media-video/pipewire: add 0.3.50-r2 to fix issues with weird CFLAGS

When using weird and unusual CFLAGS, PipeWire may end up failing to
link due to missing symbols. This commit backports a fix for that.

Bug: https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/2292
Signed-off-by: Niklāvs Koļesņikovs <89q1r14hd@relay.firefox.com>
Closes: https://github.com/gentoo/gentoo/pull/25145
Signed-off-by: Sam James <sam@gentoo.org>

2 files changed, 427 insertions, 0 deletions

diff --git a/media-video/pipewire/files/pipewire-0.3.50-treewide-retain-sections-to.patch b/media-video/pipewire/files/pipewire-0.3.50-treewide-retain-sections-to.patch
new file mode 100644
index 000000000000..1e1a8198ef26
--- /dev/null
+++ b/media-video/pipewire/files/pipewire-0.3.50-treewide-retain-sections-to.patch
@@ -0,0 +1,70 @@
+https://gitlab.freedesktop.org/pipewire/pipewire/-/commit/e28a052105f8ef35b3f469d3b85e1fcb25106f26
+
+From e28a052105f8ef35b3f469d3b85e1fcb25106f26 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Barnab=C3=A1s=20P=C5=91cze?= <pobrn@protonmail.com>
+Date: Wed, 13 Apr 2022 18:13:12 +0200
+Subject: [PATCH] treewide: retain sections to prevent linker garbage
+ collection
+
+The linker may remove sections that are actually used when
+"--gc-sections" and "-z start-stop-gc" is set. Add the `retain`
+attribute to prevent that.
+
+Furthermore, fix the alignment for `pwtest_suite_decl` objects.
+
+See: #2292
+See: https://lld.llvm.org/ELF/start-stop-gc.html
+See: https://github.com/systemd/systemd/issues/21847
+See: https://github.com/systemd/systemd/pull/21855
+---
+ src/modules/module-protocol-pulse/module.h | 1 +
+ test/pwtest-implementation.h               | 2 +-
+ test/pwtest.h                              | 6 ++++--
+ 3 files changed, 6 insertions(+), 3 deletions(-)
+
+diff --git a/src/modules/module-protocol-pulse/module.h b/src/modules/module-protocol-pulse/module.h
+index c1153640e..f75d8786c 100644
+--- a/src/modules/module-protocol-pulse/module.h
++++ b/src/modules/module-protocol-pulse/module.h
+@@ -47,6 +47,7 @@ struct module_info {
+ 
+ #define DEFINE_MODULE_INFO(name)					\
+ 	__attribute__((used))						\
++	__attribute__((retain))						\
+ 	__attribute__((section("pw_mod_pulse_modules")))		\
+ 	__attribute__((aligned(__alignof__(struct module_info))))	\
+ 	const struct module_info name
+diff --git a/test/pwtest-implementation.h b/test/pwtest-implementation.h
+index 7bfad01cf..1525d2056 100644
+--- a/test/pwtest-implementation.h
++++ b/test/pwtest-implementation.h
+@@ -131,7 +131,7 @@ void _pwtest_add(struct pwtest_context *ctx,
+ struct pwtest_suite_decl {
+ 	const char *name;
+ 	enum pwtest_result (*setup)(struct pwtest_context *, struct pwtest_suite *);
+-} __attribute__((aligned(16)));
++};
+ 
+ 
+ #endif /* PWTEST_IMPLEMENTATION_H */
+diff --git a/test/pwtest.h b/test/pwtest.h
+index 9c0737523..6d3070b79 100644
+--- a/test/pwtest.h
++++ b/test/pwtest.h
+@@ -494,9 +494,11 @@ enum pwtest_arg {
+  */
+ #define PWTEST_SUITE(cname) \
+ 	static enum pwtest_result (cname##__setup)(struct pwtest_context *ctx, struct pwtest_suite *suite); \
+-	static const struct pwtest_suite_decl _test_suite \
+ 	__attribute__((used)) \
+-	__attribute((section("pwtest_suite_section"))) = { \
++	__attribute__((retain)) \
