media-libs/libsdl2: add 2.32.54 (aka sdl2-compat, unkeyworded)

For testing, looking at the upstream issue tracker it is probably
still early to have it replace libsdl2 entirely (there's also the
qemu static-libs issue, see ebuild comment) but should work in most
cases nonetheless.

Feel free to opt-in and ideally report issues to sdl's upstream
rather than Gentoo unless it looks like a packaging issue (which
may well exist, not tested much yet).

wrt versions, to clarify, >=x.y.50 are sdl2-compat while <x.y.50
is normal libsdl2. There could be a 2.34.0 and 2.34.50 or so in
the future, so compat is not necessarily *all* >=2.32.50.

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

media-libs/libsdl2/Manifest

@@ -2,3 +2,4 @@ DIST SDL2-2.30.11.tar.gz 7585207 BLAKE2B e6038cbf79bec299fae9cfdc4b84ff3e28343ab
 DIST SDL2-2.30.7.tar.gz 7525092 BLAKE2B a494ca856f43009957f62ef4e5d401777c2d1f8518e4cc1a1b9fc9a2efedc5031b9cb5e2965aeb7347821310153cf3abc4c898dd493962fb268c5c55081ed7c3 SHA512 1a16c10f500dea97bd4e4ca5f560fe4ab8e746c975d30751b7cf567868743d105ce84055d480e4c18b290adac485e67d1bb14ae1719644d6e42223d96f299a16
 DIST SDL2-2.32.0.tar.gz 7625288 BLAKE2B 491796e2b222a49eaead76e60bb6e58bed881667cc61d0ba81ed0e083134b6b13089ca2c4658f6576b2924ddeaffcc9ff5c7532841e7b0797c6bd1769ad74a53 SHA512 a91b8105125f06118e8bfce2a5553fe053f7158dd02f06a36cfc535f09c401eb7da11072e576c6bf6e41fa2e02b08483b9cc4e11c658578b762e1b6c326a45bb
 DIST SDL2-2.32.2.tar.gz 7627192 BLAKE2B 5ea13fe60f2388e2ff61f60413ec71be84a429b6b2dbcb98bee8bf59e931396e164347288c68453e2932d9201fc8e53907cfe2fa0e456ae0383edaefa901df9b SHA512 9a608974a69b97fd5589bf8feed4742498f8f07731bcd5b99dd518089acda8b9b4216197b6adf7ca79ef1a9fe47c542033eefe94763e66229b1d9ba5207da5c5
+DIST sdl2-compat-2.32.54.tar.gz 2816984 BLAKE2B 71b28567f0039c1833f3b80f0bc9d025d08d3dc0bc9fe688e18e38064c2ee84149f6e7b66c04004c1d63fd18d141ca2d0a20280a72b12d48fa0f5976a9100cd5 SHA512 857aee92ab78692b9d9fb1734ee8d0bd59cff6d427a4aef8406e98858182299420d1f129676ad9a939e2b263fe7c78991a0a9ff955bae920f5530919a1f9a0ea

media-libs/libsdl2/libsdl2-2.32.54.ebuild

@@ -0,0 +1,43 @@
+# Copyright 2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit cmake-multilib
+
+DESCRIPTION="Simple Direct Media Layer 2 compatibility wrapper around SDL3"
+HOMEPAGE="https://www.libsdl.org/"
+SRC_URI="https://www.libsdl.org/release/sdl2-compat-${PV}.tar.gz"
+S=${WORKDIR}/sdl2-compat-${PV}
+
+LICENSE="ZLIB"
+SLOT="0"
+# unkeyworded for testing
+#KEYWORDS="~amd64"
+# this skips most non-compat libsdl2 former IUSE that are not used by revdeps,
+# albeit reason that some depend on 'alsa' for should probably be reviewed
+# (static-libs left out because it is useless for the app-emulation/qemu
+# use case given static sdl2-compat dlopens the shared libsdl3 anyway)
+#
+# TODO: either update revdeps to have (+) on no-op IUSE (haptic, joystick,
+# sound, and video) then cleanup, or don't for less overlay issues and instead
+# force in profiles to avoid unnecessary rebuilds -- not forced right now given
+# >=2.32.50 would force for a potential future non-compat 2.34.0 fwiw
+IUSE="X alsa gles2 +haptic +joystick kms opengl +sound test +video vulkan wayland"
+REQUIRED_USE="gles2? ( opengl )"
+RESTRICT="!test? ( test )"
+
+# libsdl3 is dlopen'ed and USE at build time should not matter, it enables
+# everything but will not work without libsdl3 support at runtime
+RDEPEND="
+	media-libs/libsdl3[X?,alsa?,opengl?,vulkan?,wayland?,${MULTILIB_USEDEP}]
+"
+DEPEND="${RDEPEND}"
+
+src_configure() {
+	local mycmakeargs=(
+		-DSDL2COMPAT_TESTS=$(usex test)
+	)
+
+	cmake-multilib_src_configure
+}