iOS Builds

[Treata11]

Greetings,

I noticed that the project's CMake version is set to 3.15, which should be sufficient for Apple platform builds.
But I took a look at the source & couldn't find Framework properties set in CMake configs.

I'm curious if builds for iOS derivatives are currently planned or being considered? If not, and if agreed upon, I'd be happy to submit a pull request to add the FRAMEWORK properties for appropriate targets.

Happy New Year to all!

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[lgritz]

I don't think we have it specifically planned, but if anybody wanted to make the PRs to make it work, I think we would happily accept them as long as they didn't make the other platforms dramatically more complex somehow. If it's mostly a matter of putting the right CMake bits in, please do! (Not being an iOS programmer, I'm less certain about how we would test it in CI, but if you have ideas there, those are also very welcome.)

[Treata11]

@lgritz

I see that OSL has a rather complex dependency tree, and not all of them currently support iOS builds. The same goes for OpenImageIO.
Fortunately, most of the interdependencies are on my list to address. I'll get back to this issue once those are taken care of.

(Not being an iOS programmer, I'm less certain about how we would test it in CI, but if you have ideas there, those are also very welcome.)

Will do once everything's set up.

[lgritz]

Sounds great, @Treata11. On the OIIO side, as you note, it is an especially complex dependency situation. However, most of those dependencies are used to support particular image file formats, and most of those are optional dependencies -- meaning that if the dependency is not found at build time, OIIO will proceed to build, but disabling support for that particular file format. So you can be very strategic about prioritizing dependencies: only truly required dependencies at first, then adding optional dependencies in an order guided by the likelihood of encountering those particular file formats on an iOS device, and purposely leaving out support for formats you won't need on iOS or for the use cases you have in mind for your app.