++	__attribute__((section("pwtest_suite_section"))) \
++	__attribute__((aligned(__alignof__(struct pwtest_suite_decl)))) \
++	static const struct pwtest_suite_decl _test_suite = { \
+ 	   .name = #cname, \
+ 	   .setup = cname##__setup, \
+ 	}; \
+-- 
+GitLab
+
diff --git a/media-video/pipewire/pipewire-0.3.50-r2.ebuild b/media-video/pipewire/pipewire-0.3.50-r2.ebuild
new file mode 100644
index 000000000000..19259baf68c8
--- /dev/null
+++ b/media-video/pipewire/pipewire-0.3.50-r2.ebuild
@@ -0,0 +1,357 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{8..10} )
+
+inherit flag-o-matic meson-multilib optfeature prefix python-any-r1 systemd udev
+
+if [[ ${PV} == 9999 ]]; then
+	EGIT_REPO_URI="https://gitlab.freedesktop.org/${PN}/${PN}.git"
+	inherit git-r3
+else
+	if [[ ${PV} == *_p* ]] ; then
+		MY_COMMIT=""
+		SRC_URI="https://gitlab.freedesktop.org/pipewire/pipewire/-/archive/${MY_COMMIT}/pipewire-${MY_COMMIT}.tar.bz2 -> ${P}.tar.bz2"
+		S="${WORKDIR}"/${PN}-${MY_COMMIT}
+	else
+		SRC_URI="https://gitlab.freedesktop.org/${PN}/${PN}/-/archive/${PV}/${P}.tar.gz"
+	fi
+
+	KEYWORDS="~amd64 ~arm ~arm64 ~ppc ~ppc64 ~riscv ~sparc ~x86"
+fi
+
+DESCRIPTION="Multimedia processing graphs"
+HOMEPAGE="https://pipewire.org/"
+
+LICENSE="MIT LGPL-2.1+ GPL-2"
+# ABI was broken in 0.3.42 for https://gitlab.freedesktop.org/pipewire/wireplumber/-/issues/49
+SLOT="0/0.4"
+IUSE="bluetooth doc echo-cancel extra gstreamer jack-client jack-sdk lv2 pipewire-alsa ssl system-service systemd test v4l X zeroconf"
+
+# Once replacing system JACK libraries is possible, it's likely that
+# jack-client IUSE will need blocking to avoid users accidentally
+# configuring their systems to send PW sink output to the emulated
+# JACK's sink - doing so is likely to yield no audio, cause a CPU
+# cycles consuming loop (and may even cause GUI crashes)!
+
+REQUIRED_USE="
+	jack-sdk? ( !jack-client )
+	system-service? ( systemd )
+"
+
+RESTRICT="!test? ( test )"
+
+BDEPEND="
+	>=dev-util/meson-0.59
+	virtual/pkgconfig
+	${PYTHON_DEPS}
+	$(python_gen_any_dep 'dev-python/docutils[${PYTHON_USEDEP}]')
+	doc? (
+		app-doc/doxygen
+		media-gfx/graphviz
+	)
+"
+RDEPEND="
+	acct-group/audio
+	media-libs/alsa-lib
+	sys-apps/dbus[${MULTILIB_USEDEP}]
+	sys-libs/readline:=
+	sys-libs/ncurses:=[unicode(+)]
+	virtual/libintl[${MULTILIB_USEDEP}]
+	virtual/libudev[${MULTILIB_USEDEP}]
+	bluetooth? (
+		media-libs/fdk-aac
+		media-libs/libldac
+		media-libs/libfreeaptx
+		media-libs/sbc
+		>=net-wireless/bluez-4.101:=
+		virtual/libusb:1
+	)
+	echo-cancel? ( media-libs/webrtc-audio-processing:0 )
+	extra? (
+		>=media-libs/libsndfile-1.0.20
+	)
+	gstreamer? (
+		>=dev-libs/glib-2.32.0:2
+		>=media-libs/gstreamer-1.10.0:1.0
+		media-libs/gst-plugins-base:1.0
+	)
+	jack-client? ( >=media-sound/jack2-1.9.10:2[dbus] )
+	jack-sdk? (
+		!media-sound/jack-audio-connection-kit
+		!media-sound/jack2
+	)
+	lv2? ( media-libs/lilv )
+	pipewire-alsa? (
+		>=media-libs/alsa-lib-1.1.7[${MULTILIB_USEDEP}]
+		!media-plugins/alsa-plugins[${MULTILIB_USEDEP},pulseaudio]
+	)
+	!pipewire-alsa? ( media-plugins/alsa-plugins[${MULTILIB_USEDEP},pulseaudio] )
+	ssl? ( dev-libs/openssl:= )
+	systemd? ( sys-apps/systemd )
+	system-service? (
+		acct-user/pipewire
+		acct-group/pipewire
