Re: make: dealing with targets with multiple outputs

[Kurt Lidl <lidl%pix.net@localhost>]

On 5/31/19 2:06 PM, Simon J. Gerraty wrote:
> David Holland <dholland-tech%netbsd.org@localhost> wrote:
> > We already have a solution for this problem, it's just waiting for
> > someone to find time to implement it.
> >
> > Namely: given multiple targets on the left, don't schedule them in
> > parallel, and after building the first one check to see how many of
> > the others also got knocked off at the same time.
>
> Couple that with a special target to trigger it - sounds good.
> That way you avoid the need to rewrite lots of makefiles with .for loops
>
> The key is still to associate all the targets that were on lhs

I guess that I have to ask the question - why not just add additional 
dependencies to more or less force serial operation?

I did this previously, and it worked OK for both single processor and 
large -j values:

cfg_schema_parse.h: cfg_schema_parse.c
cfg_schema_parse.c: ${.CURDIR}/../common/cfg_schema_parse.y ${INCS}
        ${YACC} ${YFLAGS} --output=${.TARGET} ${.IMPSRC}

-Kurt