I wish i was doing python development during the PowerPC->Intel transition.
I was in high school and into macs but not python at the time.
On Wed, Jan 12, 2022 at 4:48 PM <jack.jan...@cwi.nl> wrote:
>
> On 12 Jan 2022, at 22:54, Ned Deily <n...@python.org> wrote:
>
> In theory it is possible to select which architecture a multi-arch
> executable is to run under when there is more than one option by using the
> "arch" command, like here to force running in Intel emulation mode under
> Rosetta2 on an M1 Mac:
>
> arch -x86_64 /path/to/python3{x}
>
> But there is a big gotcha with that: if anything running under that
> non-default arch Python spins off another Python in a subprocess by using
> the value of sys.executable to find the running interpreter binary, the
> "arch -x86_64" is effectively lost and the interpreter in the subprocess
> will run in the default architecture. This happens, for instance, when
> running Python's own test suite: the top-level Python process running
> regrtest will be running in Intel emulation but tests running in
> subprocesses will still be running in the default arm64 arch, possibly
> giving errors or silently producing misleading results. Running the tests
> using python3{}-intel64 avoids that problem.
>
>
> Yeah, that’s why I’m staying away from universal builds for now. Often I
> have a situation where I run cmake which runs make which runs python to
> create a venv and then somebody higher up will use that venv to create
> something using “python" that something else will then use to build
> something against. The chances of this working with “arch -x86_64” are
> slim, if that:-)
>
> Looking at the timeline of the PowerPC->Intel transition I think most of
> the problem will be solved in another year, because pretty much everything
> will be available for arm natively.
>
> --
>
> Jack Jansen, <jack.jan...@cwi.nl>, http://www.cwi.nl/~jack
>
> If I can't dance I don't want to be part of your revolution -- Emma Goldman
>
>
>
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