Re: about :: sign and % sign problems

[Lin George]

Thank you very much John!

 

 

What means "::" (I read related parts from GNU make and still confused)? What is the difference between "::" and ":"?

 

> if there was
> a command after the ; it would be executed when this rule ran).

 

Another question, ";" means do nothing, why sometimes we still add some commands after ;? (I mean, if do nothing, we should not add any commands after ";").

 

have a good day,

George

John Graham-Cumming <address@hidden> wrote:

> Lin George wrote:
> > % :: $(Foo);
>
> Means: in order to build any file (that's what the % matches) from the 
> prerequisites $(Foo) do nothing (that's what the ; means---if there was 
> a command
>  after the ; it would be executed when this rule ran).
>
> > %.test :: ;
>
> In order to build anything that ends .test do nothing.
>
> John.

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