diff --git a/dev-util/mingw64-toolchain/Manifest b/dev-util/mingw64-toolchain/Manifest
index 4b43188ded295..c0fff29230b51 100644
--- a/dev-util/mingw64-toolchain/Manifest
+++ b/dev-util/mingw64-toolchain/Manifest
@@ -1,3 +1,5 @@
 DIST binutils-2.44.tar.xz 27285788 BLAKE2B 0eb031ace9fb5a7047b81b5a05b1760f7d332c8ed67f98899f153a45f181b83e661a484551af05c0a9b2adc422da84619103c7b1f3c9fad5327872832b5446aa SHA512 b85d3bbc0e334cf67a96219d3c7c65fbf3e832b2c98a7417bf131f3645a0307057ec81cd2b29ff2563cec53e3d42f73e2c60cc5708e80d4a730efdcc6ae14ad7
+DIST binutils-2.45.1.tar.xz 27962312 BLAKE2B 1ccab38659ec47f9100b61322627345fe79ebd04ed0b1e872c988edded4d292d7c9ac33d9f6ea47bf265ec823dfba60da0e84374900c15ec89e3aa9280ac020c SHA512 ea030419eba387579ab717be7e3223fc99e93b586860b06003c12489f93441640d4082736f76aa5e98233db4f46e232f536a45e471486de1f5b64e1b827c167e
 DIST gcc-15.1.0.tar.xz 98268344 BLAKE2B a902ce99db4e93615879e435bcd0b96d5a16ea0af42598ca0e6d12913b2ce3651a98574c3264b2717b848e6b5a823b403ccca0adde463938d5b41aa3f1da0d34 SHA512 ddd35ca6c653dffa88f7c7ef9ee4cd806e156e0f3b30f4d63e75a8363361285cd566ee73127734cde6a934611de815bee3e32e24bfd2e0ab9f7ff35c929821c1
+DIST gcc-15.2.0.tar.xz 101056276 BLAKE2B e270320978ca690e6e8f5ef06414dc13caf561f16403a3783c76fbf3dcee57e755a2d5bba922bf7fcae0bb6120443755d819b003791ae823d54589dd799804de SHA512 89047a2e07bd9da265b507b516ed3635adb17491c7f4f67cf090f0bd5b3fc7f2ee6e4cc4008beef7ca884b6b71dffe2bb652b21f01a702e17b468cca2d10b2de
 DIST mingw-w64-v13.0.0.tar.bz2 10868704 BLAKE2B 60f041e9a03f70e78217d169dc0f892fef1be3d242237f842f09cc755e8bd8efc9586f6a05475b427dc46bdef3d30619ad33e9c959775b22e27fad7dff93c677 SHA512 39a22bd92465f571df1d90ac80b88dc6846998f71e4b7db79d1c9aa6e04cb3e41b632990a7238fc2c384ea67e4a77d103230db2c0d741869340d24ea79b6dda8
diff --git a/dev-util/mingw64-toolchain/mingw64-toolchain-13.0.0_p1.ebuild b/dev-util/mingw64-toolchain/mingw64-toolchain-13.0.0_p1.ebuild
new file mode 100644
index 0000000000000..d0aaebe85e447
--- /dev/null
+++ b/dev-util/mingw64-toolchain/mingw64-toolchain-13.0.0_p1.ebuild
@@ -0,0 +1,375 @@
+# Copyright 2022-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+MULTILIB_COMPAT=( abi_x86_{32,64} )
+inherit edo flag-o-matic multilib-build toolchain-funcs
+
+# Pick versions known to work for wine+dxvk, and avoid too frequent updates
+# due to slow rebuilds. Do _p1++ rather than revbump on changes (not using
+# Gentoo patchsets for simplicity, their changes are mostly unneeded here).
