Disable Magical Record in Podfile for CocoaPods

Podfile

class Pod::Podfile
    def self.MR_disable_logging(installer)
        target = installer.project.targets.find{|t| t.to_s == "Pods-MagicalRecord"}
        target.build_configurations.each do |config|
            s = config.build_settings['GCC_PREPROCESSOR_DEFINITIONS']
            s = [ '$(inherited)' ] if s == nil;
            s.push('MR_ENABLE_ACTIVE_RECORD_LOGGING=0') if config.to_s == "Debug";
            config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] = s
        end
    end
end

post_install do |installer|
    Pod::Podfile::MR_disable_logging(installer)
end