Re: make -j max_jobs

[David Holland <dholland-tech%netbsd.org@localhost>]

On Wed, Apr 21, 2010 at 10:06:00PM -0700, Simon J. Gerraty wrote:
 > If you run make with -j8 etc,
 > "-j" and "8" are placed in .MAKEFLAGS as two separate words.
 > So to get max_jobs you need something like:
 > 
 > _NJOBS := ${.MAKEFLAGS:C,.*-j *([1-9][0-9]*).*,\1,W}
 > 
 > would it be more useful to set say .MAKE.JOBS or .MAKE.MAX_JOBS to the
 > actual arg value as in:

Yes. I've been trying to think if there's a better way to provide
make's status information than an arbitrary collection of .MAKE.*
variables, but I haven't come up with anything yet.

 >              case 'B':
 >                      compatMake = TRUE;
 >                      Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL);
 > +                    Var_Set(MAKE_MODE, "compat", VAR_GLOBAL, 0);
 >                      break;

Is this right? Aren't we currently in compat mode *unless* -j is used?

(as I've said elsewhere I don't think such linkage is a good idea, but
that's a different discussion)

-- 
David A. Holland
dholland%netbsd.org@localhost