Cocoapods link_with XCTest generates duplicate symbol errors

Question

I have this main project that will generate a static library (call it MySDK). I have a component (call it Analytics) as a private cocoapod.

So I end up with a file structure like this:

+ MySDK
    - src
+ Pods
    + Pods
        - Analytics

Each project has it's own tests, but now I need to do some integration testing so in my Podfile I use link_with, but whenever I do this I can't even run the original tests because I get a bunch of duplicate symbol errors:

duplicate symbol _OBJC_METACLASS_$_PodsDummy_Pods in:
    /.../DerivedData/Build/Products/Release-iphonesimulator/libPods.a(Pods-dummy.o)
    /.../DerivedData/Build/Products/Release-iphonesimulator/libMySDK.a(Pods-dummy.o)
...
duplicate symbol _MYPREFIXFileTableIDColumnName in:
    /.../DerivedData/Build/Products/Release-iphonesimulator/libPods.a(MYPREFIXDatabaseConstants.o)
    /.../Build/Products/Release-iphonesimulator/libMySDK.a(MYPREFIXDatabaseConstants.o)

All the errors come from my Analytics component. All the files causing a problem have C functions (I'm dealing with sqlite directly) and/or (global) constants, or they are categories, but they're all prefixed.

My Podfile looks like this:

platform :ios, '7.0'
link_with ['MySDK', 'MySDKTests']
pod 'Analytics', '0.0.1'

My podscpec for Analytics looks like this:

Pod::Spec.new do |s|
  s.name     = 'Analytics'
  s.version  = '0.0.1'
  s.platform = :ios
  s.summary  = "Analytics utility"
  s.homepage = 'http://google.com'
  s.author   = { 'Me' => 'me@me.com' }
  s.source   = { :git => 'https://github.com/Company/Analytics.git', :tag => '0.0.1' }
  s.source_files = 'Analytics/**/*.{h,m}'
  s.requires_arc = true
  s.ios.deployment_target = '6.0'
end

Is there a reason why I'm getting these errors? Should I compile these files as non-arc or use some special flag?

Any ideas

Answer 1

I finally got it to work!

I shouldn't have linked my pods to MySDKTests, since the final product (MySDK, a library, was already linking against Analytics).

I did however add the following to my podspec file:

  s.public_header_files = 'Analytics/**/*.h'

  s.xcconfig = { 'HEADER_SEARCH_PATHS' => '"$(SRCROOT)/Pods/Headers/Analytics"' }

The second line is not really necessary because it's not modifying my MySDKTests target. I did have to add HEADER_SEARCH_PATHS to my MyDSKTests to make those headers available to the tests.

I've read that some people successfully use LIBRARY_SEARCH_PATHS instead, but this didn't work for me. If anyone care to explain why, that'd be great, but for now I'll leave my solution here for other people in case they come across similar issue.

See this other question for related info