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swiftxcodeswift-package-manager

Framework not found FBLPromises (Swift Package Manager)

I've seen this problem listed elsewhere, but it always seems to be linked to a Cocoapods installation of Firebase. My problem is the opposite - trying to upgrade from pods to SPM has given me this problem when I try to compile:

ld: framework not found FBLPromises

I'm currently running Xcode 13.3 on a Mac Mini with an M1 chip, but the problem was present in earlier versions of Xcode.

Previously I had Disk (https://github.com/saoudrizwan/Disk) installed via SPM and Firebase/Messaging and Twilio (5.5.1) installed via Cocoapods. I ran pod clean and pod deintegrate, deleted all the Pod files etc and have installed Twilio and Firebase Messaging using SPM. This gives me the following Package Dependencies (and you can see that Promises 2.0.0 has been added successfully):

PackageDependencies

The top result I get when I look into this is FBLPromises Framework not found, and the second answer suggests adding arm64 as an excluded architecture, but doing that gives me further problems (warning and error below), and I'd rather not exclude an architecture blindly and then go down a rabbithole of trying to fix that when it might not be the solution to my original problem.

Warning and error when I try to exclude arm64 architecture:

None of the architectures in ARCHS (arm64) are valid. Consider setting ARCHS to $(ARCHS_STANDARD) or updating it to include at least one value from VALID_ARCHS (arm64, arm64e, armv7, armv7s) which is not in EXCLUDED_ARCHS (arm64).

error: Build input file cannot be found: '/Users/myName/Library/Developer/Xcode/DerivedData/project-exchrqebmyccatebeoxupvxpdsul/Build/Products/Debug-iphoneos/project.app/project' (in target 'project' from project 'project')

Solution

  • I've not checked to make sure I've not introduced other errors further down the line, but I think the problem was caused by Linker Flags being retained in the build settings.

    I went to the Target -> Build Settings -> Linking and deleted everything under 'Other Linker Flags' (OTHER_LDFLAGS is how this is reflected in the project.pbxproj file according to my git diff).

    File now compiles and runs successfully, if I find some subtle bugs later that might be caused by this I shall edit this answer accordingly!