Fwd: Clang now builds world and kernel, on i386 and amd64

Could you guys give us some help on this?


---------- Forwarded message ----------
From: Roman Divacky <rdivacky_at_freebsd.org>
Date: Wed, Sep 29, 2010 at 2:44 PM
Subject: Re: Clang now builds world and kernel, on i386 and amd64
To: Renato Botelho <rbgarga_at_gmail.com>
Cc: Derek Tattersall <dlt_at_mebtel.net>, Dimitry Andric
<dim_at_freebsd.org>, current_at_freebsd.org


On Wed, Sep 29, 2010 at 02:41:17PM -0300, Renato Botelho wrote:
> On Wed, Sep 29, 2010 at 2:31 PM, Roman Divacky <rdivacky_at_freebsd.org> wrote:
> > On Wed, Sep 29, 2010 at 11:56:59AM -0400, Derek Tattersall wrote:
> >> * Dimitry Andric <dim_at_freebsd.org> [100929 08:55]:
> >> > On 2010-09-29 13:23, Renato Botelho wrote:
> >> > > #!/usr/bin/perl
> >> > >
> >> > > use File::Temp;
> >> > >
> >> > > my ( $fh, $filename ) = File::Temp::tempfile();
> >> > > print "$filename\n";
> >> >
> >> > For me it works perfectly, though I am using perl 5.10:
> >> >
> >> > $ cat foo.pl
> >> > #!/usr/bin/perl
> >> >
> >> > use File::Temp;
> >> >
> >> > my ( $fh, $filename ) = File::Temp::tempfile();
> >> > print "$filename\n";
> >> > $ perl -v
> >> >
> >> > This is perl, v5.10.1 (*) built for i386-freebsd-64int
> >> >
> >> > Copyright 1987-2009, Larry Wall
> >> >
> >> > Perl may be copied only under the terms of either the Artistic License or the
> >> > GNU General Public License, which may be found in the Perl 5 source kit.
> >> >
> >> > Complete documentation for Perl, including FAQ lists, should be found on
> >> > this system using "man perl" or "perldoc perl". ?If you have access to the
> >> > Internet, point your browser at http://www.perl.org/, the Perl Home Page.
> >> >
> >> > $ perl foo.pl
> >> > /tmp/tv25CPnWhF
> >> > $ perl foo.pl
> >> > /tmp/L2UJQ5_JJs
> >> > $ perl foo.pl
> >> > /tmp/6ynQYvWIc1
> >> > $ perl foo.pl
> >> > /tmp/Tdpf7PKBMg
> >> > $ perl foo.pl
> >> > /tmp/76ir2i1ici
> >> > $ perl foo.pl
> >> > /tmp/LhfD0eZgd8
> >> >
> >> > I'll try building perl 5.12 and try it again.
> >> >
> >> > Btw, I assume you did *not* rebuild perl with clang, so your perl is
> >> > still compiled with gcc?
> >> > _______________________________________________
> >> > freebsd-current_at_freebsd.org mailing list
> >> > http://lists.freebsd.org/mailman/listinfo/freebsd-current
> >> > To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org"
> >> I built a test case using perl 5.12 and demonstrated that calling int(rand())
> >> in perl returns NAN, as does calling rand() by itself. ?A "C" program
> >> that calls libc's rand() does return differing integers. ?The perl
> >> documentation claims that perl's rand() calls "C"s rand() and srand() if
> >> necessary. ?I think this effectively demonstrates that the problem lies
> >> with the perl function rand() and it's interface to libc's rand() as
> >> provided by clang.
> >>
> >> On a recent stable system, perl's mktemp works fine. ?The only real
> >> difference is that libc on stable is built with gcc and libc on current
> >> is built with clang.
> >
> > what does this show with clang libc?
> >
> > perl -e 'print int(rand(60)) . " \n" foreach (1 .. 10)'
> >
> > I guess it returns all 0, as the $CHAR[0] is 'A', can you test that?
> >
>
> root_at_botelhor:/usr/src/lib/libc# perl -e 'print int(rand(60)) . " \n"
> foreach (1 .. 10)'
> nan
> nan
> nan
> nan
> nan
> nan
> nan
> nan
> nan
> nan

heh, now I noticed that Derek already wrote that ;) is anyone able
to find where in perl sources the rand function is defined? I failed
that :(



-- 
Renato Botelho