pull config/BuildSystem and rerun config/configure.py

[Matthew Knepley]

Are there ever any tests of this shit? It broke IMMEDIATELY on my box.

  Matt

On Wed, Jun 10, 2009 at 11:02 PM, Satish Balay <balay at mcs.anl.gov> wrote:

> On Wed, 10 Jun 2009, Barry Smith wrote:
>
> >
> >   All petsc-dev users. Next time you pull petsc-dev make sure you pull
> > config/BuildSystem also and rerun your configure with
> > ${PETSC_ARCH}/conf/reconfigure-${PETSC_ARCH}.py
> > As always, report any problems to petsc-dev at mcs.anl.gov
> >
> >   Barry
> >
> >
> > What I changed. I discovered the ar flags Sq that are much faster than
> our
> > current use of r. For my laptop these are the timings for "make all"
> debug
> > version
> >
> >                regular libraries           --with-single-library(new
> > config/configure.py option to put all code into libpetsc.a (not yet
> working
> > for shared libraries)).
> >
> > old           9 min 23 sec                    28 min
> > new         2 min 49 sec                      2 min 58 sec
>
> On linux [my laptop] - both the old and new mode [regular libraries]
> take about 2min10sec.
>
> >
> > What I changed: added the flag FAST_AR_FLAGS that is used by libfast:
> instead
> > of AR_FLAGS; also added fast versions of buildmod called buildmodfast
> that use
> > libffast that uses FAST_AR_FLAGS
> >
> > Once we get rid of the damn make we should see the entire "make all" take
> less
> > than a minute
>
> The issue is the recursive make - and all the shell processes that get
> created during it. If we have something eqivalent to automake - then
> it should zip through everything with 'make -j 8' - on the newer
> multicore machines pretty quickly..
>
> Satish
>



-- 
What most experimenters take for granted before they begin their experiments
is infinitely more interesting than any results to which their experiments
lead.
-- Norbert Wiener
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