+BINUTILS_PV=2.45.1
+GCC_PV=15.2.0
+MINGW_PV=$(ver_cut 1-3)
+
+DESCRIPTION="All-in-one mingw64 toolchain intended for building Wine without crossdev"
+HOMEPAGE="
+	https://www.mingw-w64.org/
+	https://gcc.gnu.org/
+	https://sourceware.org/binutils/
+"
+SRC_URI="
+	https://downloads.sourceforge.net/mingw-w64/mingw-w64/mingw-w64-release/mingw-w64-v${MINGW_PV}.tar.bz2
+	mirror://gnu/binutils/binutils-${BINUTILS_PV}.tar.xz
+"
+if [[ ${GCC_PV} == *-* ]]; then
+	SRC_URI+=" mirror://gcc/snapshots/${GCC_PV}/gcc-${GCC_PV}.tar.xz"
+else
+	SRC_URI+="
+		mirror://gcc/gcc-${GCC_PV}/gcc-${GCC_PV}.tar.xz
+		mirror://gnu/gcc/gcc-${GCC_PV}/gcc-${GCC_PV}.tar.xz
+	"
+fi
+S=${WORKDIR}
+
+# l1:binutils+gcc, l2:gcc(libraries), l3:mingw64-runtime
+LICENSE="
+	GPL-3+
+	LGPL-3+ || ( GPL-3+ libgcc libstdc++ gcc-runtime-library-exception-3.1 )
+	ZPL BSD BSD-2 ISC LGPL-2+ LGPL-2.1+ MIT public-domain
+"
+SLOT="0"
+KEYWORDS="-* ~amd64 ~x86"
+IUSE="+abi_x86_32 +bin-symlinks custom-cflags +strip"
+
+RDEPEND="
+	dev-libs/gmp:=
+	dev-libs/mpc:=
+	dev-libs/mpfr:=
+	virtual/libiconv
+	virtual/zlib:=
+	bin-symlinks? (
+		abi_x86_64? (
+			!cross-x86_64-w64-mingw32/binutils
+			!cross-x86_64-w64-mingw32/gcc
+		)
+		abi_x86_32? (
+			!cross-i686-w64-mingw32/binutils
+			!cross-i686-w64-mingw32/gcc
+		)
+	)
+"
+DEPEND="${RDEPEND}"
+
+QA_CONFIG_IMPL_DECL_SKIP=(
+	strerror_r # libstdc++ test using -Wimplicit+error
+)
+
+pkg_pretend() {
+	[[ ${MERGE_TYPE} == binary ]] && return
+
+	tc-is-cross-compiler &&
+		die "cross-compilation of the toolchain itself is unsupported"
+}
+
+src_prepare() {
+	# rename directories to simplify both patching and the ebuild
+	mv binutils{-${BINUTILS_PV},} || die
+	mv gcc{-${GCC_PV},} || die
+	mv mingw-w64-v${MINGW_PV} mingw64 || die
+
+	default
+}
+
+src_compile() {
+	# not great but do everything in src_compile given bootstrapping
+	# process needs to be done in steps of configure+compile+install
+	# (done modular to have most package-specific things in one place)
+
+	CTARGET=$(usex x86 i686 x86_64)-w64-mingw32
+
+	MWT_D=${T}/root # moved to ${D} in src_install
+	local mwtdir=/usr/lib/${PN}
+	local prefix=${EPREFIX}${mwtdir}
+	local sysroot=${MWT_D}${prefix}
+	local -x PATH=${sysroot}/bin:${PATH}
+
+	filter-lto # requires setting up, and may be messy with mingw static libs
+	use custom-cflags || strip-flags # fancy flags are not realistic here
+
+	local multilib=false
+	use abi_x86_32 && use abi_x86_64 && multilib=true
+
+	# global configure flags
+	local conf=(
+		--build=${CBUILD:-${CHOST}}
+		--target=${CTARGET}
+		--{doc,info,man}dir=/.skip # let the real binutils+gcc handle docs
+		MAKEINFO=: #922230
+	)
+
+	# binutils
+	local conf_binutils=(
+		--prefix="${prefix}"
+		--host=${CHOST}
+		--disable-cet
+		--disable-default-execstack
+		--disable-nls
+		--disable-shared
+		--with-system-zlib
+		--without-debuginfod
