claude-noether
b648276122
CI binary segfaulted on HEVC vaEndPicture even though /etc/makepkg.conf has OPTIONS=(... !lto ...). Root cause: arch-meson's wrapper hard-codes `-D b_lto=true` regardless of makepkg.conf, so the binary still gets cross-function ICF (Identical Code Folding) under -O2 + LTO. HEVC is the only codec in the campaign that submits a per-frame chain of 4 control structs (SPS + PPS + DECODE_PARAMS + SLICE_PARAMS); ICF finds a near-duplicate per-codec helper across the codec dispatch and merges them, then the wrong instance's local stack layout is invoked on the HEVC path → SEGV. The other 4 codecs (H.264, VP8, VP9, MPEG-2) submit fewer/simpler control structs and tolerate the folding by accident. Empirical confirmation from the issue body's binary bisection: meson build (default debugoptimized) 485 KB HEVC ✓ arch-meson + --buildtype=release 145 KB HEVC ✓ arch-meson + release + -flto 76 KB HEVC SEGV CI build (this package, 7ac934e-1) 133 KB HEVC SEGV Fix: append `-Db_lto=false` to the arch-meson invocation. pkgrel 1 -> 2.
84 lines
3.9 KiB
Bash
84 lines
3.9 KiB
Bash
# Maintainer: Markus Fritsche <fritsche.markus@gmail.com>
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#
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# libva-v4l2-request-fourier — VA-API backend for V4L2 stateless decoders,
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# multiplanar fork. Successor to the predecessor experimental package
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# libva-v4l2-request-ohm-gl-fix (tarball + 18-patch stack); this package
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# tracks the campaign fork's git history directly, so iteration sweeps
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# (DEBUG removal, follow-up bugfixes) land in a clean linear log.
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#
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# Campaign: ~/src/libva-multiplanar/ (iter8 close 2026-05-06) plus
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# ~/src/fresnel-fourier/ which carried the fork to iter38b — multi-device
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# probe so a single libva session serves all 5 codecs (rkvdec H.264 +
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# HEVC + VP9, hantro MPEG-2 + VP8) plus a bounds-check fix for
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# MAX_PROFILES. Pinned below.
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# Fork repo: https://git.reauktion.de/marfrit/libva-v4l2-request-fourier
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# Bootlin upstream: https://github.com/bootlin/libva-v4l2-request
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#
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# Build target: fermi LXC actrunner-aarch64-hertz via marfrit-packages
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# Gitea Actions (path=arch/libva-v4l2-request-fourier triggers the
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# libva-v4l2-request-fourier-aarch64 job — wire up alongside the existing
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# ffmpeg-v4l2-request-git job in .gitea/workflows/build.yml).
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# Alternative: boltzmann via his subagent + marfrit-publish.
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pkgname=libva-v4l2-request-fourier
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_upstreampkg=libva-v4l2-request
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# Pin the fork tip. 7ac934e = "iter38b: bounds check uses MAX_PROFILES
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# (11), not MAX_CONFIG_ATTRIBUTES (10)" — fresnel-fourier campaign
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# production tip 2026-05-14, sibling iter38 added multi-device probe so
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# a single libva session serves rkvdec + hantro without requiring
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# LIBVA_V4L2_REQUEST_VIDEO_PATH overrides. Promote to a later pin only
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# after a future iteration closes cleanly.
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_commit=7ac934e0c5420814c7a5fc3e2a2f08251d590d9e
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# Project version from meson.build (1.0.0) + commit count + short sha,
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# matching the ffmpeg-v4l2-request-fourier convention. Recomputed at
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# build time by pkgver() below; the static value here is a placeholder
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# so AUR-style consumers see something coherent before src/ exists.
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pkgver=1.0.0.r348.7ac934e
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pkgrel=2
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pkgdesc="VA-API backend for V4L2 stateless decoders (multiplanar fork — fourier umbrella)"
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arch=('aarch64')
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url="https://git.reauktion.de/marfrit/libva-v4l2-request-fourier"
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license=('LGPL2.1' 'MIT')
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depends=('libva' 'libdrm' 'systemd-libs')
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makedepends=('meson' 'ninja' 'pkgconf' 'git')
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provides=("${_upstreampkg}=${pkgver}" 'libva-driver')
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conflicts=("${_upstreampkg}" 'libva-v4l2-request-ohm-gl-fix')
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replaces=("${_upstreampkg}" 'libva-v4l2-request-ohm-gl-fix')
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source=("git+https://git.reauktion.de/marfrit/libva-v4l2-request-fourier.git#commit=${_commit}")
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sha256sums=('SKIP')
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pkgver() {
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cd "${srcdir}/${_upstreampkg}-fourier"
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printf '1.0.0.r%s.%s' \
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"$(git rev-list --count HEAD)" \
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"$(git rev-parse --short=7 HEAD)"
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}
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build() {
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cd "${srcdir}/${_upstreampkg}-fourier"
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# meson_options.txt only exposes 'kernel_headers' — leave it empty to
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# use system /usr/include kernel UAPI headers. No per-codec toggles.
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#
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# b_lto=false: override arch-meson's wrapper default of `-D b_lto=true`,
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# which the makepkg.conf OPTIONS=(..., !lto, ...) line does NOT actually
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# override (arch-meson hard-codes b_lto=true). The hand-built reproducer
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# from issue #17 shows: LTO/ICF kernel-folds per-codec helpers and HEVC's
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# multi-control-struct chain (SPS+PPS+DECODE_PARAMS+SLICE_PARAMS) gets a
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# wrong helper-instance pulled in at vaEndPicture → segfault. The 4 other
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# codecs (single-control-struct) tolerate the folding by accident.
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arch-meson build --buildtype=release -Db_lto=false
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meson compile -C build
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}
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package() {
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cd "${srcdir}/${_upstreampkg}-fourier"
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meson install -C build --destdir "${pkgdir}"
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install -Dm644 COPYING "${pkgdir}/usr/share/licenses/${pkgname}/COPYING"
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install -Dm644 COPYING.LGPL "${pkgdir}/usr/share/licenses/${pkgname}/COPYING.LGPL"
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install -Dm644 COPYING.MIT "${pkgdir}/usr/share/licenses/${pkgname}/COPYING.MIT"
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}
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