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