Can anyone tell me where PV_sv_undef is suppose to be?
There is no P
V_sv_undef.
The symbol P
L_sv_undef is supposed to be somewhere in libperl.so (although not by that exact name).
It wasn't available in 5.004050 or earlier (can be made available through
Devel::PPPort to a certain extent).
Its defined in various perl include files (perlapi.h, embedvar.h),
you (ext/IO) get it by including perl.h/XSUB.h.
Your problem is that whatever perl is trying to load
'/usr/lib/perl5/5.8.7/i686-linux/auto/IO/IO.so'
doesn't define PL_sv_undef.
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