Error after running make cocoapods:
xcrun: error: SDK "iphoneos" cannot be located
xcrun: error: SDK "iphoneos" cannot be located
xcrun: error: SDK "iphoneos" cannot be located
xcrun: error: unable to lookup item 'Path' in SDK 'iphoneos'
/Users/greg/Library/Caches/CocoaPods/Pods/External/glog/2263bd123499e5b93b5efe24871be317-e8acf/missing: Unknown `--is-lightweight' option
Try `/Users/greg/Library/Caches/CocoaPods/Pods/External/glog/2263bd123499e5b93b5efe24871be317-e8acf/missing --help' for more information
configure: WARNING: 'missing' script is too old or missing
configure: error: in `/Users/greg/Library/Caches/CocoaPods/Pods/External/glog/2263bd123499e5b93b5efe24871be317-e8acf':
configure: error: C compiler cannot create executables
See `config.log' for more details
Solution: facebook/react-native#18408 (comment)