diff --git a/dev-build/autoconf/Manifest b/dev-build/autoconf/Manifest
index 08c6d1ab3d7f9..7698a4ec3a51f 100644
--- a/dev-build/autoconf/Manifest
+++ b/dev-build/autoconf/Manifest
@@ -4,5 +4,7 @@ DIST autoconf-2.69.tar.xz 1214744 BLAKE2B 71d33d72a06e9a05fbed0eda73bc9d8a3805c7
 DIST autoconf-2.69.tar.xz.sig 556 BLAKE2B 07eaae3429f4bbd3ea40b4b366db383d9e322b03def7956f8961a20a6759072e8c327d4723313097f75caba0513928c37270beda8f8b491888fdd47a2ee80ad6 SHA512 e54082e00522463ba7d6b6ea6d700b8799a41177b34e057dd72abbe46219f0ce58674575d60fb106e37deeee8871d4ccfd85746c2d0e096a71eb096ffdb3020c
 DIST autoconf-2.71.tar.xz 1292296 BLAKE2B 7fd4b98b4cfff10720e8da6ee91045637991643b50fcb3e47a0ecfcc01600f7b7b36fd1c0a5f08b68a418f1bdbd8d5a98de1008157595dd37cc3a31facb61416 SHA512 73d32b4adcbe24e3bafa9f43f59ed3b6efbd3de0f194e5ec90375f35da1199c583f5d3e89139b7edbad35171403709270e339ffa56a2ecb9b3123e9285021ff0
 DIST autoconf-2.71.tar.xz.sig 833 BLAKE2B a2641a0bec3b475874811dd21dc32d34672f4f084ea16d48bd0655df37251be810026c20e35869503e664701edcb64f260b142db671e160a554c2ee982838355 SHA512 83e6bf4504f5d188cad1387ce1f1ce4b14f5ee4961bbfd5c83dd281d724392a95b394079bfaa093eb81129873e668b6ca1eee013a60cfb76edf34454756f6667
+DIST autoconf-2.72.90.tar.xz 1409292 BLAKE2B 1d0a30ba22b25d7298676f40b56541b25906e95dc0381914e8941f8bd716585098efa8295ed3db9b4e234a073af6771f33db9397907d4beeadf5b9460842c9b2 SHA512 f485f10b2917759245dc1d5e7e7b6724d8b626543757853ae9de354a4c14b8ed3a016d1823d9553072fe08634d4fb9e0f5110637622b3c95e0f625b328f96f01
+DIST autoconf-2.72.90.tar.xz.sig 870 BLAKE2B 01eddca0f27ee008f3b833ed2e34040243fab369003a92352fc9b11a419353814604bc12c67ffc699b79752df90ffaab6e148469806ec3948def9d64e174f888 SHA512 87233fe09c17b752b97f68b4a4b159ccc96da89b279fed0a2e5b7fe72989a677d8303da9cc3bad21a6c074baa425120a7bcf289f0c65d1be4e89594449415dcb
 DIST autoconf-2.72.tar.xz 1389680 BLAKE2B 01caeced9e53d8bd39fb0cf4929322f0d463971b0a96368aa55892026897a9e98c2ca84a77db1b3c6c4483aea54b96da16a7bc00b7ac15e23c6b0471438012db SHA512 c4e9fbd858666d3e5c3b4fe7f89aa3e8e3a0a00dc7e166f8147d937d911b77ba3ac6a016f9d223ccdd830bc8960b3e60397c0607cc6a1fd2c50c7492839ddd17
 DIST autoconf-2.72.tar.xz.sig 833 BLAKE2B cc33101c5d2bd28f233e54a2843d3c81dc9729238b0900a8f23ef17b982aa0e0194892c07b1365246b6c9c0ea74becd288ae581ee34d593131b83538c69a6204 SHA512 7a0d350b23cf47c45811ae35928a4fec67ce1f3adb1965904fe6d9a0fad68139df4902662bcf4731a2f809381cae0b265a8f1f57d0a9a39777250a97a3c481d9
diff --git a/dev-build/autoconf/autoconf-2.72.90.ebuild b/dev-build/autoconf/autoconf-2.72.90.ebuild
new file mode 100644
index 0000000000000..ec41a181b6638
--- /dev/null
+++ b/dev-build/autoconf/autoconf-2.72.90.ebuild
@@ -0,0 +1,108 @@
+# Copyright 1999-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+# Bumping notes:
+# * Remember to modify LAST_KNOWN_VER 'upstream' in dev-build/autoconf-wrapper
+# on new autoconf releases, as well as the dependency in RDEPEND below too.
+# * Update _WANT_AUTOCONF and _autoconf_atom case statement in autotools.eclass.
+
+if [[ ${PV} == 9999 ]] ; then
+	EGIT_REPO_URI="https://git.savannah.gnu.org/git/autoconf.git"
+	inherit git-r3
+	AUTOCONF_SLOT="9999"
+else
+	#PATCH_TARBALL_NAME="${PN}-2.70-patches-01"
+
