On Wed, Mar 25, 2026 at 9:51 AM Böszörményi Zoltán <[email protected]> wrote:
> 2026. 03. 25. 14:17 keltezéssel, Bruce Ashfield írta: > > > > > > On Wed, Mar 25, 2026 at 9:13 AM Böszörményi Zoltán <[email protected]> > wrote: > > > > 2026. 03. 25. 14:01 keltezéssel, Bruce Ashfield írta: > > > > > > > > > On Wed, Mar 25, 2026 at 7:31 AM Zoltan Boszormenyi via > lists.openembedded.org > > <http://lists.openembedded.org> > > > <http://lists.openembedded.org> <zboszor= > [email protected]> wrote: > > > > > > This patchset allows turning on Python freethreading by using > > > a new DISTRO_FEATURES setting: > > > > > > DISTRO_FEATURES += "python_freethreading" > > > > > > and optionally: > > > > > > DISTRO_FEATURES_NATIVE += "python_freethreading" > > > > > > The change to python3-dir.bbclass is crucial, as all python > module > > > build helper classes rely on it. > > > > > > I also added native variants of some settings because another > > > series against meta-openembedded is needed to complete this > one. > > > In that, the change to the fontforge recipe relies on the > native > > > setting for setting BUILD_LDFLAGS. > > > > > > > > > Looking at those other patches in the series, they don't seem to > > > be conditional on the distro feature. > > > > > > Are those changes valid for a build with and without freethreading > ? > > > > Yes! > > > > The main change is in python3-dir.bbclass, and the recipe tweaks > > are just adaptations to the fact that only ${PYTHON_DIR} is needed, > > not ${PYTHON_DIR}${PYTHON_ABI} from that point. > > > > I was thinking that the introductory mail stressed this enough. > > > > > > Obviously not :) > > Obviously. :) > > > I didn't get that impression at all from reading the introductory > > message or looking at the patches themselves. > > > > You have the overview knowledge of the feature, why it is > > useful, how it impacts existing recipes, how the migration would > > work, what is the compatibility, etc. > > I think the Python 3.14 release notes has enough details. > See also https://www.phoronix.com/news/Python-3.14 The information needs to be distilled into your commit, not left to the patch reader to go off and read release notes. That's the point I'm trying to make. > > > With the two series I sent, only a single recipe is left (cmpi-bindings) > in openembedded-core and meta-openembedded that uses > the PYTHON_ABI setting explicitly. > > Migration (of python scripts) should not be a problem. > If it worked with 3.14 as is, it works with freethreading enabled. > > Compatibility is poor for a lot of modules, that clearly spell this out > in their pyproject.toml or PKG-INFO: > > "Programming Language :: Python :: Free Threading :: 1 - Unstable" > > or something not quite production level support. > It's still experimental for 3rd party modules, despite being officially > supported for the interpreter and built-in modules in 3.14. > > This is the reason this was an RFC series. > > Anyway, the reason I was experimenting with this was that > with heavily threaded python code, an import storm can cause > a crash in 3.12.11 or the manually updated 3.13.12 in Yocto 5.3 in > importlib._bootstrap according to the backtrace. > > I would like to see if Python 3.14 (with and without freethreading) > fixes such crashes. > Definitely worth putting in the RFC as well, the motivation for the change matters! > > > The patch reader doesn't, so that all needs to be clearly > > supplied. > > Maybe next time for v2 after I have a complete image > successfully built with freethreading enabled. > Ack'd Bruce > > > > > Bruce > > > > > > > > FWIW, less than 30 recipes was spelling the latter out in > > openembedded-core and meta-openembedded combined. > > > > > That's the type of information, along with the benefits of enabling > > > this would be information expected in a 0/N introductory patch. > > > > > > Cheers, > > > > > > Bruce > > > > > > > > > All of the changes included here were successfully build > tested, > > > except for the gdb-cross-canadian change. That one failed, but > > > it's included for completeness. > > > > > > Quite a few of python modules were build tested for native and > > > target builds, including python3-pytorch from my meta-python-ai > > > with reduced RDEPENDS because e.g. python3-onnx there failed > > > to build with freethreading enabled. > > > > > > All in all, this series at least allows to get things going. > > > Though maybe not for Yocto 6.0, as it's quite late. > > > > > > Best regards, > > > Zoltán Böszörményi > > > > > > > > > > > > > > > > > > -- > > > - Thou shalt not follow the NULL pointer, for chaos and madness > await thee at its end > > > - "Use the force Harry" - Gandalf, Star Trek II > > > > > > > > > > > -- > > - Thou shalt not follow the NULL pointer, for chaos and madness await > thee at its end > > - "Use the force Harry" - Gandalf, Star Trek II > > > > -- - Thou shalt not follow the NULL pointer, for chaos and madness await thee at its end - "Use the force Harry" - Gandalf, Star Trek II
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