keil编译不提示版本不可用

点击编译时出现以下提示
*Target 'Target 1' uses ARM-Compiler 'Default Compiler Version 5' which is not available.
Please review the installed ARM Compiler Versions:

• 'Manage Project Items - Folders/Extensions' to manage ARM Compiler Versions.
  'Options for Target - Target' to select an ARM Compiler Version for the target.
• Build aborted.
  Build Time Elapsed: 00:00:00

看这个，我也是一样的问题https://blog.csdn.net/qcmyqcmy/article/details/125814461

你装的可能是KEIL FOR 51,重新安装MDK,安装ARM编译器