[gambit-list] Could use hackers to try gambit with development version of gcc

naruto canada narutocanada at gmail.com
Thu Nov 1 07:36:01 EDT 2007


On 11/1/07, naruto canada <narutocanada at gmail.com> wrote:
> On 11/1/07, Bradley Lucier <lucier at math.purdue.edu> wrote:
> > Over the years I've spent some time building gambit with development
> > versions of gcc; the gcc developers have been quite helpful in fixing
> > bugs and removing inefficiencies uncovered by this testing before the
> > official releases of gcc.  There is some interest in using
> > automatically-generated C code, like the code that gsc produces, as
> > "extreme" test cases for gcc's internal algorithms.
> >
> > Because of the timing of future linux releases, gcc-4.3.0, the next
> > major release of gcc, will likely go into fedora, Open Suse, and a
> > few other linux releases.  I've started using it to compile gambit
> > just to see what happens.  For example, I found one important loop
> > that was compiled to significantly slower code by development 4.3.0
> > than by the released 4.2.2 on x64-64, and I think that this will
> > likely be fixed before release.  Problems that arise in the
> > development version of gcc that used to work in previous versions are
> > quite likely to be fixed before release.
> >
> > I just tried development gcc-4.3.0 on powerpc-apple-darwin8.10.0
> > (i.e, MacOS X 10.4.10 on powerpc) in 64-bit code and I got a segfault
> > in the garbage collector when trying to calculate (expt 3 10000000).
> > (I just tried it in 32-bit code and got segfault in a different place
> > in the garbage collector.)
> >
> > Perhaps I'm just feeling older and more tired than usual, but I sure
> > would feel better if some other people downloaded the svn sources of
> > gcc, built it, and tried building and testing gambit with it.  (I
> > looked at that GC segfault and the wind just went out of me.)
> >
> > Instructions for downloading the svn development version of gcc are at
> >
> > http://gcc.gnu.org/svn.html
> >
> > under "Using the SVN repository".  You'll need to install a

Is there a svn switch like "make"'s -j3 to make svn download faster?
It's been 12 hours, and it's still going and going.
svn help don't seem to show anything for multi-threaded download.


> > relatively recent version of gmp and mpfr.  I build and configure gcc
> > for the purposes of gcc testing with
>
> I'm getting heap overflow with gambit-c v4.0.0 gcc-3.4.6 :
>
> root at localhost: /usr/v4.0.0/bin/gsi
> Gambit v4.0.0
>
> > (expt 3 10000000)
> *** ERROR IN ##make-string -- Heap overflow
> 1>
>
> I guess this is not the same as segfault.
>
> >
> > ../../mainline/configure --prefix=/pkgs/gcc-mainline --enable-
> > languages=c --enable-checking=release --with-gmp=/pkgs/gmp-4.2.2 --
> > with-mpfr=/pkgs/gmp-4.2.2
> >
> > and then
> >
> > make bootstrap
> >
> > It's not entirely trivial, but it may be of interest to some people
> > who are into this kind of thing.
> >
> > Brad
> > _______________________________________________
> > Gambit-list mailing list
> > Gambit-list at iro.umontreal.ca
> > https://webmail.iro.umontreal.ca/mailman/listinfo/gambit-list
> >
>



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