+		--without-msgpack
+		--without-xxhash
+		--without-zstd
+	)
+	mwt-binutils() {
+		# symlink gcc's lto plugin for AR (bug #854516)
+		ln -s ../../libexec/gcc/${CTARGET}/${GCC_PV%%[.-]*}/liblto_plugin.so \
+			"${sysroot}"/lib/bfd-plugins || die
+	}
+
+	# gcc (minimal -- if need more, disable only in stage1 / enable in stage3)
+	local conf_gcc=(
+		--prefix="${prefix}"
+		--host=${CHOST}
+		--disable-bootstrap
+		--disable-cet
+		--disable-gcov #843989
+		--disable-gomp
+		--disable-libquadmath
+		--disable-libsanitizer
+		--disable-libssp
+		--disable-libvtv
+		--disable-shared
+		--disable-werror
+		--with-gcc-major-version-only
+		--with-system-zlib
+		--without-isl
+		--without-zstd
+	)
+	${multilib} || conf_gcc+=( --disable-multilib )
+	# libstdc++ may misdetect sys/sdt.h on systemtap-enabled system and fail
+	# (not passed in conf_gcc above given it is lost in sub-configure calls)
+	local -x glibcxx_cv_sys_sdt_h=no
+
+	local conf_gcc_stage1=(
+		--enable-languages=c
+		--disable-libatomic
+		--with-sysroot="${sysroot}"
+	)
+	local -n conf_gcc_stage2=conf_gcc_stage1
+
+	local conf_gcc_stage3=(
+		--enable-languages=c,c++
+		--enable-threads=posix # needs stage3, and is required for dxvk/vkd3d
+		--with-sysroot="${prefix}"
+		--with-build-sysroot="${sysroot}"
+	)
+
+	# mingw64-runtime (split in several parts, 3 needed for gcc stages)
+	local conf_mingw64=(
+		--prefix="${prefix}"/${CTARGET}
+		--host=${CTARGET}
+		--with-sysroot=no
+		--without-{crt,headers}
+
+		# mingw .dll aren't used by wine and packages wouldn't find them
+		# at runtime, use crossdev if need dll and proper search paths
+		--disable-shared
+	)
+
+	local conf_mingw64_headers=(
+		--enable-idl
+		--with-headers
+
+		# ucrt has not been tested and migration needs looking into, force
+		# msvcrt-os for now (if really want this either use crossdev or
+		# override using MWT_MINGW64_{HEADERS,RUNTIME}_CONF=... env vars)
+		--with-default-msvcrt=msvcrt-os
+	)
+	mwt-mingw64_headers() { ln -s ${CTARGET} "${sysroot}"/mingw || die; } #419601
+
+	local conf_mingw64_runtime=(
+		--with-crt
+		--with-default-msvcrt=msvcrt-os # match with headers
+	)
+	${multilib} ||
+		conf_mingw64_runtime+=( $(usex x86 --disable-lib64 --disable-lib32 ) )
+
+	local conf_mingw64_libraries=( --with-libraries )
+	local conf_mingw64_libraries32=(
+		--libdir="${prefix}"/${CTARGET}/lib32
+		--with-libraries
+		CC="${CTARGET}-gcc -m32"
+		RCFLAGS="--target=pe-i386 ${RCFLAGS}"
+	)
+
+	# mingw64-runtime's idl compiler (useful not to depend on wine for widl)
+	local conf_widl=( --prefix="${prefix}" )
+
+	# mwt-build [-x] <path/package-name> [stage-name]
+	# -> ./configure && make && make install && mwt-package() && mwt-package_stage()
+	# passes conf, conf_package, and conf_package_stage arrays to configure, and
+	# users can add options through environment with e.g.
