games-emulation/zsnes: add 2.2.1

Not looked in-depth but seems some code was shifted around
from asm to C and it introduced new issues with strict-aliasing
lto assuming they weren't already there. Not verified given old
version fails to build wrt bug #979230, preasumably caused
by newer nasm, and is fixed in this one.

Closes: https://bugs.gentoo.org/979230
Signed-off-by: Ionen Wolkens <ionen@gentoo.org>

games-emulation/zsnes/Manifest

@@ -1 +1,2 @@
 DIST zsnes-2.1.1.tar.gz 1211001 BLAKE2B 7f40305c86adf80dc6f4bec24dbb82929abc8d4dac54cb81693f9e74968a7300c88b99122cd32abea1bd3b91f0476925433581734e446a9d7b61cfc2e6359fe8 SHA512 10e71c5f9bcebf889625696f6f83a40cb7529291f3ef37113ddf8c0f231e199e6d4ca48274a4bee54996290ec9cf119b9ffc90c0df316da0097df18a043529af
+DIST zsnes-2.2.1.tar.gz 1241244 BLAKE2B 28f6f5b9acffd6109f30fbed1952866ed7952679124e7d39bd6e2004a53f3124b984489c848965fdaa882b1f488fd35259d22d6cdf3bd6cf5ce7bafb2bc5f5a1 SHA512 599fe81b296e00ad47158d57fc1d844ebd58639054b4d39c3a961bb8c9a057c1132b2dd9c5476bccb96da7bd5cf54073e76db54e2cb0a75d080ade73e3795214

games-emulation/zsnes/zsnes-2.2.1.ebuild

@@ -0,0 +1,72 @@
+# Copyright 2021-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{12..14} )
+inherit flag-o-matic multilib python-any-r1 toolchain-funcs xdg
+
+DESCRIPTION="Fork of the classic Super Nintendo emulator"
+HOMEPAGE="https://github.com/xyproto/zsnes/ https://www.zsnes.com/"
+SRC_URI="
+	https://github.com/xyproto/zsnes/archive/refs/tags/${PV}.tar.gz
+		-> ${P}.tar.gz
+"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="-* ~amd64 ~x86"
+IUSE="ao custom-cflags pipewire"
+
+RDEPEND="
+	media-libs/libglvnd[X,abi_x86_32(-)]
+	media-libs/libpng:=[abi_x86_32(-)]
+	media-libs/libsdl3[abi_x86_32(-),opengl]
+	virtual/zlib:=[abi_x86_32(-)]
+	ao? ( media-libs/libao[abi_x86_32(-)] )
+	pipewire? (  media-video/pipewire:=[abi_x86_32(-)] )
+"
+DEPEND="${RDEPEND}"
+BDEPEND="
+	${PYTHON_DEPS}
+	dev-lang/nasm
+	virtual/pkgconfig
+	virtual/zlib:=
+"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-2.1.0-cc-quotes.patch
+)
+
+src_compile() {
+	# Makefile forces many CFLAGS that are questionable, but zsnes' ancient x86
+	# asm is fragile, not pic safe (bug #427104), broken by F_S=3 (formerly
+	# broken with =2 as well), and can be affected by -march=* and similar.
+	# Stick to upstream's choices, this is non-portable either way.
+	if use !custom-cflags; then
+		strip-flags
+		append-cppflags -U_FORTIFY_SOURCE # to disable =3, Makefile enables =2
+
+		# furthermore fails with -Werror=strict-aliasing+lto-type-mismatch
+		append-cflags -fno-strict-aliasing
+		filter-lto
+	fi
+
+	use amd64 && multilib_toolchain_setup x86
+	tc-export CC
+	append-cflags ${CPPFLAGS}
+
+	ZSNES_MAKEARGS=(
+		ARCH=LINUX
+		PREFIX="${EPREFIX}"/usr
+		WITH_AO=$(usex ao)
+		WITH_PIPEWIRE=$(usex pipewire)
+	)
+
+	emake "${ZSNES_MAKEARGS[@]}"
+}
+
+src_install() {
+	emake "${ZSNES_MAKEARGS[@]}" DESTDIR="${D}" install
+	einstalldocs
+}