ld: framework not found GTMOAuth2

Question

Everything was working fine till I got my mac formatted. After formatting it (Moved from El Capitan to Sierra), I cloned the repository, installed Cocoapods, did pod update. And everything got messed up with pods. I cannot build the application. The error is with Cocoapods (I think so). The error is as follows:

ld: framework not found GTMOAuth2
clang: error: linker command failed with exit code 1 (use -v to see invocation)

I am using Xcode 8.0 and Swift 2.3, with Cocoapods 1.1.1.

My Podfile is:

# Uncomment this line to define a global platform for your project
# platform :ios, '9.0'

target 'ProjectName' do
  # Comment this line if you're not using Swift and don't want to use dynamic frameworks
  use_frameworks!

  # Firebase Pods
  pod 'Firebase'
  pod 'Firebase/Messaging'
  pod 'Firebase/Auth'
  pod 'Firebase/Crash'

  # Google Pods
  pod 'Google/SignIn'
  pod 'Google/Analytics'

  # Crashlytics
  pod 'Fabric'
  pod 'Crashlytics'

  # Facebook
  # pod 'FacebookCore'

  # Pods for ProjectName

  target 'ProjectName Tests' do
    inherit! :search_paths
    # Pods for testing
  end

  target 'ProjectName UITests' do
    inherit! :search_paths
    # Pods for testing
  end
end

Also receiving warning regarding framework paths. That are as follows:

ld: warning: directory not found for option '-F/Users/<user>/Library/Developer/Xcode/DerivedData/<project-name>-ftvbhpamiyfzmwdfpxknyvpcypde/Build/Products/Debug-iphonesimulator/GTMOAuth2'

ld: warning: directory not found for option '-F/Users/<user>/Library/Developer/Xcode/DerivedData/<project-name>-ftvbhpamiyfzmwdfpxknyvpcypde/Build/Products/Debug-iphonesimulator/GTMSessionFetcher'

ld: warning: directory not found for option '-F/Users/<user>/Library/Developer/Xcode/DerivedData/<project-name>-ftvbhpamiyfzmwdfpxknyvpcypde/Build/Products/Debug-iphonesimulator/GoogleToolboxForMac'

Answer 1

Reopen your project by choosing .xcworkspace(not .xcodeproj), those 3 warnings and 1 error will be gone.