I looked a lttle harder and it seems the arch dirs are defined to be the same as non-archdirs (this is Debian Testing, BTW):

perl -V (with snippage): 

Summary of my perl5 (revision 5 version 8 subversion 8) configuration:
  Platform:
    osname=linux, osvers=2.6.18-1-amd64, archname=x86_64-linux-gnu-thr
+ead-multi
    uname='linux gkar 2.6.18-1-amd64 #1 smp sat oct 21 18:36:02 cest 2
+006 x86_64 \
    gnulinux '
    config_args='-Dusethreads -Duselargefiles -Dccflags=-DDEBIAN \
    -Dcccdlflags=-fPIC -Darchname=x86_64-linux-gnu -Dprefix=/usr \
    -Dprivlib=/usr/share/perl/5.8 -Darchlib=/usr/lib/perl/5.8 \
    -Dvendorprefix=/usr -Dvendorlib=/usr/share/perl5 -Dvendorarch=/usr
+/lib/perl5 \
    -Dsiteprefix=/usr/local -Dsitelib=/usr/local/share/perl/5.8.8 \
    -Dsitearch=/usr/local/lib/perl/5.8.8 -Dman1dir=/usr/share/man/man1

  @INC:
    /home/zippy/scripts/lib
    /etc/perl
    /usr/local/lib/perl/5.8.8
    /usr/local/share/perl/5.8.8
    /usr/lib/perl5
    /usr/share/perl5
    /usr/lib/perl/5.8
    /usr/share/perl/5.8
    /usr/local/lib/site_perl
    .

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In reply to Re^3: "use lib" and architecture-specific paths by FunkyMonk
in thread "use lib" and architecture-specific paths by perrin

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