Build failure building https://github.com/firebase/firebase-ios-sdk/pull/38

gistfile1.txt

Ld /Users/paulbeusterien/Library/Developer/Xcode/DerivedData/Firebase-fnkznbqrceqducahowvgwcwrfvkz/Build/Products/Debug-iphonesimulator/FirebaseDev-Core-Root-iOS/FirebaseDev.framework/FirebaseDev normal x86_64
    cd /Users/paulbeusterien/gh/prs/firebase-ios-sdk/Example/Pods
    export IPHONEOS_DEPLOYMENT_TARGET=8.0
    export PATH="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"
    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch x86_64 -dynamiclib -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.3.sdk -L/Users/paulbeusterien/Library/Developer/Xcode/DerivedData/Firebase-fnkznbqrceqducahowvgwcwrfvkz/Build/Products/Debug-iphonesimulator/FirebaseDev-Core-Root-iOS -F/Users/paulbeusterien/Library/Developer/Xcode/DerivedData/Firebase-fnkznbqrceqducahowvgwcwrfvkz/Build/Products/Debug-iphonesimulator/FirebaseDev-Core-Root-iOS -F/Users/paulbeusterien/Library/Developer/Xcode/DerivedData/Firebase-fnkznbqrceqducahowvgwcwrfvkz/Build/Products/Debug-iphonesimulator/GoogleToolboxForMac-Defines-NSData+zlib-iOS -filelist /Users/paulbeusterien/Library/Developer/Xcode/DerivedData/Firebase-fnkznbqrceqducahowvgwcwrfvkz/Build/Intermediates/Pods.build/Debug-iphonesimulator/FirebaseDev-Core-Root-iOS.build/Objects-normal/x86_64/FirebaseDev.LinkFileList -install_name @rpath/FirebaseDev.framework/FirebaseDev -Xlinker -rpath -Xlinker @executable_path/Frameworks -Xlinker -rpath -Xlinker @loader_path/Frameworks -mios-simulator-version-min=8.0 -dead_strip -Xlinker -object_path_lto -Xlinker /Users/paulbeusterien/Library/Developer/Xcode/DerivedData/Firebase-fnkznbqrceqducahowvgwcwrfvkz/Build/Intermediates/Pods.build/Debug-iphonesimulator/FirebaseDev-Core-Root-iOS.build/Objects-normal/x86_64/FirebaseDev_lto.o -Xlinker -export_dynamic -Xlinker -no_deduplicate -Xlinker -objc_abi_version -Xlinker 2 -fobjc-arc -fobjc-link-runtime -framework Foundation -framework GoogleToolboxForMac -single_module -compatibility_version 1 -current_version 1 -Xlinker -dependency_info -Xlinker /Users/paulbeusterien/Library/Developer/Xcode/DerivedData/Firebase-fnkznbqrceqducahowvgwcwrfvkz/Build/Intermediates/Pods.build/Debug-iphonesimulator/FirebaseDev-Core-Root-iOS.build/Objects-normal/x86_64/FirebaseDev_dependency_info.dat -o /Users/paulbeusterien/Library/Developer/Xcode/DerivedData/Firebase-fnkznbqrceqducahowvgwcwrfvkz/Build/Products/Debug-iphonesimulator/FirebaseDev-Core-Root-iOS/FirebaseDev.framework/FirebaseDev

Undefined symbols for architecture x86_64:
  "_inflate", referenced from:
      +[NSData(GTMZlibAdditionsPrivate) gtm_dataByInflatingBytes:length:isRawData:error:] in GTMNSData+zlib.o
  "_deflate", referenced from:
      +[NSData(GTMZlibAdditionsPrivate) gtm_dataByCompressingBytes:length:compressionLevel:mode:error:] in GTMNSData+zlib.o
  "_inflateEnd", referenced from:
      +[NSData(GTMZlibAdditionsPrivate) gtm_dataByInflatingBytes:length:isRawData:error:] in GTMNSData+zlib.o
  "_deflateInit2_", referenced from:
      +[NSData(GTMZlibAdditionsPrivate) gtm_dataByCompressingBytes:length:compressionLevel:mode:error:] in GTMNSData+zlib.o
  "_inflateInit2_", referenced from:
      +[NSData(GTMZlibAdditionsPrivate) gtm_dataByInflatingBytes:length:isRawData:error:] in GTMNSData+zlib.o
  "_deflateEnd", referenced from:
      +[NSData(GTMZlibAdditionsPrivate) gtm_dataByCompressingBytes:length:compressionLevel:mode:error:] in GTMNSData+zlib.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)