sys-libs/libunwind: Sync with Gentoo

It's from Gentoo commit 6a7660e8cfed53d82e252d4a395531888dbba077.

Signed-off-by: Flatcar Buildbot <buildbot@flatcar-linux.org>

sdk_container/src/third_party/portage-stable/sys-libs/libunwind/files/libunwind-1.8.2-x32.patch

@@ -0,0 +1,26 @@
+https://bugs.gentoo.org/961995
+https://github.com/libunwind/libunwind/commit/244a713c37b5fd5963334888b63def0c401aa391
+
+From 244a713c37b5fd5963334888b63def0c401aa391 Mon Sep 17 00:00:00 2001
+From: aokblast <aokblast@FreeBSD.org>
+Date: Tue, 30 Jul 2024 12:17:20 +0800
+Subject: [PATCH] add Fix of ELFW in find_build_id_path
+
+--- a/src/elfxx.c
++++ b/src/elfxx.c
+@@ -819,10 +819,10 @@ elf_w (find_build_id_path) (const struct elf_image *ei, char *path, unsigned pat
+           const char prefix[] = "/usr/lib/debug/.build-id/";
+ 
+           /* See "man 5 elf" for notes about alignment in Nhdr */
+-          const Elf_W(Nhdr) *nhdr = (const ElfW(Nhdr) *) notes;
+-          const ElfW(Word) namesz = nhdr->n_namesz;
+-          const ElfW(Word) descsz = nhdr->n_descsz;
+-          const ElfW(Word) nameasz = UNW_ALIGN(namesz, 4); /* Aligned size */
++          const Elf_W(Nhdr) *nhdr = (const Elf_W(Nhdr) *) notes;
++          const Elf_W(Word) namesz = nhdr->n_namesz;
++          const Elf_W(Word) descsz = nhdr->n_descsz;
++          const Elf_W(Word) nameasz = UNW_ALIGN(namesz, 4); /* Aligned size */
+           const char *name = (const char *) (nhdr + 1);
+           const uint8_t *desc = (const uint8_t *) name + nameasz;
+           unsigned j;
+

sdk_container/src/third_party/portage-stable/sys-libs/libunwind/libunwind-1.8.2-r1.ebuild

