    # File lib/phusion_passenger/platform_info/curl.rb, line 29
            def self.curl_flags
                    result = `(curl-config --cflags) 2>/dev/null`.strip
                    if result.empty?
                            return nil
                    else
                            version = `curl-config --vernum`.strip
                            if version >= '070c01'
                                    # Curl >= 7.12.1 supports curl_easy_reset()
                                    result << " -DHAS_CURL_EASY_RESET"
                            end
                            return result
                    end
            end