Re: [Boost-users] Re: Problem 2 with Boost 1.31.0 Regex for tru64cxx65

From: Richard Hadsell (hadsell_at_[hidden])
Date: 2004-04-29 17:33:59

Rene Rivera wrote:

> Solving this will require changing the archive action in the 
> tru64cxx65-tools.jam file. The most generic way I can think of is to 
> change it to something like so:
>
> actions updated together piecemeal tru64cxx65-Archive-action
> {
>   rm -f $(<)
>   ar r$(ARFLAGS) $(<) $(>)
>   for i in "$(<[1]:D)"/cxx_repository/* ; do ar r$(ARFLAGS) $(<) $i ; 
> done
> }
>
> Tell me what works for you and I'll update the toolset in CVS.

This was great advice.  The unfortunate thing about the general way, 
adding just one file from the repository at a time, is the huge overhead 
of each call to ar.  I remember trying this myself a couple of years ago 
and deciding it was unacceptable.  That was why I added as many object 
files at a time as I could get away with.  This time, I had to break it 
into four pieces:

actions updated together piecemeal tru64cxx65-Archive-action
{
  rm -f $(<)
  ar r$(ARFLAGS) $(<) $(>)
# one at a time is general, but too slow.  Do a bunch at once.
# for i in "$(<[1]:D)"/cxx_repository/* ; do ar r$(ARFLAGS) $(<) $i ; done
  ar r$(ARFLAGS) $(<) "$(<[1]:D)"/cxx_repository/[_A-Z]*
  ar r$(ARFLAGS) $(<) "$(<[1]:D)"/cxx_repository/[a-f]*
  ar r$(ARFLAGS) $(<) "$(<[1]:D)"/cxx_repository/[g-m]*
  ar r$(ARFLAGS) $(<) "$(<[1]:D)"/cxx_repository/[n-z]*
}

Of course, there may be libraries for which this will still fail.  I 
don't know how to arrive at a better solution, but you could just wait 
until someone complains and then break it into smaller pieces.

For now, I'll go with this huge time savings.  I didn't let it go to 
completion with the one-at-a-time rule, but I'm pretty sure it's on the 
order of 10-15 minutes, compared to 10-15 sec. with my approach.

-- 
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