dev-python/pillow: Fix cross-compiling (again)

Upstream isn't merging my patch in a hurry so apply here.

Signed-off-by: James Le Cuirot <[email protected]>

dev-python/pillow/files/pillow-10.2.0-cross.patch

@@ -0,0 +1,62 @@
+From 774d7a570d9f76903de3c3267512b8a7d252c21e Mon Sep 17 00:00:00 2001
+From: James Le Cuirot <[email protected]>
+Date: Fri, 22 Dec 2023 22:38:27 +0000
+Subject: [PATCH] Fix cross-compiling by searching the right lib and include
+ directories
+
+We were previously searching the `{sys.prefix}/lib` and
+`{sys.prefix}/include` directories unconditionally. This is problematic
+when cross-compiling, as it does not take account of any sysroot where
+alternative libraries and headers are located. Adding `-I/usr/include`
+causes the build to explode, at least when cross-compiling from 64-bit
+to 32-bit.
+
+Python does not officially support cross-compiling, but Gentoo achieves
+this by modifying the sysconfig variables like `LIBDIR` and `INCLUDEDIR`
+with great results.
+
+Assuming "lib" is bad. 64-bit Linux systems often use lib64, putting
+32-bit libraries under lib. You cannot assume that either though, as
+pure 64-bit Linux systems may just use lib instead. Things get even
+stranger on RISC-V.
+
+The value of `sys.prefix` changes when using a virtualenv. Dependencies
+may be installed here, so it does make sense to continue supporting this
+case, even if it is incompatible with cross-compiling. Unlike regular
+environments, "lib" is generally used for libraries, although a lib64
+symlink may also be present.
+---
+ setup.py | 13 +++++++++++--
+ 1 file changed, 11 insertions(+), 2 deletions(-)
+
+diff --git a/setup.py b/setup.py
+index 1bf0bcff558..07163d001fc 100755
+--- a/setup.py
++++ b/setup.py
+@@ -15,6 +15,7 @@
+ import struct
+ import subprocess
+ import sys
++import sysconfig
+ import warnings
+
+ from setuptools import Extension, setup
+@@ -504,8 +505,16 @@ def build_extensions(self):
+                 for d in os.environ[k].split(os.path.pathsep):
+                     _add_directory(library_dirs, d)
+
+-        _add_directory(library_dirs, os.path.join(sys.prefix, "lib"))
+-        _add_directory(include_dirs, os.path.join(sys.prefix, "include"))
++        _add_directory(
++            library_dirs,
++            (sys.prefix == sys.base_prefix and sysconfig.get_config_var("LIBDIR"))
++            or os.path.join(sys.prefix, "lib"),
++        )
++        _add_directory(
++            include_dirs,
++            (sys.prefix == sys.base_prefix and sysconfig.get_config_var("INCLUDEDIR"))
++            or os.path.join(sys.prefix, "include"),
++        )
+
+         #
+         # add platform directories

dev-python/pillow/pillow-10.2.0-r1.ebuild

@@ -0,0 +1,131 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+DISTUTILS_EXT=1
+# setuptools wrapper
+DISTUTILS_USE_PEP517=standalone
+PYTHON_COMPAT=( python3_{10..12} pypy3 )
+PYTHON_REQ_USE='tk?,threads(+)'
+
+inherit distutils-r1 toolchain-funcs virtualx
+
+MY_PN=Pillow
+MY_P=${MY_PN}-${PV}
+
+DESCRIPTION="Python Imaging Library (fork)"
+HOMEPAGE="
+	https://python-pillow.org/
+	https://github.com/python-pillow/Pillow/
+	https://pypi.org/project/pillow/
+"
+SRC_URI="
+	https://github.com/python-pillow/Pillow/archive/${PV}.tar.gz
+		-> ${P}.gh.tar.gz
+"
+S="${WORKDIR}/${MY_P}"
+
+LICENSE="HPND"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~loong ~m68k ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~arm64-macos ~x64-macos"
+IUSE="examples imagequant +jpeg jpeg2k lcms test tiff tk truetype webp xcb zlib"
+REQUIRED_USE="test? ( jpeg jpeg2k lcms tiff truetype )"
+RESTRICT="!test? ( test )"
+
+DEPEND="
+	imagequant? ( media-gfx/libimagequant:= )
+	jpeg? ( media-libs/libjpeg-turbo:= )
+	jpeg2k? ( media-libs/openjpeg:2= )
+	lcms? ( media-libs/lcms:2= )
+	tiff? ( media-libs/tiff:=[jpeg,zlib] )
+	truetype? ( media-libs/freetype:2= )
+	webp? ( media-libs/libwebp:= )
+	xcb? ( x11-libs/libxcb )
+	zlib? ( sys-libs/zlib:= )
+"
+RDEPEND="
+	${DEPEND}
+	dev-python/olefile[${PYTHON_USEDEP}]
+"
+BDEPEND="
+	dev-python/setuptools[${PYTHON_USEDEP}]
+	dev-python/wheel[${PYTHON_USEDEP}]
+	virtual/pkgconfig
+	test? (
+		${RDEPEND}
+		dev-python/defusedxml[${PYTHON_USEDEP}]
+		dev-python/packaging[${PYTHON_USEDEP}]
+		dev-python/pytest[${PYTHON_USEDEP}]
+		dev-python/pytest-timeout[${PYTHON_USEDEP}]
+		|| (
+			media-gfx/imagemagick[png]
+			media-gfx/graphicsmagick[png]
+		)
+	)
+"
+
+EPYTEST_DESELECT=(
+	# TODO; incompatible Qt version?
+	Tests/test_qt_image_qapplication.py::test_sanity
+)
+
+PATCHES=(
+	# https://github.com/python-pillow/pillow/pull/7634
+	"${FILESDIR}/${P}-cross.patch"
+)
+
+usepil() {
+	usex "${1}" enable disable
+}
+
+python_configure_all() {
+	# It's important that these flags are also passed during the install phase
+	# as well. Make sure of that if you change the lines below. See bug 661308.
+	cat >> setup.cfg <<-EOF || die
+		[build_ext]
+		disable_platform_guessing = True
+		$(usepil truetype)_freetype = True
+		$(usepil jpeg)_jpeg = True
+		$(usepil jpeg2k)_jpeg2000 = True
+		$(usepil lcms)_lcms = True
+		$(usepil tiff)_tiff = True
+		$(usepil imagequant)_imagequant = True
+		$(usepil webp)_webp = True
+		$(usepil webp)_webpmux = True
+		$(usepil xcb)_xcb = True
+		$(usepil zlib)_zlib = True
+	EOF
+
+	# We have patched in this env var.
+	tc-export PKG_CONFIG
+}
+
+src_test() {
+	virtx distutils-r1_src_test
+}
+
+python_test() {
+	local EPYTEST_DESELECT=(
+		# TODO (is clipboard unreliable in Xvfb?)
+		Tests/test_imagegrab.py::TestImageGrab::test_grabclipboard
+	)
+
+	"${EPYTHON}" selftest.py --installed || die "selftest failed with ${EPYTHON}"
+	# no:relaxed: pytest-relaxed plugin make our tests fail. deactivate if installed
+	epytest -p no:relaxed || die "Tests failed with ${EPYTHON}"
+}
+
+python_install() {
+	python_doheader src/libImaging/*.h
+	distutils-r1_python_install
+}
+
+python_install_all() {
+	if use examples ; then
+		docinto example
+		dodoc docs/example/*
+		docompress -x /usr/share/doc/${PF}/example
+	fi
+	distutils-r1_python_install_all
+}