dev-libs/protobuf: Sync with Gentoo

It's from Gentoo commit 7bb0d63fcdf544cbe9e490e96e19a78060a4abba.

sdk_container/src/third_party/portage-stable/dev-libs/protobuf/Manifest

@@ -15,3 +15,4 @@ DIST protobuf-27.5.tar.gz 9153935 BLAKE2B 08b1b5927188e68ef2ae8ce8cdc6f21c34ee84
 DIST protobuf-28.0.tar.gz 9259114 BLAKE2B 328e09ebffb296d838557ea72a4fc4da8e0ad5f1edfccebcc8ee7c9e0e74d06e5e6dbad741fd89f6a4502c1cb246a973fd60c035ccdbf89700b7baff49e2a65e SHA512 8745f625ac781f3bbefe9494cbf570143d38aecc1521edef7a52ffb403b8be24df2c71f4f2410b5a5b78a0f3e8a38a7d19be2cf916b1b9125349d2da18262cd1
 DIST protobuf-28.3.tar.gz 9256608 BLAKE2B 05162124676abe18300481e9f985fd2cfb09b052d06670a993e79ef02f3daf0d5380b521977ebc2362d4094486151ea285fe1c98a1d2f3799b18a1fa422fdc13 SHA512 a91e175fed7eb01c4240842a5af73a7d3cefccbb10885434bceeb7bc89ab6c56a74912cee290bf46e81d4026f3c9c2b10faad5545816064e215c4bae7908263d
 DIST protobuf-29.2.tar.gz 9348408 BLAKE2B 847798474bc6a76b9badfdbf605e118dece5e321e81242d7fa1bf5f5d17ee05a3d365ec112dc6d861cade97efff8be1d5d04006a5144f613bdb3ff5eacc63b99 SHA512 aeb21773edc3dd92a6c1ba6ccd721cc8a20d61230a5309c75ee3ef19baa554c228a6d1095f191ccc18f10183b646f3140dfe6526f5812bcaa64b7d5260572643
+DIST protobuf-29.4.tar.gz 9350942 BLAKE2B fd3b81905e26db2ec3b54eaf30cf250db2894f91d5da73130106f6778f4e2f13b690961eecb8f5b8c23ac72428753611cd9bf719da986083e09ab32160e25314 SHA512 c888cb9961d58b7fb11a3363ff4d2684605cdd79756712f407ffe5f275569bf69b4370f1d2a0e20775646745cddd41a9b510f1c1981be4e969c9acf0dc2ba734

sdk_container/src/third_party/portage-stable/dev-libs/protobuf/protobuf-29.4.ebuild

