dev-util/mingw64-toolchain: new package, add 10.0.0

This package attempts to bootstrap a mingw toolchain
(binutils+gcc+mingw64-runtime) without crossdev for
easy use with wine and related packages like dxvk.

crossdev is generally intended for advanced use, and
not for a user who just want to play games (e.g. many
Blizzard games don't work without USE=mingw on wine).

Not the greatest solution, but should allow improving the
wine situation for users until there's a better option.

Signed-off-by: Ionen Wolkens <ionen@gentoo.org>

4 files changed, 326 insertions, 0 deletions

diff --git a/dev-util/mingw64-toolchain/Manifest b/dev-util/mingw64-toolchain/Manifest
new file mode 100644
index 000000000000..059c493a8601
--- /dev/null
+++ b/dev-util/mingw64-toolchain/Manifest
@@ -0,0 +1,3 @@
+DIST binutils-2.37.tar.xz 22916924 BLAKE2B f5a374fdf0300f7734d1e462333296b16c9d5ed6eba167e1742a4da7082f4388c929e286bf76c3933b3e434937380340732a31790723654b491ea0c8ab5b9ba5 SHA512 5c11aeef6935860a6819ed3a3c93371f052e52b4bdc5033da36037c1544d013b7f12cb8d561ec954fe7469a68f1b66f1a3cd53d5a3af7293635a90d69edd15e7
+DIST gcc-11.3.0.tar.xz 81141364 BLAKE2B 7e562d25446ca4ab9fe8cdb714866f66aba3744d78bf84f31bfb097c1a981e4c7f990cb1e6bcfec5ae6671836a4984e2b70eb8fed81dcef5e244f88da8623469 SHA512 f0be5ad705c73b84477128a69c047f57dd47002f375eb60e1e842e08cf2009a509e92152bca345823926d550b7395ae6d4de7db51d1ee371c2dc37313881fca7
+DIST mingw-w64-v10.0.0.tar.bz2 9620291 BLAKE2B 451372403289c492ca939d65bb4d9f6e9fa6bdd6b32d79d6438d858e106e8cc291712ada1f3f7b951a4c6908e7d0385d485ca76920af39bcf86effa48408e330 SHA512 3c0827af7c40809a867758f6cd9ef3ff0c988b43082345bf725e03949af95968d634ace99a7ffae323189549221dcb5d861de9e801f1fbc7904e446641b60516
diff --git a/dev-util/mingw64-toolchain/files/mingw64-runtime-10.0.0-tmp-files-clash.patch b/dev-util/mingw64-toolchain/files/mingw64-runtime-10.0.0-tmp-files-clash.patch
new file mode 100644
index 000000000000..38c4abf91e77
--- /dev/null
+++ b/dev-util/mingw64-toolchain/files/mingw64-runtime-10.0.0-tmp-files-clash.patch
@@ -0,0 +1,10 @@
+Fix clash when enabling lib32 and lib64 at same time, backport from:
+https://sourceforge.net/p/mingw-w64/mingw-w64/ci/953bcd32ae470c4647e94de8548dda5a8f07d82d/
+(except directly to Makefile.in to avoid autoreconf over this)
+--- a/mingw64/mingw-w64-crt/Makefile.in
++++ b/mingw64/mingw-w64-crt/Makefile.in
+@@ -153,3 +153,3 @@
+ host_triplet = @host@
+-@DLLTOOL_HAS_TEMP_PREFIX_TRUE@am__append_1 = --temp-prefix $$(basename $@ .a)
++@DLLTOOL_HAS_TEMP_PREFIX_TRUE@am__append_1 = --temp-prefix $(basename $@)
+ @DELAY_IMPORT_LIBS_TRUE@am__append_2 = --output-delaylib $@.delayimp.a
diff --git a/dev-util/mingw64-toolchain/metadata.xml b/dev-util/mingw64-toolchain/metadata.xml
new file mode 100644
index 000000000000..7a95ab69a652
--- /dev/null
+++ b/dev-util/mingw64-toolchain/metadata.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>ionen@gentoo.org</email>
+		<name>Ionen Wolkens</name>
+	</maintainer>
+	<upstream>
+		<remote-id type="cpe">cpe:/a:gnu:gcc</remote-id>
+		<remote-id type="cpe">cpe:/a:gnu:binutils</remote-id>
+		<remote-id type="sourceforge">mingw-w64</remote-id>
+	</upstream>
+</pkgmetadata>
diff --git a/dev-util/mingw64-toolchain/mingw64-toolchain-10.0.0.ebuild b/dev-util/mingw64-toolchain/mingw64-toolchain-10.0.0.ebuild
new file mode 100644
index 000000000000..1ae7b097c037
--- /dev/null
+++ b/dev-util/mingw64-toolchain/mingw64-toolchain-10.0.0.ebuild
@@ -0,0 +1,300 @@
+# Copyright 2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+MULTILIB_COMPAT=( abi_x86_{32,64} )
+inherit edo flag-o-matic multilib-build toolchain-funcs
+
+# Pick versions known to work for Wine and use vanilla for simplicity,
+# ideally update only on mingw64-runtime bumps or if there's known issues
+# (please report) to avoid rebuilding the entire toolchain too often.
+# Do _p1++ rather than revbump if changing without bumping mingw64 itself.
+BINUTILS_PV=2.37 # 2.38 needs bug #838106
+GCC_PV=11.3.0
+
+DESCRIPTION="All-in-one mingw64 toolchain intended for building Wine without crossdev"
+HOMEPAGE="
+	https://www.mingw-w64.org/
+	https://gcc.gnu.org/
+	https://sourceware.org/binutils/"
+SRC_URI="
+	mirror://sourceforge/mingw-w64/mingw-w64/mingw-w64-release/mingw-w64-v${PV}.tar.bz2
