bug 413751 and 457194.
-- 
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