dev-libs/expat: Sync with Gentoo

It's from Gentoo commit a170c21d9f7d5e58af62d25c57b91d4527b7aba0.

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

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

@@ -4,3 +4,4 @@ DIST expat-2.7.0.tar.xz 493060 BLAKE2B 44567e955b8cf2053665140b3557897c6e0e66c7e
 DIST expat-2.7.1.tar.xz 496108 BLAKE2B 243ef1c3578234135018d31b567c88a50cadddac86441e4d4a6d6330e113596edbad13b40c79f541d49487e7df98d798032d39ec28b7d67d22f46e4290d14519 SHA512 4c9a6c1c1769d2c4404da083dd3013dbc73883da50e2b7353db2349a420e9b6d27cac7dbcb645991d6c7cdbf79bd88486fc1ac353084ce48e61081fb56e13d46
 DIST expat-2.7.2.tar.xz 503392 BLAKE2B 35525274817dab4d6ae8698f5f83978e633a6e4afe7cf3b126c87d5aba4b64bcb9d26ec3e4a39b1ea82a7430e290950595bfa4150266ef3806026b423a870e33 SHA512 da64ae6d1762388873acbad9bc0edc80094c693bccacf89ca90d1626f53866c5e87c2019276e39643963d6479fb8a6d7b1f05f38caa1be84a24ff9d603449e38
 DIST expat-2.7.3.tar.xz 504744 BLAKE2B 26d4c9cb2c9b2a5b9ca9a86e9ea754e832f397bdb8ef266587b146591ff1358b2f439153f2eadb584180be6aee85050f19987565bbedf215993061ce5c85c5c9 SHA512 d2e495a9a2b902d38d838ec514da67ff56b76cdefcf89d0c320e2f319a35e439bd697880334d0ee70ca79b4515ac94c0c9b9ff97f899bcaa89308f1c8efaee0d
+DIST expat-2.7.4.tar.xz 507328 BLAKE2B 167518530b3e88f7ecb6aecc5eb54a41a740f7184732dd72fafe9bfdcda0b94c537331543744b8b0eaf918d5f0b82dbe311ee4192a592b74e5d65dc577ed8f6a SHA512 a5533b99b1e0b73adcbe1f1b4816ce04e963fb6b734e6018c823597297a367a0524f31e040e3320122398833371f3f7caf4f9bf3cb91594a38151b2672edfa8f

sdk_container/src/third_party/portage-stable/dev-libs/expat/expat-2.7.4.ebuild

@@ -0,0 +1,100 @@
+# Copyright 1999-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+AUTOTOOLS_AUTO_DEPEND=no
+inherit autotools multilib-minimal
+
+DESCRIPTION="Stream-oriented XML parser library"
+HOMEPAGE="https://libexpat.github.io/"
+SRC_URI="https://github.com/libexpat/libexpat/releases/download/R_${PV//\./_}/expat-${PV}.tar.xz"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~alpha amd64 arm arm64 ~hppa ~loong ~m68k ~mips ppc ppc64 ~riscv ~s390 ~sparc x86 ~arm64-macos ~x64-macos ~x64-solaris"
+IUSE="examples static-libs test unicode"
+RESTRICT="!test? ( test )"
+BDEPEND="unicode? ( ${AUTOTOOLS_DEPEND} )"
+
+DOCS=( README.md )
+
+QA_CONFIG_IMPL_DECL_SKIP=(
+	# https://bugs.gentoo.org/906384
+	arc4random
+	arc4random_buf
+)
+
+src_prepare() {
+	default
+
+	# fix interpreter to be a recent/good shell
+	sed -i -e "1s:/bin/sh:${BASH}:" conftools/get-version.sh || die
+	if use unicode; then
+		cp -R "${S}" "${S}"w || die
+		pushd "${S}"w >/dev/null
+		find -name Makefile.am \
+			-exec sed \
+			-e 's,libexpat\.la,libexpatw.la,' \
+			-e 's,libexpat_la,libexpatw_la,' \
+			-i {} + || die
+		eautoreconf
+		popd >/dev/null
+	fi
+}
+
+multilib_src_configure() {
+	local myconf="$(use_with test tests) $(use_enable static-libs static) --without-docbook"
+
+	mkdir -p "${BUILD_DIR}"w || die
+
+	if use unicode; then
+		pushd "${BUILD_DIR}"w >/dev/null
+		CPPFLAGS="${CPPFLAGS} -DXML_UNICODE" ECONF_SOURCE="${S}"w econf ${myconf}
+		popd >/dev/null
+	fi
+
+	ECONF_SOURCE="${S}" econf ${myconf}
+}
+
+multilib_src_compile() {
+	emake
+
+	if use unicode; then
+		pushd "${BUILD_DIR}"w >/dev/null
+		emake -C lib
+		popd >/dev/null
+	fi
+}
+
+multilib_src_install() {
+	emake install DESTDIR="${D}"
+
+	if use unicode; then
+		pushd "${BUILD_DIR}"w >/dev/null
+		emake -C lib install DESTDIR="${D}"
+		popd >/dev/null
+
+		pushd "${ED}"/usr/$(get_libdir)/pkgconfig >/dev/null
+		cp expat.pc expatw.pc
+		sed -i -e '/^Libs/s:-lexpat:&w:' expatw.pc || die
+		popd >/dev/null
+	fi
+}
+
+multilib_src_install_all() {
+	einstalldocs
+
+	doman doc/xmlwf.1
+
+	# Note: Use of HTML_DOCS would add unwanted "doc" subfolder
+	docinto html
+	dodoc doc/*.{css,html}
+
+	if use examples; then
+		docinto examples
+		dodoc examples/*.c
+		docompress -x usr/share/doc/${PF}/examples
+	fi
+
+	find "${D}" -name '*.la' -type f -delete || die
+}