+	mirror://gnu/gcc/gcc-${GCC_PV}/gcc-${GCC_PV}.tar.xz
+	mirror://gnu/binutils/binutils-${BINUTILS_PV}.tar.xz"
+S="${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 custom-cflags debug"
+
+RDEPEND="
+	dev-libs/gmp:=
+	dev-libs/mpc:=
+	dev-libs/mpfr:=
+	sys-libs/zlib:=
+	virtual/libiconv"
+DEPEND="${RDEPEND}"
+
+PATCHES=(
+	"${FILESDIR}"/mingw64-runtime-10.0.0-tmp-files-clash.patch
+)
+
+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{-${GCC_PV},} || die
+	mv mingw-w64-v${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 # use ${T} to respect VariableScope for ${D}
+	local mwtdir=/usr/lib/${PN}
+	local prefix=${EPREFIX}${mwtdir}
+	local sysroot=${MWT_D}${prefix}
+	local -x PATH=${sysroot}/bin:${PATH}
+
+	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=${CTARGET}
+		--{doc,info,man}dir=/.skip # let individual packages handle docs
+	)
+
+	# binutils
+	local conf_binutils=(
+		--prefix="${prefix}"
+		--host=${CHOST}
+		--disable-cet
+		--disable-nls
+		--disable-shared
+		--with-system-zlib
+		--without-debuginfod
+	)
+	mwt-binutils() {
+		# replace duplicates with symlinks
+		local bin
+		for bin in "${sysroot}"/${CTARGET}/bin/*; do
+			ln -sf {../${CTARGET}/bin/,"${sysroot}"/bin/${CTARGET}-}${bin##*/} || die
+		done
+		ln -sf ld.bfd "${sysroot}"/${CTARGET}/bin/ld || die
+	}
+
+	# gcc (minimal -- if need more, disable only in stage1 / enable in stage3)
+	local conf_gcc=(
+		--prefix="${prefix}"
+		--host=${CHOST}
+		--disable-bootstrap
+		--disable-cet
+		--disable-gomp
+		--disable-libquadmath
+		--disable-libsanitizer
+		--disable-libssp
+		--disable-libvtv
+		--disable-shared
+		--with-system-zlib
+		--without-isl
+		--without-zstd
+	)
+	${multilib} || conf_gcc+=( --disable-multilib )
+
+	local conf_gcc_stage1=(
+		--enable-languages=c
+		--disable-libatomic
+		--with-sysroot="${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}"
+	)
+	mwt-gcc_stage3() {
+		# replace duplicate with symlink
+		ln -sf ${CTARGET}-gcc "${sysroot}"/bin/${CTARGET}-gcc-${GCC_PV} || die
+	}
+
+	# 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
+	)
+	mwt-mingw64_headers() { ln -s ${CTARGET} "${sysroot}"/mingw || die; } #419601
+
+	local conf_mingw64_runtime=( --with-crt )
+	${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 [[ ${1} == -x ]]; then
+			(
+				# cross-compiling, cleanup and let ./configure handle it
+				unset AR AS CC CPP CXX LD NM OBJCOPY OBJDUMP RANLIB RC STRIP
+				CHOST=${CTARGET}
+				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
+		eval '
+			local conf=( "${WORKDIR}/${1}"/configure "${conf[@]}" )
+			[[ ${conf_'${id}'@a} ]] && conf+=( "${conf_'${id}'[@]}" )
+			[[ ${2} && ${conf_'${id}_${2}'@a} ]] && conf+=( "${conf_'${id}_${2}'[@]}" )
+			conf+=( ${EXTRA_ECONF} ${MWT_'${id^^}'_CONF} )
+			[[ ${2} ]] && conf+=( ${MWT_'${1^^}_${2^^}'_CONF} )'
+
+		einfo "Building ${id}${2+ ${2}} in ${build_dir} ..."
+
+		mkdir "${build_dir}" || die
+		pushd "${build_dir}" >/dev/null || die
+
+		edo "${conf[@]}"
+		emake
+		emake 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
+	}
+
+	# 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
+				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
+
+	# 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 !debug; then
+		einfo "Stripping ${CTARGET} static libraries ..."
+		find "${sysroot}"/{,lib/gcc/}${CTARGET} -type f -name '*.a' \
+			-exec ${CTARGET}-strip --strip-unneeded {} + || die
+	fi
+}
+
+src_install() {
+	# use mv over copying given it's ~370MB
+	mv "${MWT_D}${EPREFIX}"/* "${ED}" || die
+
+	# gcc handles static libs internally without needing .la
+	find "${ED}" -type f -name '*.la' -delete || die
+}
+
+pkg_postinst() {
+	if [[ ! ${REPLACING_VERSIONS} ]]; then
+		elog "Note that this package is primarily intended for Wine and related"
+		elog "packages to depend on without needing a manual crossdev setup."
+		elog
+		elog "Settings are oriented only for what these need and simplicity."
+		elog "Please use sys-devel/crossdev for full toolchain/customization:"
+		elog "    https://wiki.gentoo.org/wiki/Mingw"
+		elog "    https://wiki.gentoo.org/wiki/Crossdev"
+	fi
+
+	local cross_gcc=cross-$(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
+}