+	VERIFY_SIG_OPENPGP_KEY_PATH=/usr/share/openpgp-keys/zackweinberg.asc
+	inherit verify-sig
+
+	SRC_URI="
+		mirror://gnu/${PN}/${P}.tar.xz
+		https://alpha.gnu.org/gnu/${PN}/${P}.tar.xz
+		https://meyering.net/ac/${P}.tar.xz
+		verify-sig? (
+			https://alpha.gnu.org/gnu/${PN}/${P}.tar.xz.sig
+			mirror://gnu/${PN}/${P}.tar.xz.sig
+		)
+	"
+
+	AUTOCONF_EXTRA_VER=$(ver_cut 3)
+	if [[ ${AUTOCONF_EXTRA_VER} -ge 90 ]] ; then
+		# Prereleases get no keywords and their slot bumped up
+		# e.g. SLOT for 2.72(.90) -> 2.73
+		AUTOCONF_SLOT=$(ver_cut 1).$((($(ver_cut 2) + 1)))
+	else
+		AUTOCONF_SLOT=$(ver_cut 1-2)
+		KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~arm64-macos ~x64-macos ~x64-solaris"
+	fi
+
+	BDEPEND="verify-sig? ( sec-keys/openpgp-keys-zackweinberg )"
+fi
+
+inherit toolchain-autoconf multiprocessing
+
+DESCRIPTION="Used to create autoconfiguration files"
+HOMEPAGE="https://www.gnu.org/software/autoconf/autoconf.html"
+
+LICENSE="GPL-3+"
+SLOT="${AUTOCONF_SLOT}"
+
+BDEPEND+="
+	>=dev-lang/perl-5.10
+	>=sys-devel/m4-1.4.16
+"
+RDEPEND="
+	${BDEPEND}
+	>=dev-build/autoconf-wrapper-20231224
+	sys-devel/gnuconfig
+	!~${CATEGORY}/${P}:2.5
+"
+[[ ${PV} == 9999 ]] && BDEPEND+=" >=sys-apps/texinfo-4.3"
+
+src_prepare() {
+	if [[ ${PV} == *9999 ]] ; then
+		# Avoid the "dirty" suffix in the git version by generating it
+		# before we run later stages which might modify source files.
+		local ver=$(./build-aux/git-version-gen .tarball-version)
+		echo "${ver}" > .tarball-version || die
+
+		export WANT_AUTOCONF=2.5
+		export WANT_AUTOMAKE=1.17
+		# Don't try wrapping the autotools - this thing runs as it tends
+		# to be a bit esoteric, and the script does `set -e` itself.
+		./bootstrap || die
+	fi
+
+	# usr/bin/libtool is provided by binutils-apple, need gnu libtool
+	if [[ ${CHOST} == *-darwin* ]] ; then
+		PATCHES+=( "${FILESDIR}"/${PN}-2.71-darwin.patch )
+	fi
+
+	# Save timestamp to avoid later makeinfo call
+	touch -r doc/{,old_}autoconf.texi || die
+
+	toolchain-autoconf_src_prepare
+
+	# Restore timestamp to avoid makeinfo call
+	# We already have an up to date autoconf.info page at this point.
+	touch -r doc/{old_,}autoconf.texi || die
+}
+
+src_test() {
+	emake check TESTSUITEFLAGS="--jobs=$(get_makeopts_jobs)"
+}
+
+src_install() {
+	toolchain-autoconf_src_install
+
+	# dissuade Portage from removing our dir file
+	touch "${ED}"/usr/share/${P}/info/.keepinfodir || die
+
+	local f
+	for f in config.{guess,sub} ; do
+		ln -fs ../../gnuconfig/${f} \
+			"${ED}"/usr/share/autoconf-*/build-aux/${f} || die
+	done
+}
diff --git a/dev-build/autoconf/autoconf-9999.ebuild b/dev-build/autoconf/autoconf-9999.ebuild
index f4d209e67603a..ec41a181b6638 100644
--- a/dev-build/autoconf/autoconf-9999.ebuild
+++ b/dev-build/autoconf/autoconf-9999.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2025 Gentoo Authors
+# Copyright 1999-2026 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -11,24 +11,30 @@ EAPI=8
 if [[ ${PV} == 9999 ]] ; then
 	EGIT_REPO_URI="https://git.savannah.gnu.org/git/autoconf.git"
 	inherit git-r3
+	AUTOCONF_SLOT="9999"
 else
-	# For _beta handling replace with real version number
-	MY_PV="${PV}"
-	MY_P="${PN}-${MY_PV}"
 	#PATCH_TARBALL_NAME="${PN}-2.70-patches-01"
 
