On Thu, Jan 21, 2016 at 11:05 AM, Matthew Brett <matthew.br...@gmail.com> wrote: > Hi, > > On Thu, Jan 21, 2016 at 2:05 AM, M.-A. Lemburg <m...@egenix.com> wrote: >> On 21.01.2016 10:31, Nick Coghlan wrote: >>> On 21 January 2016 at 19:03, M.-A. Lemburg <m...@egenix.com> wrote: >>>> By using the version based approach, we'd not run into this >>>> problem and gain a lot more. >>> >>> I think it's better to start with a small core that we *know* works, >>> then expand later, rather than trying to make the first iteration too >>> wide. The "manylinux1" tag itself is versioned (hence the "1" at the >>> end), so "manylinux2" may simply have *more* libraries defined, rather >>> than newer ones. >> >> My argument is that the file based approach taken by the PEP >> is too limiting to actually make things work for a large >> set of Python packages. >> >> It will basically only work for packages that do not interface >> to other external libraries (except for the few cases listed in >> the PEP, e.g. X11, GL, which aren't always installed or >> available either). >> >> IMO, testing the versions of a set of libraries is a safer >> approach. It's perfectly fine to have a few dependencies >> not work in a module because an optional system package is not >> installed, e.g. say a package comes with UIs written in >> Qt and one in GTK. > > Please forgive my slowness, but I don't understand exactly what you > mean. Can you give a specific example? > > Say my package depends on libpng. > > Call the machine I'm installing on the client machine. > > Are you saying that, when I build a wheel, I should specify to the > wheel what versions of libpng I can tolerate on the the client > machine, and if if the client does have a compatible version, then pip > should raise an error, perhaps with a useful message about how to get > libpng?
Sorry, slowness any typos - corrected: Are you saying that, when I build a wheel, I should specify to the wheel what versions of libpng I can tolerate on the the client machine, and if the client does _not_ have a compatible version, then pip should raise an error, perhaps with a useful message about how to get libpng? Best again, Matthew _______________________________________________ Distutils-SIG maillist - Distutils-SIG@python.org https://mail.python.org/mailman/listinfo/distutils-sig
