# File src/ruby_supportlib/phusion_passenger/platform_info/curl.rb, line 30
    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