Name:           python-hdf5plugin
Version:        6.0.0
Release:        3%{?dist}
Summary:        HDF5 Plugins for Windows, MacOS, and Linux

License:        MIT
URL:            https://github.com/silx-kit/hdf5plugin
Source0:        %pypi_source hdf5plugin

BuildRequires:  python3-devel
BuildRequires:  python3-setuptools
BuildRequires:  python3-wheel
BuildRequires:  python3-pip
BuildRequires:  python3-cpuinfo
BuildRequires:  hdf5-devel
BuildRequires:  gcc

%description
The hdf5plugin package provides HDF5 compression filters (plugins) for h5py
and PyTables.

%package -n python3-hdf5plugin
Summary:        %{summary}
Requires:       python3-h5py

%description -n python3-hdf5plugin
The hdf5plugin package provides HDF5 compression filters (plugins) for h5py
and PyTables.

%prep
%autosetup -n hdf5plugin-%{version}

%build
# HDF5PLUGIN_NATIVE=False: upstream compiles the bundled filter plugins for the
# BUILD MACHINE's CPU, and ships the result to every user of the arch.
#
# setup.py:155 sets native_compile_args = ("-mcpu=native",) for ARM_8 (and
# "-march=native" for X86_64 at :153). use_native defaults to has_native(),
# which is simply "does the compiler accept the flag" -- always true -- so the
# option is ON unless this variable says otherwise.
#
# Measured, not inferred. python3-hdf5plugin-6.0.0-2.fc44.aarch64 SIGILLs on
# `import hdf5plugin`, on a Cortex-A76 (ARMv8.2, no PAC in /proc/cpuinfo
# Features). Under gdb:
#
#   Program received signal SIGILL, Illegal instruction.
#   0x...3d4 in init_filter () from .../hdf5plugin/plugins/libh5bshuf.so
#   => 0x...3d4 <init_filter+1300>:  retaa
#
# retaa is ARMv8.3 Pointer Authentication. Critically it is NOT in the NOP hint
# space -- paciasp/autiasp are, and execute harmlessly on older cores, which is
# why Fedora's -mbranch-protection=standard is safe everywhere. retaa/braa/blraa
# are real encodings and trap as undefined on any pre-8.3 CPU.
#
# objdump across the shipped objects, with libc as the control:
#
#   object                PAC-only (retaa/braa)   hint-space (paciasp/autiasp)
#   libc.so.6                    0                        7588
#   libh5bshuf.so              737                         824
#   libh5blosc.so              891                         936
#   libh5blosc2.so            1641                        1709
#   libh5sz.so                1513                        2010
#   libh5zstd.so               596                         593
#   libh5zfp.so                407                         466
#   libh5bzip2.so               94                         124
#   libh5lz4.so                 94                         147
#
# All eight bundled plugins; zero in libhdf5, libz or h5py's own modules. libc
# is the shape a correct baseline build has: PAC hints, no PAC-only encodings.
#
# This is invisible to every gate we have. The package builds green, its
# metadata is consistent, and it passes a depsolve -- it only dies when
# something imports it, on hardware older than the builder. ci/import-probe.sh
# is what caught it.
#
# x86_64 has the SAME mechanism (-march=native at setup.py:153) and would ship
# whatever ISA the builder happened to have. I have NOT measured an x86_64
# failure, so this disables only the host-keyed flag and deliberately leaves
# HDF5PLUGIN_SSE2/SSSE3/AVX2 alone -- those are separate knobs I have not
# tested, and blosc does some runtime dispatch.
export HDF5PLUGIN_NATIVE=False
%pyproject_wheel

%install
%pyproject_install

%files -n python3-hdf5plugin
%license LICENSE
%doc README.rst
%{python3_sitearch}/hdf5plugin
%{python3_sitearch}/hdf5plugin-%{version}.dist-info

%changelog
* Tue Sep 29 2026 Morgan Hough <morgan.hough@gmail.com> - 6.0.0-3
- Build with HDF5PLUGIN_NATIVE=False. 6.0.0-2 on aarch64 installs cleanly and
  then SIGILLs on `import hdf5plugin`: upstream compiles the bundled filter
  plugins with -mcpu=native, so the COPR builder's ISA is baked into what every
  aarch64 user gets. The faulting instruction is `retaa` in libh5bshuf.so's
  init_filter -- ARMv8.3 Pointer Authentication, which unlike paciasp/autiasp
  is NOT in the NOP hint space and traps on any pre-8.3 core. That includes
  Cortex-A76, so Raspberry Pi 5 and most non-server ARM hardware. All eight
  bundled plugins carry PAC-only encodings; libc, libhdf5, libz and h5py carry
  none. See the %%build comment for the measurements.
- Found by ci/import-probe.sh, which is the only gate that could have: the
  package builds green, its metadata is consistent and it passes a depsolve.
* Wed Jun 10 2026 Morgan Hough <morgan.hough@gmail.com> - 6.0.0-2
- Rebuild for rawhide's Python 3.15 transition (the -1 build required
  python(abi)=3.14, blocking rawhide consumers such as python-babelviscofdtd).
  Release bump so the py3.15 build cleanly supersedes the stale -1 in copr_base.

* Sun Feb 01 2026 Morgan Hough <morgan.hough@gmail.com> - 6.0.0-1
- Initial package