xdp-tools had broken tests that always failed because of version tags in global.

net-libs/xdp-tools/Manifest

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+DIST xdp-tools-1.5.0.tar.gz 353321 BLAKE2B 41ef06c544af743a8542306af93b1d2a671e53118aa9c4230521c755868245d854ef4ed38ac47102869c18104d67808e8ede8baef45dde8811b074501fc34520 SHA512 9713280fc5d58c19f972cced614f0acdb21de0f467439af2364217ae5381963f90c9e4aba9b6de1a8fdb7fa36c1f645c42b9cd1c86a2cd60168a3b974f14c0dd

net-libs/xdp-tools/metadata.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+  <maintainer type="person" proxied="yes">
+    <email>holger@applied-asynchrony.com</email>
+    <name>Holger Hoffstätte</name>
+  </maintainer>
+  <maintainer type="project" proxied="proxy">
+    <email>proxy-maint@gentoo.org</email>
+    <name>Proxy Maintainers</name>
+  </maintainer>
+  <maintainer type="person">
+    <email>zx2c4@gentoo.org</email>
+    <name>Jason A. Donenfeld</name>
+  </maintainer>
+  <upstream>
+    <remote-id type="github">xdp-project/xdp-tools</remote-id>
+  </upstream>
+  <use>
+    <flag name="tools">Install various helper tools rather than just libxdp.</flag>
+  </use>
+</pkgmetadata>

net-libs/xdp-tools/xdp-tools-1.5.0-r1.ebuild

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+# Copyright 2021-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit flag-o-matic linux-info toolchain-funcs
+
+DESCRIPTION="The libxdp library and various tools for use with XDP"
+HOMEPAGE="https://github.com/xdp-project/xdp-tools"
+SRC_URI="https://github.com/xdp-project/${PN}/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="GPL-2 LGPL-2.1 BSD-2"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~arm64 ~loong ~ppc ~ppc64 ~riscv ~x86"
+IUSE="+tools test"
+
+DEPEND="
+	dev-libs/libbpf:=
+	net-libs/libpcap
+	sys-libs/zlib
+	virtual/libelf
+"
+RDEPEND="${DEPEND}"
+BDEPEND="
+	dev-util/bpftool
+	sys-apps/grep[pcre]
+	llvm-core/clang:*[llvm_targets_BPF]
+	sys-devel/m4
+"
+
+# Not prebuilt -- we build them -- but they're not ordinary ELF objects either.
+QA_PREBUILT="usr/lib/bpf/*.o"
+
+MAKEOPTS+=" V=1"
+
+CONFIG_CHECK="~BPF ~BPF_JIT ~BPF_SYSCALL ~HAVE_EBPF_JIT ~XDP_SOCKETS ~XDP_SOCKETS_DIAG"
+
+src_prepare() {
+	# remove -Werror: #899744
+	sed -i 's/-Werror//g' lib/Makefile lib/defines.mk || die
+	sed -i '/-Werror/d' lib/common.mk lib/libxdp/Makefile \
+		lib/libxdp/tests/Makefile lib/util/Makefile || die
+	if ! use test; then
+		sed -i 's/check man/man/g' lib/libxdp/Makefile || die
+	fi
+
+	default
+}
+
+src_configure() {
+	# filter LTO: #861587
+	filter-lto
+
+	# filter LDFLAGS some more: #916591
+	filter-ldflags -Wl,--{icf,lto}*
+
+	# force ld.bfd: #916591
+	tc-ld-force-bfd
+
+	export CC="$(tc-getCC)"
+	export PREFIX="${EPREFIX}/usr"
+	export LIBDIR="${PREFIX}/$(get_libdir)"
+	export BPF_OBJECT_DIR="${PREFIX}/lib/bpf"
+	export PRODUCTION=1
+	export DYNAMIC_LIBXDP=1
+	export FORCE_SYSTEM_LIBBPF=1
+
+	default
+}
+
+src_test() { :; }
+
+src_install() {
+	default
+
+	# To remove the scripts/testing files that are installed.
+	rm -r "${ED}/usr/share/xdp-tools" || die
+	# We can't control static archive generation yet.
+	rm "${ED}/usr/$(get_libdir)/libxdp.a" || die
+
+	use tools || { rm "${ED}/usr/sbin"/* || die; }
+
+	# These are ELF objects but BPF ones.
+	dostrip -x /usr/lib/bpf
+}
+
+pkg_postinst() {
+	elog
+	elog "Many BPF utilities need access to a mounted bpffs virtual file system."
+	elog "Either mount it manually like this:"
+	elog
+	elog "  mount bpffs /sys/fs/bpf -t bpf -o nosuid,nodev,noexec,relatime,mode=700"
+	elog
+	elog "or add the following line to your /etc/fstab to always mount it at boot time:"
+	elog
+	elog "  bpffs  /sys/fs/bpf  bpf  nosuid,nodev,noexec,relatime,mode=700  0 0"
+	elog
+	elog "You can verify that bpffs is mounted with:"
+	elog
+	elog "  mount | grep /sys/fs/bpf"
+	elog
+}