Gentoo Packages

# Copyright 1999-2026 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

PYTHON_COMPAT=( python3_{12..14} )
DISTUTILS_USE_PEP517=setuptools
inherit distutils-r1 pypi

DESCRIPTION="HDF5 Plugins for Windows, MacOS, and Linux"
HOMEPAGE="https://github.com/silx-kit/hdf5plugin"

LICENSE="GPL-3"
SLOT="0"
KEYWORDS="~amd64 ~arm64"

RDEPEND="
	>=dev-python/h5py-3.0.0[${PYTHON_USEDEP}]
"
BDEPEND="
	dev-python/py-cpuinfo[${PYTHON_USEDEP}]
	dev-python/setuptools[${PYTHON_USEDEP}]
"
DEPEND="${RDEPEND}"

src_prepare() {
	# The bundled setup.py forces -O3 for the Blosc(v1) plugin (libh5blosc),
	# overriding the user's CFLAGS. gcc-16 miscompiles c-blosc-1.21.6's
	# blosclz_compress() at -O3 (znver5), segfaulting on compress -- but ONLY
	# the blosclz codec; every other Blosc(v1) codec, Blosc2, and the other
	# filters are unaffected. Not SIMD or strict-aliasing (verified: forcing the
	# generic match path and -fno-strict-aliasing both still crash; -O2/-O1/-O0
	# are all correct). Cap that one plugin at -O2 -- negligible on a legacy
	# codec, and it then honours a normal -O2 CFLAGS too.
	# verified 2026-06-26 (gcc-16.0.0, -march=znver5)
	grep -q 'extra_compile_args += \["-O3"\]' setup.py ||
		die "blosc -O3 line gone -- upstream changed setup.py, re-audit the blosclz gcc-16 miscompile workaround"
	sed -i -e 's|extra_compile_args += \["-O3"\]|extra_compile_args += ["-O2"]|' setup.py || die
	distutils-r1_src_prepare
}