dev-libs/xxhash: Sync with Gentoo

It's from Gentoo commit 6cb8017d761e428796f3564508c3e0d2e56986da.

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

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

@@ -1,2 +1 @@
-DIST xxhash-0.8.2.tar.gz 1141188 BLAKE2B 735408256240760778fa516e01bed428f04837eb4e059c512e924f13e4a96db6cacbbefb04dea65a37b0f25b52cf13c4927a6e7870dc8c0d45b1b955d4ba3da1 SHA512 3e3eef21432fe88bc4dd9940ccad0308fdea3537b06fa5ac0e74c1bde53413dff29c8b3fc617a8a42b9ce88fcf213311d338a31b1ce73b3729342c9e68f06c78
 DIST xxhash-0.8.3.tar.gz 1147630 BLAKE2B 75923c7c5df3490062791fa02ccddfb7281b3646e2b3e4b4a0c0d611c339e07c8d9cb656777fd0fcec9cda484f7b33edf080116bb011f70d6b8299cda63afa4e SHA512 8b5c8b9aad4e869f28310b12cc314037feda81d92f26c23eaecdb35dc65042ca2e65f2e9606033e62a31bcc737a9a950500ffcbdb8677d6ab20e820ea14f2b79

sdk_container/src/third_party/portage-stable/dev-libs/xxhash/xxhash-0.8.2.ebuild

@@ -1,43 +0,0 @@
-# Copyright 1999-2025 Gentoo Authors
-# Distributed under the terms of the GNU General Public License v2
-
-EAPI=8
-
-inherit multilib-minimal toolchain-funcs
-
-DESCRIPTION="Extremely fast non-cryptographic hash algorithm"
-HOMEPAGE="https://xxhash.com/"
-SRC_URI="https://github.com/Cyan4973/xxHash/archive/v${PV}.tar.gz -> ${P}.tar.gz"
-S=${WORKDIR}/xxHash-${PV}
-
-LICENSE="BSD-2 GPL-2+"
-# https://abi-laboratory.pro/tracker/timeline/xxhash
-SLOT="0"
-KEYWORDS="~alpha amd64 arm arm64 ~hppa ~loong ~mips ppc ppc64 ~riscv ~s390 ~sparc x86 ~x64-macos"
-
-src_prepare() {
-	default
-
-	multilib_copy_sources
-}
-
-multilib_src_compile() {
-	emake AR="$(tc-getAR)" CC="$(tc-getCC)"
-}
-
-multilib_src_test() {
-	emake CC="$(tc-getCC)" check
-}
-
-multilib_src_install() {
-	local emakeargs=(
-		DESTDIR="${D}"
-		PREFIX="${EPREFIX}"/usr
-		LIBDIR="${EPREFIX}"/usr/$(get_libdir)
-	)
-
-	emake "${emakeargs[@]}" install
-	einstalldocs
-
-	rm "${ED}"/usr/$(get_libdir)/libxxhash.a || die
-}

sdk_container/src/third_party/portage-stable/dev-libs/xxhash/xxhash-0.8.3-r2.ebuild

@@ -0,0 +1,62 @@
+# Copyright 1999-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit dot-a flag-o-matic multilib-minimal toolchain-funcs
+
+DESCRIPTION="Extremely fast non-cryptographic hash algorithm"
+HOMEPAGE="https://xxhash.com/"
+SRC_URI="https://github.com/Cyan4973/xxHash/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+S=${WORKDIR}/xxHash-${PV}
+
+LICENSE="BSD-2 GPL-2+"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~arm64-macos ~x64-macos ~x64-solaris"
+IUSE="static-libs"
+
+src_prepare() {
+	default
+
+	multilib_copy_sources
+}
+
+src_configure() {
+	# Needed for -Og to be buildable, otherwise fails a/ always_inline (bug #961093)
+	# https://github.com/Cyan4973/xxHash?tab=readme-ov-file#binary-size-control
+	is-flagq '-Og' && append-cppflags -DXXH_NO_INLINE_HINTS
+	multilib-minimal_src_configure
+
+	use static-libs && lto-guarantee-fat
+}
+
+myemake() {
+	# need LIBDIR set during compile too for Darwin, bug #966267
+	emake \
+		AR="$(tc-getAR)" \
+		CC="$(tc-getCC)" \
+		PREFIX="${EPREFIX}"/usr \
+		LIBDIR="${EPREFIX}"/usr/$(get_libdir) \
+		MANDIR='$(man1dir)' \
+		"${@}"
+}
+
+multilib_src_compile() {
+	myemake
+}
+
+multilib_src_test() {
+	# Injecting CPPFLAGS into CFLAGS is needed for test_sanity
+	myemake CFLAGS="${CPPFLAGS} ${CFLAGS}" check
+}
+
+multilib_src_install() {
+	myemake DESTDIR="${D}" install
+	einstalldocs
+
+	if ! use static-libs; then
+		rm "${ED}"/usr/$(get_libdir)/libxxhash.a || die
+	else
+		strip-lto-bytecode
+	fi
+}

sdk_container/src/third_party/portage-stable/dev-libs/xxhash/xxhash-0.8.3.ebuild

@@ -12,7 +12,7 @@ S=${WORKDIR}/xxHash-${PV}
 
 LICENSE="BSD-2 GPL-2+"
 SLOT="0"
-KEYWORDS="~alpha amd64 arm arm64 ~hppa ~loong ~mips ppc ppc64 ~riscv ~s390 ~sparc x86 ~x64-macos"
+KEYWORDS="~alpha amd64 arm arm64 ~hppa ~loong ~m68k ~mips ppc ppc64 ~riscv ~s390 ~sparc x86 ~arm64-macos ~x64-macos ~x64-solaris"
 
 src_prepare() {
 	default