I am adding GoogleConversionTrackingSDK into my project and then calling the function: [ACTConversionReporter reportWithConversionID:@\"972050884\" label:@\"Bzk1CIzPkA
Have you tried to follow Boudewijn P's suggestion from here ?
Add -ObjC to the "Other Linker Flags" in the build settings. Or, if you get duplicate symbols, just force load the library by adding -force_load to the other linker flags: -force_load path/to/libGoogleConversionTracking.a replace "path/to" appropriately.