[racket-dev] SGC as default

Good point!

I assumed (based on earlier conversations?) that Sam knows about
`--enable-racket=...`. I thought that he was commenting on how the
build process would create things that are needed only for `racketcgc`,
even when `racketcgc` itself isn't needed.

I've now pushed changes that should skip all `racketcgc`-specific
pieces when `--enable-racket=...` is provided.

At Wed, 13 Aug 2014 11:08:22 +0200, Tobias Hammer wrote:
> What about ./configure --enable-racket=`which racket` ?
> Already needed and used for cross-compilation.
> 
> Tobias
> 
> 
> On Tue, 12 Aug 2014 18:00:21 +0200, Matthew Flatt <mflatt at cs.utah.edu>  
> wrote:
> 
> > I'm not sure how difficult it will be. It's tedious enough that the
> > last time I thought about it, I just left a note next to
> > "no-cgc-needed" in "racket/src/racket/Makefile.in", but maybe it's
> > worth pursuing now.
> >
> > At Tue, 12 Aug 2014 04:39:55 -0700, Sam Tobin-Hochstadt wrote:
> >> How difficult would it be to allow the bootstrap process to use a
> >> preexisting Racket installation? This would alleviate some of the
> >> performance loss, for example in rebuilds by developers or in continuous
> >> integration.
> >>
> >> Sam
> >> On Aug 11, 2014 11:16 PM, "Matthew Flatt" <mflatt at cs.utah.edu> wrote:
> >>
> >> > I've changed the Racket CGC implementation --- which is mostly used
> >> > only to build the normal Racket variant --- to use SGC by default,
> >> > instead of the Boehm GC. The intent of the switch is to make the more
> >> > portable GC the default.
> >> >
> >> > If you have an existing build in a repo checkout, then `make` is  
> >> likely
> >> > to fail, because the makefile dependencies are not precise enough to
> >> > deal with the switch. You can discard your old build directory, or it
> >> > might work to simply delete
> >> >
> >> >   <builddir>/racket/libmzgc.a
> >> >
> >> > If you're using CGC and want to continue using the Boehm GC, then
> >> > provide `--disable-sgc` to `configure`. I've tuned SGC to bring its
> >> > performance closer to the Boehm GC, but it's still slower.
> >> >
> >> > _________________________
> >> >   Racket Developers list:
> >> >   http://lists.racket-lang.org/dev
> >> >
> > _________________________
> >   Racket Developers list:
> >   http://lists.racket-lang.org/dev
> 
> 
> -- 
> Tobias Hammer
> DLR / Robotics and Mechatronics Center (RMC)
> Muenchner Str. 20, D-82234 Wessling
> Tel.: 08153/28-1487
> Mail: tobias.hammer at dlr.de