CocoaPods/Specs — comment on commit 3ade16bc4f210e426ec5ede054acb9bd54da2cbb
File: Expecta/0.1.3/Expecta.podspec line 25
By kommen:

Pro Tip: the `-ObjC` linker flag is set by default (https://github.com/CocoaPods/CocoaPods/blob/master/lib/cocoapods/installer/target_installer.rb#L19) so you can omit it in the podspec.