Re: How to modify algorithm that determines weather a target needs rebuild

[Philip Guenther]

On Sunday, August 8, 2010, mirage1987 <address@hidden> wrote:
...
> So in short this what i want to achieve:
> -Check if foo.o exists
>      - Yes :
>            Check if timestamp of foo.o == timestamp of foo.c
>            Yes:
>                Dont build
>            No:
>                Build and touch foo.o to timestamp of foo.c
...

Hmm, how will that work for a file that has multiple dependencies?  If
you always use the timestamp of, say, its first dependency, then how
can you determine whether it's out of date with respect to the second
or later dependencies?


Philip Guenther