 	VERIFY_SIG_OPENPGP_KEY_PATH=/usr/share/openpgp-keys/zackweinberg.asc
 	inherit verify-sig
 
 	SRC_URI="
-		mirror://gnu/${PN}/${MY_P}.tar.xz
-		https://alpha.gnu.org/pub/gnu/${PN}/${MY_P}.tar.xz
+		mirror://gnu/${PN}/${P}.tar.xz
+		https://alpha.gnu.org/gnu/${PN}/${P}.tar.xz
 		https://meyering.net/ac/${P}.tar.xz
-		verify-sig? ( mirror://gnu/${PN}/${MY_P}.tar.xz.sig )
+		verify-sig? (
+			https://alpha.gnu.org/gnu/${PN}/${P}.tar.xz.sig
+			mirror://gnu/${PN}/${P}.tar.xz.sig
+		)
 	"
-	S="${WORKDIR}"/${MY_P}
 
-	if [[ ${PV} != *_beta* ]] && ! [[ $(ver_cut 3) =~ [a-z] ]] ; then
+	AUTOCONF_EXTRA_VER=$(ver_cut 3)
+	if [[ ${AUTOCONF_EXTRA_VER} -ge 90 ]] ; then
+		# Prereleases get no keywords and their slot bumped up
+		# e.g. SLOT for 2.72(.90) -> 2.73
+		AUTOCONF_SLOT=$(ver_cut 1).$((($(ver_cut 2) + 1)))
+	else
+		AUTOCONF_SLOT=$(ver_cut 1-2)
 		KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~arm64-macos ~x64-macos ~x64-solaris"
 	fi
 
@@ -41,7 +47,7 @@ DESCRIPTION="Used to create autoconfiguration files"
 HOMEPAGE="https://www.gnu.org/software/autoconf/autoconf.html"
 
 LICENSE="GPL-3+"
-SLOT="$(ver_cut 1-2)"
+SLOT="${AUTOCONF_SLOT}"
 
 BDEPEND+="
 	>=dev-lang/perl-5.10
diff --git a/eclass/toolchain-autoconf.eclass b/eclass/toolchain-autoconf.eclass
index 330ec45dd7d1b..f4eda613d2728 100644
--- a/eclass/toolchain-autoconf.eclass
+++ b/eclass/toolchain-autoconf.eclass
@@ -1,4 +1,4 @@
-# Copyright 1999-2024 Gentoo Authors
+# Copyright 1999-2026 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 # @ECLASS: toolchain-autoconf.eclass
@@ -102,8 +102,9 @@ toolchain-autoconf_src_install() {
 	else
 		rm -f dir || die
 
-		local major="$(ver_cut 1)"
-		local minor="$(ver_cut 2)"
+		local major="$(ver_cut 1 ${SLOT})"
+		local minor="$(ver_cut 2 ${SLOT})"
+
 		local idx="$((99999-(major*1000+minor)))"
 		newenvd - "${TC_AUTOCONF_ENVPREFIX}${PN}${idx}" <<-EOF
 		INFOPATH="${TC_AUTOCONF_INFOPATH}"
diff --git a/eclass/toolchain-funcs.eclass b/eclass/toolchain-funcs.eclass
index 3f820c2d8559d..24eba4a4f5728 100644
--- a/eclass/toolchain-funcs.eclass
+++ b/eclass/toolchain-funcs.eclass
@@ -1,4 +1,4 @@
-# Copyright 2002-2025 Gentoo Authors
+# Copyright 2002-2026 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 # @ECLASS: toolchain-funcs.eclass
@@ -1248,7 +1248,7 @@ tc-is-lto() {
 			;;
 		gcc)
 			$(tc-getCC) ${CFLAGS} -c -o "${f}" -x c - <<<"" || die
-			[[ $($(tc-getREADELF) -S "${f}") == *.gnu.lto* ]] && ret=0
+			[[ $($(tc-getOBJDUMP) -s "${f}") == *.gnu.lto* ]] && ret=0
 			;;
 	esac
 	rm -f "${f}" || die
diff --git a/sys-libs/glibc/glibc-2.41-r10.ebuild b/sys-libs/glibc/glibc-2.41-r10.ebuild
index ddf789a156c1c..eee2586a0759d 100644
--- a/sys-libs/glibc/glibc-2.41-r10.ebuild
+++ b/sys-libs/glibc/glibc-2.41-r10.ebuild
@@ -41,7 +41,7 @@ HOMEPAGE="https://www.gnu.org/software/libc/"
 if [[ ${PV} == 9999* ]]; then
 	inherit git-r3
 else
-	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86"
+	KEYWORDS="~alpha ~amd64 ~arm arm64 ~hppa ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86"
 	SRC_URI="mirror://gnu/glibc/${P}.tar.xz"
 	SRC_URI+=" https://dev.gentoo.org/~${PATCH_DEV}/distfiles/${P}-patches-${PATCH_VER}.tar.xz"
 fi