sys-libs/zlib-ng: add 2.1.5

Signed-off-by: Sam James <sam@gentoo.org>

2 files changed, 87 insertions, 0 deletions

diff --git a/sys-libs/zlib-ng/Manifest b/sys-libs/zlib-ng/Manifest
index 76892de9c128..267262deb2b4 100644
--- a/sys-libs/zlib-ng/Manifest
+++ b/sys-libs/zlib-ng/Manifest
@@ -1,2 +1,3 @@
 DIST zlib-ng-2.1.3.tar.gz 2404446 BLAKE2B f3c93e1ed6aa6d008915a69de92d58b1646fd41ae6c97fbdab9d921fd30c7931a42cf5dccd8911d52142960174a04df54d6ab557cc7c902930fc8609c31fbee9 SHA512 cb987c0b20a11fca5361dce94e53dead7364e739a984545c38ad4bf0c7fedd83d5d62530d979eca2182da88d7507a9bec8d3f5abff41e92ab5a63ac61001502e
 DIST zlib-ng-2.1.4.tar.gz 2408377 BLAKE2B 0b5aff9671b43bda2adfc84987c6baa108fa444978d465f12516f13f32b88e6bbe52f7d3e48ff93c720229842062fe71c38ff7c1e7591e18fc7351c943fd2a6b SHA512 5afda5ea4be84f7d7b016416a6eed18e2aab6c698f006cdfbc8f8b43ce3dc73c7994ab9d1ca090c1b93cb1aadc8747bfd8216afb22b44633d49127f01b77cfa2
+DIST zlib-ng-2.1.5.tar.gz 2410601 BLAKE2B 7370ee38c05855e3a5e6976826690790adab7d68d877bf01f68969c99ad4a5fc8fd265a160e147b110969ff77ee97aab9c9d227a526d645a496eae76b2c27b04 SHA512 9212d87c63a2da4e5355a7a1c75380aeba40fbd0ea3d71d3784cb3eac94237f9bea2a1b7993a08f39d4197725c4c133087d3a9d213d3944aa48a7559de2be920
diff --git a/sys-libs/zlib-ng/zlib-ng-2.1.5.ebuild b/sys-libs/zlib-ng/zlib-ng-2.1.5.ebuild
new file mode 100644
index 000000000000..cfef9b1cc843
--- /dev/null
+++ b/sys-libs/zlib-ng/zlib-ng-2.1.5.ebuild
@@ -0,0 +1,86 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+# Worth keeping an eye on 'develop' branch upstream for possible backports,
+# as they copied this practice from sys-libs/zlib upstream.
+
+inherit cmake-multilib
+
+DESCRIPTION="Fork of the zlib data compression library"
+HOMEPAGE="https://github.com/zlib-ng/zlib-ng"
+SRC_URI="https://github.com/${PN}/${PN}/archive/${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="ZLIB"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc64 ~riscv ~x86"
+
+CPU_USE=(
+	x86_{avx2,avx512f,sse2,ssse3,sse4_2,pclmul}
+	arm_{crc32,neon}
+	ppc_{altivec,vsx2,vsx3}
+)
+IUSE="compat ${CPU_USE[@]/#/cpu_flags_} test"
+
+RESTRICT="!test? ( test )"
+
+RDEPEND="compat? ( !sys-libs/zlib )"
+
+multilib_src_configure() {
+	local mycmakeargs=(
+		-DZLIB_COMPAT=$(usex compat)
+		-DZLIB_ENABLE_TESTS=$(usex test)
+		-DWITH_GTEST=$(usex test)
+
+		# Unaligned access is controversial and undefined behaviour
+		# Let's keep it off for now
+		# https://github.com/gentoo/gentoo/pull/17167
+		-DWITH_UNALIGNED=OFF
+	)
+
+	# The intrinsics options are all defined conditionally, so we need
+	# to enable them on/off per-arch here for now.
+	# TODO: There's no s390x USE_EXPAND yet
+	if use amd64 || use x86 ; then
+		mycmakeargs+=(
+			-DWITH_AVX2=$(usex cpu_flags_x86_avx2)
+			-DWITH_AVX512=$(usex cpu_flags_x86_avx512f)
+			-DWITH_AVX512VNNI=OFF # TODO, see bug #908556
+			-DWITH_SSE2=$(usex cpu_flags_x86_sse2)
+			-DWITH_SSSE3=$(usex cpu_flags_x86_ssse3)
+			-DWITH_SSE42=$(usex cpu_flags_x86_sse4_2)
+			-DWITH_PCLMULQDQ=$(usex cpu_flags_x86_pclmul)
+			-DWITH_VPCLMULQDQ=OFF # TODO, see bug #908556
+		)
+	fi
+
+	if use arm || use arm64 ; then
+		mycmakeargs+=(
+			-DWITH_ACLE=$(usex cpu_flags_arm_crc32)
+			-DWITH_NEON=$(usex cpu_flags_arm_neon)
+		)
+	fi
+
+	if use ppc || use ppc64 ; then
+		# The POWER8 support is VSX which was introduced
+		# VSX2 was introduced with POWER8, so use that as a proxy for it
+		mycmakeargs+=(
+			-DWITH_ALTIVEC=$(usex cpu_flags_ppc_altivec)
+			-DWITH_POWER8=$(usex cpu_flags_ppc_vsx2)
+			-DWITH_POWER9=$(usex cpu_flags_ppc_vsx3)
+		)
+	fi
+
+	cmake_src_configure
+}
+
+pkg_postinst() {
+	if use compat ; then
+		ewarn "zlib-ng is experimental and replacing the system zlib is dangerous"
+		ewarn "Please be careful!"
+		ewarn
+		ewarn "The following link explains the guarantees (and what is NOT guaranteed):"
+		ewarn "https://github.com/zlib-ng/zlib-ng/blob/2.0.x/PORTING.md"
+	fi
+}