about :: sign and % sign problems

[Lin George]

Hello everyone,


I have read through GNU Makefile manual related parts dealing with the description of sign "::" -- but after reading it, it makes me more confused. :-)

 

So, could anyone show me a simple example of what means "::"? Or give an explanation of the following simple samples?

 

What makes me confused is the sign '%' and ":: ;" string.

Example 1:

--------------------
% :: $(Foo);
--------------------

Example 2:

--------------------
%.test :: ;
--------------------

What do they mean?


thanks in advance,
George

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