@@ -0,0 +1,138 @@
+# Copyright 2005-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+# Generate using https://github.com/thesamesam/sam-gentoo-scripts/blob/main/niche/generate-libunwind-docs
+# Set to 1 if prebuilt, 0 if not
+# (the construct below is to allow overriding from env for script)
+: ${LIBUNWIND_DOCS_PREBUILT:=1}
+
+LIBUNWIND_DOCS_PREBUILT_DEV=sam
+LIBUNWIND_DOCS_VERSION=1.8.0
+# Default to generating docs (inc. man pages) if no prebuilt; overridden later
+LIBUNWIND_DOCS_USEFLAG="+doc"
+
+inherit libtool multilib-minimal
+
+DESCRIPTION="Portable and efficient API to determine the call-chain of a program"
+HOMEPAGE="https://savannah.nongnu.org/projects/libunwind"
+
+if [[ ${PV} == 9999 ]] ; then
+	LIBUNWIND_DOCS_PREBUILT=0
+
+	EGIT_REPO_URI="https://github.com/libunwind/libunwind"
+	inherit autotools git-r3
+else
+	SRC_URI="https://github.com/libunwind/libunwind/releases/download/v${PV/_rc/-rc}/${P/_rc/-rc}.tar.gz"
+	if [[ ${LIBUNWIND_DOCS_PREBUILT} == 1 ]] ; then
+		SRC_URI+=" !doc? ( https://dev.gentoo.org/~${LIBUNWIND_DOCS_PREBUILT_DEV}/distfiles/${CATEGORY}/${PN}/${PN}-${LIBUNWIND_DOCS_VERSION}-docs.tar.xz )"
+	fi
+	S="${WORKDIR}"/${P/_rc/-rc}
+
+	if [[ ${PV} != *_rc* ]] ; then
+		KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~loong ~mips ~ppc ~ppc64 ~riscv ~s390 -sparc ~x86 ~amd64-linux ~x86-linux"
+	fi
+fi
+
+[[ ${LIBUNWIND_DOCS_PREBUILT} == 1 ]] && LIBUNWIND_DOCS_USEFLAG="doc"
+
+LICENSE="MIT"
+SLOT="0/8" # libunwind.so.8
+IUSE="debug debug-frame ${LIBUNWIND_DOCS_USEFLAG} libatomic lzma static-libs test zlib"
+# XXX: if enabling tests again, make sure to arrange for deleting them so they don't get installed
+# https://github.com/libunwind/libunwind/pull/722
+RESTRICT="test !test? ( test )" # some tests are broken (toolchain version dependent, rely on external binaries)
+
+BDEPEND="
+	doc? ( app-text/texlive-core )
+"
+RDEPEND="
+	lzma? ( app-arch/xz-utils[static-libs?,${MULTILIB_USEDEP}] )
+	zlib? ( sys-libs/zlib[static-libs?,${MULTILIB_USEDEP}] )
+"
+# We just use the header from libatomic.
+DEPEND="
+	${RDEPEND}
+	libatomic? ( dev-libs/libatomic_ops[${MULTILIB_USEDEP}] )
+"
+
+MULTILIB_WRAPPED_HEADERS=(
+	/usr/include/libunwind.h
+
+	# see libunwind.h for the full list of arch-specific headers
+	/usr/include/libunwind-aarch64.h
+	/usr/include/libunwind-arm.h
+	/usr/include/libunwind-hppa.h
+	/usr/include/libunwind-ia64.h
+	/usr/include/libunwind-mips.h
+	/usr/include/libunwind-ppc32.h
+	/usr/include/libunwind-ppc64.h
+	/usr/include/libunwind-riscv.h
+	/usr/include/libunwind-sh.h
+	/usr/include/libunwind-tilegx.h
+	/usr/include/libunwind-x86.h
+	/usr/include/libunwind-x86_64.h
+)
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-1.8.2-x32.patch
+)
+
+src_prepare() {
+	default
+
+	chmod +x src/ia64/mk_cursor_i || die
+
+	if [[ ${PV} == 9999 ]] ; then
+		eautoreconf
+	else
+		elibtoolize
+	fi
+}
+
+multilib_src_configure() {
+	local myeconfargs=(
+		# --enable-cxx-exceptions: always enable it, headers provide the interface
+		# and on some archs it is disabled by default causing a mismatch between the
+		# API and the ABI, bug #418253
+		--enable-cxx-exceptions
+		--enable-coredump
+		--enable-ptrace
+		--enable-setjmp
+		$(use_enable debug-frame)
+		$(multilib_native_use_enable doc documentation)
+		$(use_enable lzma minidebuginfo)
+		$(use_enable static-libs static)
+		$(use_enable zlib zlibdebuginfo)
+		# conservative-checks: validate memory addresses before use; as of 1.0.1,
+		# only x86_64 supports this, yet may be useful for debugging, couple it with
+		# debug useflag.
+		$(use_enable debug conservative_checks)
+		$(use_enable debug)
+		$(use_enable test tests)
+	)
+
+	export ac_cv_header_atomic_ops_h=$(usex libatomic)
+
+	ECONF_SOURCE="${S}" econf "${myeconfargs[@]}"
+}
+
+multilib_src_compile() {
+	# bug #586208
+	CCACHE_NODIRECT=1 default
+}
+
+multilib_src_test() {
+	# Sandbox causes some tests to freak out.
+	SANDBOX_ON=0 emake check
+}
+
+multilib_src_install_all() {
+	find "${ED}" -name "*.la" -type f -delete || die
+
+	# If USE=doc, there'll be newly generated docs which we install instead.
+	if ! use doc && [[ ${LIBUNWIND_DOCS_PREBUILT} == 1 ]] ; then
+		doman "${WORKDIR}"/${PN}-${LIBUNWIND_DOCS_VERSION}-docs/man*/*.[0-8]
+	fi
+}