Xcode 11 beta 4 error: Command CompileSwiftSources failed with a nonzero exit code

Question

I've downloaded the latest Xcode beta 4. When I build I'm getting the same error with 3 of my pods:

Command CompileSwiftSources failed with a nonzero exit code
<unknown>:0: error: unknown argument: '-w'
<unknown>:0: error: unknown argument: '-Xanalyzer'
<unknown>:0: error: unknown argument: '-analyzer-disable-all-checks'

This is the MarqueeLabel pod logs:

I have tried:

• Cleaning and deep cleaning (shift + alt + cmd + k)
• Deleting the Derived Data folder
• Restarting Xcode

I can't see the error listed in the release notes. https://developer.apple.com/documentation/xcode_release_notes/xcode_11_beta_4_release_notes

Does anyone know what the problem is or a workaround?

Answer 1

There is a known issue with Cocoapods and Xcode 11 Beta 4 where inhibit_all_warnings! causes arguments to be set for Swift which do not compile. Removing this inhibit resolves the issue, and Swift warnings can be inhibited with SWIFT_SUPPRESS_WARNINGS = YES on targets instead.

Answer 2

CocoaPods had a fix for this that got released as part of CocoaPods 1.7.5.

---

Below is the answer preceding the 1.7.5 release:

_{If you need to use Xcode 11 Beta 4 in the mean time, you could install a patched version of CocoaPods from that pull request:}

_{1. Open Gemfile, replace gem 'cocoapods' with}

gem 'cocoapods', :git => 'https://github.com/dnkoutso/CocoaPods.git', :branch => "swift_compiler_warnings"

_{2. Run bundle install and bundle exec pod install}

_{Keep in mind, this is a temporary solution.}

Answer 3

The latest version of CocoaPods (1.7.5) has this issue fixed!

1. In Terminal run

   sudo gem update cocoapods

2. And then, on your project directory

   pod install