On Oct 31, 2013, at 07:24 PM, Donald Stufft <don...@stufft.io> wrote:
On Oct 31, 2013, at 1:15 PM, Ronald Oussoren <ronaldousso...@mac.com> wrote:
Is it "just" a matter of researching if the various build options on OSX really lead to binaries with the same ABI, or is more work needed?
Basically it’s this:
I was told a wheel built on Ubuntu probably won’t work on Linux, so I shut off Linux Wheels, at the same time I asked about Windows and OSX wheels, the answers I got from people were they would generally just work on Windows, and nobody gave me a straight answer on OSX.
I can't promise anything, but I'll try to provide some documentation on what does and does not work on OSX.
From what I've seen the problem with Ubuntu wheels not working on other Linux's is due to changes in the glibc ABI (that is, code compiled with glibc X+1 might not work with glibc X), and that shouldn't be a problem on OSX.
If you build a Wheel with Homebrew Python will it work on the official OSX installers? What if I have a library installed from Homebrew? Essentially trying to figure out how likely it is that with the existing tags a wheel is going to work if we select based on them.
Again, someone (and if no-one beats me to it, I) will have to document and test the various scenarios.
The only real problem I expect is with extensions linking to shared libraries that aren't in the normal OSX install and aren't provided in the wheel. That is, a wheel for lxml that's linked with the Homebrew version of libxml2. That will only work on systems with Homebrew that have libxml2 installed.
Once we know what, if any, problems exist for the various platforms then we can come up with fixes for them. This just hasn’t been high priority for me because of PEP453 work.
To be honest the same problems likely exists on Windows, it’s just less likely and the benefits of prebuilt binaries greater.
I'm not sure about the benefits of prebuilt binaries. Apparently building universal binaries on OSX is hard for a lot of users, although I've never had problems with that. But I've written lots of cross-platform C code when cross-platform Unix code was more than just supporting osx, linux and freebsd and am therefore not a good example of a Python users just wants to build an extension that works with his Python code :-)
Ronald
P.S. sorry if this message is somewhat garbled, I'm sending this from iCloud webmail and that doesn't always work properly with mailing lists
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Donald Stufft
PGP: 0x6E3CBCE93372DCFA // 7C6B 7C5D 5E2B 6356 A926 F04F 6E3C BCE9 3372 DCFA
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