dev-libs/libffi: Sync with Gentoo

It's from Gentoo commit 8501c747e8a696b11b59ecb67f9ca615f2822838.

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

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

@@ -1,2 +1,3 @@
 DIST libffi-3.4.8.tar.gz 1397992 BLAKE2B 10b3d970dc598fb8689bca49751cda499ddc5216baf89d38625385b0d42d57f10d15cce3c4c044c9c73a4fce384c26f2a8e1b99269e9db1174c2631201c6bfd4 SHA512 05344c6c1a1a5b44704f6cf99277098d1ea3ac1dc11c2a691c501786a214f76184ec0637135588630db609ce79e49df3dbd00282dd61e7f21137afba70e24ffe
 DIST libffi-3.5.1.tar.gz 1419757 BLAKE2B eaeb04beeb4ab6e0ef5652175d5c9d29a18b6f1edbf05db819a3a6ac9c8ed47de32c54fca4c3a9a476283c0771650d5a577e7868f16c671ee46e25db27369066 SHA512 3da9e21fdb920e7962ceb01ee671ef36196df4d5dad62e0cdd8e87cc60e350f241c204350560ae26ea04cc898161b5585c8a5a5125bdbcc84508efbb7ea61eb8
+DIST libffi-3.5.2.tar.gz 1423124 BLAKE2B 35ce590926bcdd2556c30c94bb0fef3f0cfe8f32e809ffad00eb0bc7a8ba1ba40da844b108069c87e86bff278221cc42dc7c7aacd02a7b7bc408ea054085398c SHA512 76974a84e3aee6bbd646a6da2e641825ae0b791ca6efdc479b2d4cbcd3ad607df59cffcf5031ad5bd30822961a8c6de164ac8ae379d1804acd388b1975cdbf4d

sdk_container/src/third_party/portage-stable/dev-libs/libffi/libffi-3.5.2.ebuild

@@ -0,0 +1,97 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit dot-a multilib-minimal preserve-libs
+
+MY_PV=${PV/_rc/-rc}
+MY_P=${PN}-${MY_PV}
+
+DESCRIPTION="Portable, high level programming interface to various calling conventions"
+HOMEPAGE="https://sourceware.org/libffi/"
+
+if [[ ${PV} == 9999 ]] ; then
+	EGIT_REPO_URI="https://github.com/libffi/libffi"
+	inherit autotools git-r3
+else
+	inherit libtool
+	SRC_URI="https://github.com/libffi/libffi/releases/download/v${MY_PV}/${MY_P}.tar.gz"
+
+	if [[ ${PV} != *@(alpha|beta|pre|rc)* ]] ; then
+		KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~arm64-macos ~ppc-macos ~x64-macos ~x64-solaris"
+	fi
+fi
+
+S="${WORKDIR}"/${MY_P}
+
+LICENSE="MIT"
+# This is a core package which is depended on by e.g. Python.
+# Please use preserve-libs.eclass in pkg_{pre,post}inst to cover users
+# with FEATURES="-preserved-libs" or another package manager if SONAME changes.
+SLOT="0/8" # SONAME=libffi.so.8
+IUSE="debug +exec-static-trampoline pax-kernel static-libs test"
+
+RESTRICT="!test? ( test )"
+BDEPEND="test? ( dev-util/dejagnu )"
+
+src_prepare() {
+	default
+
+	if [[ ${PV} == 9999 ]] ; then
+		eautoreconf
+	else
+		elibtoolize
+	fi
+
+	if [[ ${CHOST} == arm64-*-darwin* ]] ; then
+		# ensure we use aarch64 asm, not x86 on arm64
+		sed -i -e 's/aarch64\*-\*-\*/arm64*-*-*|&/' \
+			configure configure.host || die
+	fi
+}
+
+src_configure() {
+	use static-libs && lto-guarantee-fat
+	multilib-minimal_src_configure
+}
+
+multilib_src_configure() {
+	# --includedir= path maintains a few properties:
+	# 1. have stable name across libffi versions: some packages like
+	#    dev-lang/ghc or kde-frameworks/networkmanager-qt embed
+	#    ${includedir} at build-time. Don't require those to be
+	#    rebuilt unless SONAME changes. bug #695788
+	#
+	#    We use /usr/.../${PN} (instead of former /usr/.../${P}).
+	#
+	# 2. have ${ABI}-specific location as ffi.h is target-dependent.
+	#
+	#    We use /usr/$(get_libdir)/... to have ABI identifier.
+	ECONF_SOURCE="${S}" econf \
+		--includedir="${EPREFIX}"/usr/$(get_libdir)/${PN}/include \
+		--disable-multi-os-directory \
+		--with-pic \
+		$(use_enable static-libs static) \
+		$(use_enable exec-static-trampoline exec-static-tramp) \
+		$(use_enable pax-kernel pax_emutramp) \
+		$(use_enable debug)
+}
+
+multilib_src_test() {
+	emake -Onone check
+}
+
+multilib_src_install_all() {
+	einstalldocs
+	find "${ED}" -name "*.la" -delete || die
+	strip-lto-bytecode
+}
+
+pkg_preinst() {
+	preserve_old_lib /usr/$(get_libdir)/libffi.so.7
+}
+
+pkg_postinst() {
+	preserve_old_lib_notify /usr/$(get_libdir)/libffi.so.7
+}