GCC vs. `make' on Solaris

[Mark Mitchell]

>>>>> "Fergus" == Fergus Henderson <fjh@cs.mu.oz.au> writes:

    Fergus> This behaviour is a consequence of the fact that Make
    Fergus> works by looking at the timestamps on files, and "@true"
    Fergus> doesn't update the timestamp. 

Yes.  

I had assumed that it said:

  Oh, look, A is dependent on B.  I'd better see if B needs
  rebuilding.  Oh, B is dependent on C.  And C is newer than
  B.  So, rebuild B.  OK, I rebuilt B, now I'd better rebuild A.

I didn't realize there was another step:

  OK, I rebuilt B -- but did I actually *do* anything?  Oh,
  I didn't, OK no need to update A.

I don't think that's obvious from reading the manual, so it would be
cool if it were explained.

But now I understand how it works.

Thanks,
	
--
Mark Mitchell                   mark@codesourcery.com
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