Building and installing PySide6 from source (For termux-pacman)

[dr0p-out]

I didn't dig too much into how termux-packages build system work so i decided to use this hacky setup, it was originally for myself, but here I'll share it with you guys, hope it's useful to someone

to grab source:

git clone https://code.qt.io/pyside/pyside-setup -b v6.9.0 --depth=1 --single-branch

PKGBUILD (currently for packaging into a shippable package only):

# run `makepkg -eos` to install build deps
# run `makepkg -Rf` after finishing build manually (XXX)

# you need qt6-qtbase with this patch to succeed (EDIT: already merged in termux):
# https://github.com/termux/termux-packages/pull/24897

pkgname=pyside6
pkgver=6.9.0
pkgrel=0
pkgdesc='Enable the use of Qt6 APIs in Python applications'
url='https://www.qt.io'
arch=('aarch64')
makedepends=('cmake' 'ninja' 'python-numpy' 'mesa-dev' 'libllvm-static' 'llvmgold' 'libpolly')
depends=('python' 'qt6-qtbase' 'qt6-qtdeclarative' 'mesa' 'qt6-qtsvg' 'libc++' 'clang' 'libxml2' 'libxslt')
license=(LGPL)
replaces=('shiboken6')
provides=('shiboken6')
conflicts=('shiboken6')

package() {
  DESTDIR="$pkgdir" cmake --install ../pyside-setup/build/sources/shiboken6
  DESTDIR="$pkgdir" cmake --install ../pyside-setup/build/sources/pyside6
  # TODO: also optionally install egg-info stuffs for completeness
  #       currently setup.py quits with 255
}

configure_pyside6.sh:

# DONT TOUCH ANY OF THESE UNLESS YOU KNOW WHAT YOU'RE DOING
CLANG_INSTALL_DIR=$PREFIX cmake -B build -S . -G Ninja \
  -DCMAKE_INSTALL_PREFIX=$PREFIX \
  -DCMAKE_BUILD_TYPE=Release \
  -DBUILD_TESTS=OFF -DBUILD_DOCS=no \
  -DFORCE_LIMITED_API=no -DNO_QT_TOOLS=yes \
  -DQT_REQUIRE_HOST_PATH_CHECK=FALSE \
  -DCMAKE_SYSTEM_NAME=Linux -DCMAKE_CROSSCOMPILING=NO \
  -DNUMPY_INCLUDE_DIR=$PREFIX/lib/python3.12/site-packages/numpy/_core/include \
  -DSHIBOKEN_PYTHON_LIBRARIES=-lpython3.12 --fresh

# if u see err about qexampleicon, see if this helps:
#   https://github.com/dr0p-out/termux-packages/commit/951dda6

build_pyside6.sh:

# the build may fail randomly when it's about to finish,
# popping up with internal compiler errors or segfault.
# simply continue by re-running the command and it'll work.

PYTHONPATH=$PWD/build/sources cmake --build build "$@"

# i also picked this patch from archlinux:
#  https://gitlab.archlinux.org/archlinux/packaging/packages/pyside6/-/blob/eb29bfce34497c6dba441254e6eec86bd2878fad/fix-build.patch

[dr0p-out]

screenshots:

[dr0p-out]

prebuilt pkgs:

qt6-qtbase-6.9.0-0-aarch64.pkg.tar.xz.zip (the patched pkg, necessary for build only) (EDIT: the pr is already merged in termux so just use vanilla qt6-qtbase package)

pyside6-6.9.0-0-aarch64.pkg.tar.xz.zip

technically it's possible to create a .deb package for who isn't using pacman,
maybe useful link: https://github.com/termux/termux-create-package

[dr0p-out]

okay one thing to note: i didn't try to enable all optional qt deps bcs i never needed for now

im also too lazy to create a separate shiboken6 split package

the makedepends could be imcomplete i didn't try to reproduce on a fresh installation

not sure about the ICE, maybe it will be fine when it's cross-compiled?

[dr0p-out]

by the way pip install PySide6 didn't work for me, i'm guessing it's because this Python package didn't provide any source tarball on PyPI?? because im able to produce the same error on my archlinux with pip install --no-binary :all: PySide6