Re: about :: sign and % sign problems

[Lin George]

Thank you very much Paul!


Your reply has answered my question.


regards,
George

--- "Paul D. Smith" <address@hidden> wrote:

> %% Lin George <address@hidden> writes:
> 
>   >> foo:: bar ; echo Update due to bar
> 
>   >> foo:: baz ; echo Update due to baz
>    
>   lg> Good example! I think the effect is the same
> as the following
>   lg> statements (I think either bar or baz is out
> of date, foo will be
>   lg> remade.),
>    
>   lg> foo: bar baz ; echo something
> 
> But this doesn't do the same thing.
> 
> In my example above, "Update due to bar" will be
> printed if foo is out
> of date with respect to bar, and "Update due to baz"
> will be printed if
> foo is out of date with respect to baz.  If neither
> is out of date,
> nothing is printed.  If both are out of date, both
> are printed.
> 
> In your example, "something" is printed if either or
> both of bar and baz
> are out of date.
> 
>   lg> except that it is not easy to detect whether
> foo is remade by bar
>   lg> or remade by baz. Is that correct?
> 
> No, it's easy to tell which prerequisites were out
> of date.  Look up the
> $? variable in the GNU make manual.
> 
> -- 
>
-------------------------------------------------------------------------------
>  Paul D. Smith <address@hidden>          Find some
> GNU make tips at:
>  http://www.gnu.org                     
> http://make.paulandlesley.org
>  "Please remain calm...I may be mad, but I am a
> professional." --Mad Scientist
> 


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com