On Sun, 07 Aug 2011, Erland Sommarskog wrote:
>
> I was able to resolve the problem. Although I ran into another, eh,
> interesting issue.
>
> The problem was that in my Makefile.pl I had:
>
> 'CCFLAGS' => '/MT /W3', # Debug-flag: '/Zi',
> 'OPTIMIZE' => '/O2',
>
> That is, I entirely overrode whatever came with $Config. I got away with
> it for a long time, but finally time caught up with me. I changed this to:
>
> my $ccflags = $Config{'ccflags'};
> my $optimize = $Config{'optimize'};
> $ccflags =~ s/-MD\b/-MT/;
> $optimize =~ s/-MD\b/-MT/;
> $ccflags =~ s/-O1\b/-O2/;
> $optimize =~ s/-O1\b/-O2/;
>
> And everything works fine. Exactly what in $Config{'ccflags'} that was
> crucial I did not investigate. (But I don't use time_t.)
*Everyone* is using time_t if they are writing XS code. The interpreter
structure contains PL_basetime, which is of Time_t, which is #define'd
to be the same as time_t (look in intrpvar.h):
PERLVAR(Ibasetime, Time_t) /* $^T */
So if you use an incorrectly sized time_t, then all variables in the
Perl interpreter structure beyond PL_basetime will have the wrong offset
in your XS code and your extension will most likely crash.
Feel free to append -U_USE_32BIT_TIME_T again to the end of your CCFLAGS
to verify that this was indeed the problem. :)
Cheers,
-Jan