+	#	MWT_BINUTILS_CONF="--some-option"
+	#	MWT_GCC_STAGE1_CONF="--some-gcc-stage1-only-option"
+	#	MWT_WIDL_CONF="--some-other-option"
+	#	EXTRA_ECONF="--global-option" (generic naming for if not reading this)
+	mwt-build() {
+		if [[ ${1} == -x ]]; then
+			(
+				# cross-compiling, cleanup and let ./configure handle it
+				unset AR AS CC CPP CXX DLLTOOL LD NM OBJCOPY OBJDUMP RANLIB RC STRIP
+				CHOST=${CTARGET}
+				filter-flags '-fuse-ld=*'
+				filter-flags '-mfunction-return=thunk*' #878849
+
+				# support for stack-protector is still new and experimental
+				# for mingw and issues can also be harder to debug + fix for
+				# upstreams using it, if feeling concerned about security
+				# would advise to either not use wine or at least contain it
+				use custom-cflags || filter-flags '-fstack-protector*' #931512
+
+				# some bashrc-mv users tend to do CFLAGS="${LDFLAGS}" and then
+				# strip-unsupported-flags miss these during compile-only tests
+				# (primarily done for 23.0 profiles' -z, not full coverage)
+				filter-flags '-Wl,-z,*'
+
+				# -mavx with mingw-gcc has a history of obscure issues and
+				# disabling is seen as safer, e.g. `WINEARCH=win32 winecfg`
+				# crashes with -march=skylake >=wine-8.10, similar issues with
+				# znver4: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110273
+				append-flags -mno-avx
+
+				strip-unsupported-flags
+				mwt-build "${@:2}"
+			)
+			return
+		fi
+
+		local id=${1##*/}
+		local build_dir=${WORKDIR}/${1}${2+_${2}}-build
+
+		# econf is not allowed in src_compile and its defaults are
+		# mostly unused here, so use configure directly
+		local conf=( "${WORKDIR}/${1}"/configure "${conf[@]}" )
+
+		local -n conf_id=conf_${id} conf_id2=conf_${id}_${2}
+		[[ ${conf_id@a} == *a* ]] && conf+=( "${conf_id[@]}" )
+		[[ ${2} && ${conf_id2@a} == *a* ]] && conf+=( "${conf_id2[@]}" )
+
+		local -n extra_id=MWT_${id^^}_CONF extra_id2=MWT_${id^^}_${2^^}_CONF
+		conf+=( ${EXTRA_ECONF} ${extra_id} ${2+${extra_id2}} )
+
+		einfo "Building ${id}${2+ ${2}} in ${build_dir} ..."
+
+		mkdir -p "${build_dir}" || die
+		pushd "${build_dir}" >/dev/null || die
+
+		edo "${conf[@]}"
+		emake MAKEINFO=: V=1
+		# -j1 to match bug #906155, other packages may be fragile too
+		emake -j1 MAKEINFO=: V=1 DESTDIR="${MWT_D}" install
+
+		declare -f mwt-${id} >/dev/null && edo mwt-${id}
+		declare -f mwt-${id}_${2} >/dev/null && edo mwt-${id}_${2}
+
+		popd >/dev/null || die
+	}
+
+	# workaround race condition with out-of-source crt build (bug #879537)
+	mkdir -p mingw64_runtime-build/mingw-w64-crt/lib{32,64} || die
+
+	# build with same ordering that crossdev would do + stage3 for pthreads
+	mwt-build binutils
+	mwt-build mingw64 headers
+	mwt-build gcc stage1
+	mwt-build -x mingw64 runtime
+	mwt-build gcc stage2
+	${multilib} && mwt-build -x mingw64 libraries32
+	mwt-build -x mingw64 libraries
+	mwt-build gcc stage3
+	mwt-build mingw64/mingw-w64-tools/widl
+	# note: /could/ system-bootstrap if already installed, but gcc and
+	# libraries will use the system's older mingw64 headers/static-libs
+	# and make this potentially fragile without more workarounds/stages
+
+	if ${multilib}; then
+		# Like system's gcc, `x86_64-w64-mingw32-gcc -m32` can build for x86,
+		# but packages expect crossdev's i686-w64-mingw32-gcc which is the same
+		# just without 64bit support and would rather not build the toolchain
+		# twice. Dirty but wrap to allow simple interoperability with crossdev.