@@ -0,0 +1,177 @@
+# Copyright 2008-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit cmake-multilib elisp-common multilib
+
+# NOTE from https://github.com/protocolbuffers/protobuf/blob/main/.gitmodules
+ABSEIL_BRANCH="lts_2023_08_02"
+
+ABSEIL_MIN_VER="${ABSEIL_BRANCH//lts_}"
+ABSEIL_MIN_VER="${ABSEIL_MIN_VER//_/}"
+
+if [[ "${PV}" == *9999 ]]; then
+	EGIT_REPO_URI="https://github.com/protocolbuffers/protobuf.git"
+	EGIT_SUBMODULES=( '-*' )
+	MY_SLOT="28.0"
+
+	inherit git-r3
+else
+	SRC_URI="https://github.com/protocolbuffers/protobuf/releases/download/v${PV}/${P}.tar.gz"
+	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~mips ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~arm64-macos ~x64-macos"
+	MY_SLOT=$(ver_cut 1-2)
+fi
+
+DESCRIPTION="Google's Protocol Buffers - Extensible mechanism for serializing structured data"
+HOMEPAGE="https://protobuf.dev/"
+
+LICENSE="BSD"
+SLOT="0/${MY_SLOT}.0"
+IUSE="conformance debug emacs examples +libprotoc libupb +protobuf +protoc test zlib"
+
+# Require protobuf for the time being
+REQUIRED_USE="
+	protobuf
+	examples? ( protobuf protoc )
+	libprotoc? ( protobuf )
+	libupb? (	protobuf )
+	protoc? ( protobuf )
+"
+
+RESTRICT="!test? ( test )"
+
+BDEPEND="
+	emacs? ( app-editors/emacs:* )
+"
+
+COMMON_DEPEND="
+	>=dev-cpp/abseil-cpp-${ABSEIL_MIN_VER}:=[${MULTILIB_USEDEP}]
+	zlib? ( sys-libs/zlib[${MULTILIB_USEDEP}] )
+"
+
+DEPEND="
+	${COMMON_DEPEND}
+	conformance? ( dev-libs/jsoncpp[${MULTILIB_USEDEP}] )
+	test? ( >=dev-cpp/gtest-1.11[${MULTILIB_USEDEP}] )
+"
+RDEPEND="
+	${COMMON_DEPEND}
+	${BDEPEND}
+"
+
+PATCHES=(
+	"${FILESDIR}/${PN}-23.3-static_assert-failure.patch"
+	"${FILESDIR}/${PN}-27.4-findJsonCpp.patch"
+	"${FILESDIR}/${PN}-28.0-disable-test_upb-lto.patch"
+)
+
+DOCS=( CONTRIBUTORS.txt README.md )
+
+src_prepare() {
+	cmake_src_prepare
+
+	cp "${FILESDIR}/FindJsonCpp.cmake" "${S}/cmake" || die
+}
+
+multilib_src_configure() {
+	local mycmakeargs=(
+		-Dprotobuf_ABSL_PROVIDER="package"
+		-Dprotobuf_JSONCPP_PROVIDER="package"
+
+		-Dprotobuf_BUILD_CONFORMANCE="$(usex test "$(usex conformance)")"
+		-Dprotobuf_BUILD_LIBPROTOC="$(usex libprotoc)"
+		-Dprotobuf_BUILD_LIBUPB="$(usex libupb)"
+		-Dprotobuf_BUILD_PROTOBUF_BINARIES="$(usex protobuf)"
+		-Dprotobuf_BUILD_PROTOC_BINARIES="$(usex protoc)"
+		-Dprotobuf_BUILD_SHARED_LIBS="yes"
+		-Dprotobuf_BUILD_TESTS="$(usex test)"
+
+		-Dprotobuf_DISABLE_RTTI="no"
+
+		-Dprotobuf_INSTALL="yes"
+		-Dprotobuf_TEST_XML_OUTDIR="$(usex test)"
+
+		-Dprotobuf_WITH_ZLIB="$(usex zlib)"
+		-Dprotobuf_VERBOSE="$(usex debug)"
+		-DCMAKE_MODULE_PATH="${S}/cmake"
+	)
+	if use protobuf ; then
+		if use examples ; then
+			mycmakeargs+=(
+				-Dprotobuf_BUILD_EXAMPLES="$(usex examples)"
+				-Dprotobuf_INSTALL_EXAMPLES="$(usex examples)"
+			)
+		fi
+	fi
+
+	use test && mycmakeargs+=( -Dprotobuf_USE_EXTERNAL_GTEST="yes" )
+
+	cmake_src_configure
+}
+
+src_compile() {
+	cmake-multilib_src_compile
+
+	if use emacs; then
+		elisp-compile editors/protobuf-mode.el
+	fi
+}
+
+src_test() {
+	local -x srcdir="${S}/src"
+
+	local -x TEST_TMPDIR="${T%/}/TEST_TMPDIR_${ABI}"
+	mkdir -m 777 "${TEST_TMPDIR}" || die
+
+	setup_test_env() {
+		ln -sr "${S}/src" "${BUILD_DIR}/include" || die
+	}
+
+	multilib_foreach_abi setup_test_env
+
+	# Do headstands for LTO # 942985
+	local -x GTEST_FILTER
+	GTEST_FILTER="-FileDescriptorSetSource/EncodeDecodeTest*"
+
+	cmake-multilib_src_test
+
+	GTEST_FILTER="${GTEST_FILTER//-/}"
+
+	cmake-multilib_src_test
+}
+
+multilib_src_install_all() {
+	find "${ED}" -name "*.la" -delete || die
+
+	if [[ ! -f "${ED}/usr/$(get_libdir)/libprotobuf$(get_libname ${SLOT#*/})" ]]; then
+		eerror "No matching library found with SLOT variable, currently set: ${SLOT}\n" \
+			"Expected value: ${ED}/usr/$(get_libdir)/libprotobuf$(get_libname ${SLOT#*/})"
+		die "Please update SLOT variable"
+	fi
+
+	insinto /usr/share/vim/vimfiles/syntax
+	doins editors/proto.vim
+	insinto /usr/share/vim/vimfiles/ftdetect
+	doins "${FILESDIR}/proto.vim"
+
+	if use emacs; then
+		elisp-install "${PN}" editors/protobuf-mode.el*
+		elisp-site-file-install "${FILESDIR}/70${PN}-gentoo.el"
+	fi
+
+	if use examples; then
+		DOCS+=(examples)
+		docompress -x "/usr/share/doc/${PF}/examples"
+	fi
+
+	einstalldocs
+}
+
+pkg_postinst() {
+	use emacs && elisp-site-regen
+}
+
+pkg_postrm() {
+	use emacs && elisp-site-regen
+}