Re: Does (normal) prerequisite order matter?

[Matt England]

(I'll try sending this again with the spam-inserted header text...)

Thanks Ken for the feedback.  A clarification:

At 11/18/2005 02:17 PM, Ken Smith wrote:
> Consider this expansion of your example.
>
> target1: prereq1 prereq2
>         touch $@
>
> prereq1:
>         sleep 5
>         touch $@
>
> prereq2:
>         touch $@
>
> If you run gmake -j2, prereq2 will be created before prereq1.  If you
> run gmake without parallelization, prereq1 will be created before
> prereq2.  However, you can employ an order-only prerequisite to ensure
> that prereq1 is completed before prereq2 begins even for parallel builds
> by adding the following to the above expanded example.
>
> prereq2: | prereq1


Does the following work to support parallel builds (without above the 
sleep's and touch's):

<Makefile>
target1: prereq1 prereq2

prereq2: | prereq1
</Makefile

?

-Matt