+		mwt-i686_wrapper() {
+			printf "#!/usr/bin/env sh\nexec \"${prefix}/bin/${bin}\" ${*} "'"${@}"\n' \
+				> ${bin32} || die
+			chmod +x ${bin32} || die
+		}
+		pushd "${sysroot}"/bin >/dev/null || die
+		local bin bin32
+		for bin in ${CTARGET}-*; do
+			bin32=${bin/x86_64-w64/i686-w64}
+			case ${bin#${CTARGET}-} in
+				as) mwt-i686_wrapper --32;;
+				cpp|gcc|gcc-${GCC_PV%%[.-]*}|g++|widl) mwt-i686_wrapper -m32;;
+				ld|ld.bfd) mwt-i686_wrapper -m i386pe;;
+				windres) mwt-i686_wrapper --target=pe-i386;;
+				*) ln -s ${bin} ${bin32} || die;;
+			esac
+		done
+		popd >/dev/null || die
+	fi
+
+	if use bin-symlinks; then
+		mkdir -p -- "${MWT_D}${EPREFIX}"/usr/bin/ || die
+		local bin
+		for bin in "${sysroot}"/bin/*; do
+			ln -rs -- "${bin}" "${MWT_D}${EPREFIX}"/usr/bin/ || die
+		done
+	fi
+
+	# portage doesn't know the right strip executable to use for CTARGET
+	# and it can lead to .a mangling, notably with 32bit (breaks toolchain)
+	dostrip -x ${mwtdir}/{${CTARGET}/lib{,32},lib/gcc/${CTARGET}}
+
+	# ... and instead do it here given this saves ~60MB
+	if use strip; then
+		einfo "Stripping ${CTARGET} static libraries ..."
+		find "${sysroot}"/{,lib/gcc/}${CTARGET} -type f -name '*.a' \
+			-exec ${CTARGET}-strip --strip-unneeded {} + || die
+	fi
+}
+
+src_install() {
+	mv -- "${MWT_D}${EPREFIX}"/* "${ED}" || die
+
+	find "${ED}" -type f -name '*.la' -delete || die
+}
+
+pkg_postinst() {
+	use bin-symlinks && has_version dev-util/shadowman && [[ ! ${ROOT} ]] &&
+		eselect compiler-shadow update all
+
+	if [[ ! ${REPLACING_VERSIONS} ]]; then
+		elog "Note that this package is primarily intended for Wine and related"
+		elog "packages to depend on without needing a manual crossdev setup."
+		elog
+		elog "Settings are oriented only for what these need and simplicity."
+		elog "Use sys-devel/crossdev if need full toolchain/customization:"
+		elog "    https://wiki.gentoo.org/wiki/Mingw"
+		elog "    https://wiki.gentoo.org/wiki/Crossdev"
+	fi
+
+	local cross_gcc=cross-$(usex x86 i686 x86_64)-w64-mingw32/gcc
+	if has_version ${cross_gcc}; then
+		# encourage cleanup given users may not realize if switch by default
+		ewarn "${cross_gcc} is installed, note that ${PN}"
+		ewarn "is redundant with the *-w64-mingw32/{binutils,gcc,mingw64-runtime}"
+		ewarn "packages and optionally only one needs to be kept."
+	fi
+}
+
+pkg_postrm() {
+	use bin-symlinks && has_version dev-util/shadowman && [[ ! ${ROOT} ]] &&
+		eselect compiler-shadow clean all
+}