+	)
+	v4l? ( media-libs/libv4l )
+	X? (
+		media-libs/libcanberra
+		x11-libs/libX11
+		x11-libs/libXfixes
+	)
+	zeroconf? ( net-dns/avahi )
+"
+
+DEPEND="${RDEPEND}"
+
+# TODO: Consider use cases where pipewire is not used for driving audio
+# Doing so with WirePlumber currently involves editing Lua scripts
+PDEPEND=">=media-video/wireplumber-0.4.8-r3"
+
+# Present RDEPEND that are currently always disabled due to the PW
+# code using them being required to be disabled by Gentoo guidelines
+# (i.e. developer binaries not meant for users) and unready code
+#	media-video/ffmpeg:=
+#	media-libs/libsdl2
+#	>=media-libs/vulkan-loader-1.1.69
+#
+# Ditto for DEPEND
+#	>=dev-util/vulkan-headers-1.1.69
+
+DOCS=( {README,INSTALL}.md NEWS )
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-0.3.25-enable-failed-mlock-warning.patch
+	"${FILESDIR}"/${P}-fix-spa-header.patch
+	"${FILESDIR}"/${P}-treewide-retain-sections-to.patch
+)
+
+# limitsdfile related code taken from =sys-auth/realtime-base-0.1
+# with changes as necessary.
+limitsdfile=40-${PN}.conf
+
+python_check_deps() {
+	has_version -b "dev-python/docutils[${PYTHON_USEDEP}]"
+}
+
+src_prepare() {
+	default
+
+	einfo "Generating ${limitsdfile}"
+	cat > ${limitsdfile} <<- EOF || die
+		# Start of ${limitsdfile} from ${P}
+
+		@audio	-	memlock 256
+
+		$(use system-service && {
+			echo @pipewire - rtprio 95
+			echo @pipewire - priority -19
+			echo @pipewire - memlock 4194304
+		})
+
+		# End of ${limitsdfile} from ${P}
+	EOF
+}
+
+multilib_src_configure() {
+	# https://bugs.gentoo.org/838301
+	filter-flags -fno-semantic-interposition
+
+	local emesonargs=(
+		-Ddocdir="${EPREFIX}"/usr/share/doc/${PF}
+
+		$(meson_native_use_feature zeroconf avahi)
+		$(meson_native_use_feature doc docs)
+		$(meson_native_enabled examples) # TODO: Figure out if this is still important now that media-session gone
+		$(meson_native_enabled man)
+		$(meson_feature test tests)
+		-Dinstalled_tests=disabled # Matches upstream; Gentoo never installs tests
+		$(meson_native_use_feature gstreamer)
+		$(meson_native_use_feature gstreamer gstreamer-device-provider)
+		$(meson_native_use_feature systemd)
+
+		$(meson_native_use_feature system-service systemd-system-service)
+		-Dsystemd-system-unit-dir="$(systemd_get_systemunitdir)"
+		-Dsystemd-user-unit-dir="$(systemd_get_userunitdir)"
+
+		$(meson_native_use_feature systemd systemd-user-service)
+		$(meson_feature pipewire-alsa) # Allows integrating ALSA apps into PW graph
+		-Dspa-plugins=enabled
+		-Dalsa=enabled # Allows using kernel ALSA for sound I/O (NOTE: media-session is gone so IUSE=alsa/spa_alsa/alsa-backend might be possible)
+		-Daudiomixer=enabled # Matches upstream
+		-Daudioconvert=enabled # Matches upstream
+		$(meson_native_use_feature bluetooth bluez5)
+		$(meson_native_use_feature bluetooth bluez5-backend-hsp-native)
+		$(meson_native_use_feature bluetooth bluez5-backend-hfp-native)
+		$(meson_native_use_feature bluetooth bluez5-backend-ofono)
+		$(meson_native_use_feature bluetooth bluez5-backend-hsphfpd)
+		$(meson_native_use_feature bluetooth bluez5-codec-aac)
+		$(meson_native_use_feature bluetooth bluez5-codec-aptx)
+		$(meson_native_use_feature bluetooth bluez5-codec-ldac)
