Is there any easy way to check my machine description?

[Xing GUO]

Hi folks,

I'm working on adding a new target to GCC. I have to implement a new
machine description to it. Every time I edit the machine description, I
have to rebuild GCC entirely. I want to ask: is there any easy way to check
the syntax/correctness of the machine description (.md files)?

Thanks in advance!

Cheers,
Xing