FB7339179: Combine framework doesn't want to be weak-linked in release builds.

[sunshinejr]

Date: 2019-10-01
Resolution: Open
Area: Combine.framework
OS: macOS 10.15 beta 10
Xcode: 11
Type: Application Crash

Description

We tried implementing Combine extensions at Moya but it turned out that all of the package managers had problems with automatic linking & canImport(Combine) statement. When talking to Ankit he thought that it might be a problem with Combine framework itself and availability marks. We really would like to support Combine but it seems like it’s impossible right now without breaking iOS < 13. I would really appreciate any guidance on that.

Example project: https://github.com/phimage/moyacmdtest
Discussion around Combine support: Moya/Moya#1928

[sindresorhus]

Still an issue in Xcode 11.3.1 and macOS 10.15.2...

[sunshinejr]

I just checked Feedback Assistant and saw "potential fix identified". This made me check the linking situation in Xcode 11.5.0-beta.1 and it actually weak-links Combine properly!

Archived with Xcode 11.4.1	Archived with Xcode 11.5.0-beta.1

cc @sindresorhus