+		$(meson_native_use_feature bluetooth libusb) # At least for now only used by bluez5 native (quirk detection of adapters)
+		$(meson_native_use_feature echo-cancel echo-cancel-webrtc) #807889
+		-Dcontrol=enabled # Matches upstream
+		-Daudiotestsrc=enabled # Matches upstream
+		-Dffmpeg=disabled # Disabled by upstream and no major developments to spa/plugins/ffmpeg/ since May 2020
+		-Dpipewire-jack=enabled # Allows integrating JACK apps into PW graph
+		$(meson_native_use_feature jack-client jack) # Allows PW to act as a JACK client
+		$(meson_use jack-sdk jack-devel)
+		$(usex jack-sdk "-Dlibjack-path=${EPREFIX}/usr/$(get_libdir)" '')
+		-Dsupport=enabled # Miscellaneous/common plugins, such as null sink
+		-Devl=disabled # Matches upstream
+		-Dtest=disabled # fakesink and fakesource plugins
+		$(meson_native_use_feature lv2)
+		$(meson_native_use_feature v4l v4l2)
+		-Dlibcamera=disabled # libcamera is not in Portage tree
+		$(meson_native_use_feature ssl raop)
+		-Dvideoconvert=enabled # Matches upstream
+		-Dvideotestsrc=enabled # Matches upstream
+		-Dvolume=enabled # Matches upstream
+		-Dvulkan=disabled # Uses pre-compiled Vulkan compute shader to provide a CGI video source (dev thing; disabled by upstream)
+		$(meson_native_use_feature extra pw-cat)
+		-Dudev=enabled
+		-Dudevrulesdir="${EPREFIX}$(get_udevdir)/rules.d"
+		-Dsdl2=disabled # Controls SDL2 dependent code (currently only examples when -Dinstalled_tests=enabled which we never install)
+		$(meson_native_use_feature extra sndfile) # Enables libsndfile dependent code (currently only pw-cat)
+		-Dsession-managers="[]" # All available session managers are now their own projects, so there's nothing to build
+
+		# Just for bell sounds in X11 right now.
+		$(meson_native_use_feature X x11)
+		$(meson_native_use_feature X x11-xfixes)
+		$(meson_native_use_feature X libcanberra)
+	)
+
+	meson_src_configure
+}
+
+multilib_src_install() {
+	# Our custom DOCS do not exist in multilib source directory
+	DOCS= meson_src_install
+}
+
+multilib_src_install_all() {
+	einstalldocs
+
+	insinto /etc/security/limits.d
+	doins ${limitsdfile}
+
+	if use pipewire-alsa; then
+		dodir /etc/alsa/conf.d
+		# These will break if someone has /etc that is a symbolic link to a subfolder! See #724222
+		# And the current dosym8 -r implementation is likely affected by the same issue, too.
+		dosym ../../../usr/share/alsa/alsa.conf.d/50-pipewire.conf /etc/alsa/conf.d/50-pipewire.conf
+		dosym ../../../usr/share/alsa/alsa.conf.d/99-pipewire-default.conf /etc/alsa/conf.d/99-pipewire-default.conf
+	fi
+
+	if ! use systemd; then
+		insinto /etc/xdg/autostart
+		newins "${FILESDIR}"/pipewire.desktop-r1 pipewire.desktop
+
+		exeinto /usr/bin
+		newexe "${FILESDIR}"/gentoo-pipewire-launcher.in gentoo-pipewire-launcher
+		eprefixify "${ED}"/usr/bin/gentoo-pipewire-launcher
+	fi
+}
+
+pkg_postinst() {
+	elog "It is recommended to raise RLIMIT_MEMLOCK to 256 for users"
+	elog "using PipeWire. Do it either manually or add yourself"
+	elog "to the 'audio' group:"
+	elog
+	elog "  usermod -aG audio <youruser>"
+	elog
+
+	if ! use jack-sdk; then
+		elog "JACK emulation is incomplete and not all programs will work. PipeWire's"
+		elog "alternative libraries have been installed to a non-default location."
