Re: include files with :=

[Noel Yap]

File open/close is a very expensive operation.  If you're including many 
makefiles, this may be where your lag is coming from.  Also, whenever you 
include a makefile, there's a chance that make will re-exec although the 
details aren't coming to me right now.

Noel

Paul D. Smith wrote:

> %% "Dill, John" <address@hidden> writes:
>
>   dj> I am still trying to track down where exactly my lag time is
>   dj> coming from, and it doesn't appear to be from using the include
>   dj> directive by itself.  My question is how makefile evaluates
>   dj> variables that are defined using ':=' with respect to include
>   dj> files.  If I have a file include_me.mk which contains:
>
>   dj> my_var:=$(shell script)
>
>   dj> and I have included this file several times (indirectly through my
>   dj> file's dependent include files).  Does make re-evaluate this
>   dj> variable assignment each time 'include include_me.mk' appears?
>
> Of course, just like any other variable assignment.