Re: dir_PRIMARY_*FLAGS

[Bob Friesenhahn]

On Tue, 6 Nov 2007, Ralf Wildenhues wrote:
> Yes.  Maybe I should write a paper "nonrecursive make also considered
> harmful" just to be able to point people at it.  It's overhyped.
> There is no need to be completely nonrecursive.  There's been a lot

Ralf,

Thanks for sharing your true feelings.  I will never again think of 
you the same ...  Sniff! Sniff!  Boo, hoo!

While creating a nonrecursive build environment is more painful, and 
you do lose a few conveniences (e.g. cd foodir; make foo), I still 
have no regrets that I converted GraphicsMagick to it.  The software 
compiles much faster now (yes, really!) and there are no wasted 
build operations.

Old recursive build:
  gmake -j 5  90.03s user 8.25s system 206% cpu 47.674 total

New non-recursive build:
  gmake -j 5  95.85s user 4.64s system 291% cpu 34.465 total

I will fully agree that it takes more effort to set-up a large 
non-recursive build environment.  A top-down design is required.

Bob
======================================
Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/