Comment 7 for bug 172400

Had the same problem yesterday and ended up doing the following:

1. copying PAM modules from a 32bit system into /lib32/security (as per comment #4)
2. editing the config file for the shoftware I wanted to use in /etc/pam.d to use absolute paths to /lib32/security
3. patch the 32bit libpam the hard way:

# cd ~
# cp /lib32/libpam.so.0.81.6 ~/libpam.so.0.81.6.orig
# sed 's/\/lib\/security/\/l32\/security/g' < libpam.so.0.81.6.orig > libpam.so.0.81.6.patched
# sudo cp libpam.so.0.81.6.patched /lib32/libpam.so.0.81.6
# sudo ln -s /lib32 /l32