When I run xcode, it generates:
ld: warning: directory not found for option '-L/Users/Marigold/Library/Developer/Xcode/DerivedData/Unity-iPhone-dcvtelabdpuejxffyojvoivgykqw/Build/Products/ReleaseForRunning-iphoneos/GTMOAuth2'
ld: warning: directory not found for option '-L/Users/Marigold/Library/Developer/Xcode/DerivedData/Unity-iPhone-dcvtelabdpuejxffyojvoivgykqw/Build/Products/ReleaseForRunning-iphoneos/GTMSessionFetcher'
ld: warning: directory not found for option '-L/Users/Marigold/Library/Developer/Xcode/DerivedData/Unity-iPhone-dcvtelabdpuejxffyojvoivgykqw/Build/Products/ReleaseForRunning-iphoneos/GoogleAPIClientForREST'
ld: warning: directory not found for option '-L/Users/Marigold/Library/Developer/Xcode/DerivedData/Unity-iPhone-dcvtelabdpuejxffyojvoivgykqw/Build/Products/ReleaseForRunning-iphoneos/GoogleToolboxForMac'
ld: warning: directory not found for option '-L/Users/Marigold/Library/Developer/Xcode/DerivedData/Unity-iPhone-dcvtelabdpuejxffyojvoivgykqw/Build/Products/ReleaseForRunning-iphoneos/Protobuf'
ld: library not found for -lGTMOAuth2
clang: error: linker command failed with exit code 1 (use -v to see invocation)