+		elog "To use them, put pw-jack <application> before every JACK application."
+		elog "When using pw-jack, do not run jackd/jackdbus. However, a virtual/jack"
+		elog "provider is still needed to compile the JACK applications themselves."
+		elog
+	fi
+
+	if use systemd; then
+		elog "When switching from PulseAudio, you may need to disable PulseAudio:"
+		elog
+		elog "  systemctl --user disable pulseaudio.service pulseaudio.socket"
+		elog
+		elog "To use PipeWire, the user units must be manually enabled"
+		elog "by running this command as each user you use for desktop activities:"
+		elog
+		elog "  systemctl --user enable pipewire.socket pipewire-pulse.socket"
+		elog
+		elog "A reboot is recommended to avoid interferences from still running"
+		elog "PulseAudio daemon."
+		elog
+		elog "Both new users and those upgrading need to enable WirePlumber"
+		elog "for relevant users:"
+		elog
+		elog "  systemctl --user disable pipewire-media-session.service"
+		elog "  systemctl --user --force enable wireplumber.service"
+		elog
+		elog "Root user may replace --user with --global to change system default"
+		elog "configuration for all of the above commands."
+	else
+		ewarn "PipeWire daemon startup has been moved to a launcher script!"
+		ewarn "Make sure that ${EROOT}/etc/pipewire/pipewire.conf either does not exist or no"
+		ewarn "longer is set to start a session manager or PulseAudio compatibility daemon (all"
+		ewarn "lines similar to '{ path = /usr/bin/pipewire*' should be commented out)"
+		ewarn
+		ewarn "Those manually starting /usr/bin/pipewire via .xinitrc or similar _must_ from"
+		ewarn "now on start ${EROOT}/usr/bin/gentoo-pipewire-launcher instead! It is highly"
+		ewarn "advised that a D-Bus user session is set up before starting the script."
+		ewarn
+		if has_version 'media-sound/pulseaudio[daemon]' || has_version 'media-sound/pulseaudio-daemon'; then
+			elog "This ebuild auto-enables PulseAudio replacement. Because of that, users"
+			elog "are recommended to edit: ${EROOT}/etc/pulse/client.conf and disable"
+			elog "autospawning of the original daemon by setting:"
+			elog
+			elog "  autospawn = no"
+			elog
+			elog "Please note that the semicolon (;) must _NOT_ be at the beginning of the line!"
+			elog
+			elog "Alternatively, if replacing PulseAudio daemon is not desired, edit"
+			elog "${EROOT}/usr/bin/gentoo-pipewire-launcher by commenting out the relevant"
+			elog "command:"
+			elog
+			elog "#${EROOT}/usr/bin/pipewire -c pipewire-pulse.conf &"
+			elog
+		fi
+		elog "NOTE:"
+		elog "Starting with PipeWire-0.3.30, this package is no longer installing its config"
+		elog "into ${EROOT}/etc/pipewire by default. In case you need to change"
+		elog "its config, please start by copying default config from ${EROOT}/usr/share/pipewire"
+		elog "and just override the sections you want to change."
+	fi
+	elog
+
+	elog "For latest tips and tricks, troubleshooting information and documentation"
+	elog "in general, please refer to https://wiki.gentoo.org/wiki/PipeWire"
+	elog
+
+	optfeature_header "The following can be installed for optional runtime features:"
+	optfeature "restricted realtime capabilities via D-Bus" sys-auth/rtkit
+
+	if has_version 'net-misc/ofono' ; then
+		ewarn "Native backend has become default. Please disable oFono via:"
+		if systemd_is_booted ; then
+			ewarn "systemctl disable ofono"
+		else
+			ewarn "rc-update delete ofono"
+		fi
+		ewarn
+	fi
+
+	if use system-service; then
+		ewarn
+		ewarn "WARNING: you have enabled the system-service USE flag, which installs"
+		ewarn "the system-wide systemd units that enable PipeWire to run as a system"
+		ewarn "service. This is more than likely NOT what you want. You are strongly"
+		ewarn "advised not to enable this mode and instead stick with systemd user"
+		ewarn "units. The default configuration files will likely not work out of"
+		ewarn "box, and you are on your own with configuration."
+		ewarn
+	fi
+}