Re: Improvement on parallel make

[Christophe Lyon]

> > all-local: $(whatever local targets are)
> > The main thing I assume here may be that you "inherit" this Makefile from
> > an
> > external project, on which you may have little influence. You want to
> > improve the build time but can't afford to re-write the whole set of
> > Makefiles.
>
> Yup. Most of the code I deal with is third party source, exactly as you say.
> It's fairly straightforward to create a rule with the appropriate
> dependencies which goes off and builds the third-party Makefile accordingly.
> If it really comes down to it, you can use .NOTPARALLEL. I've never had a
> reason to need a .WAIT, and I guess that's true for a lot of other people
> too.
>
> Brendan

 

Sure, it's not difficult to replace

all: all-subdir all-local

by

all:

    $(MAKE) all-subdir

    $(MAKE) all-local

 

but, I don't want to introduce *recursive* calls to make. I find this ugly (I'm sure you know the famous paper "Recurvise Make considered harmful), it introduces unnecessary calls to make and exposes dependencies several times.

 

Writing

all: all-subdir .WAIT all-local

is just as easy, and it's more obvious to understand why it is written this way.
 

Christophe.