Needed by gdm
This package was never stable, and cannot be required directly as it is pam module. No idea why it is required by gdm.
It's required by the gdm pam module (the exherbo one in this case): $ grep -r pkcs11 * data/pam-exherbo/gdm-smartcard.pam:auth [success=done ignore=ignore default=die] pam_pkcs11.so wait_for_card card_only data/pam-lfs/gdm-smartcard.pam:auth requisite pam_pkcs11.so wait_for_card card_only data/pam-lfs/gdm-smartcard.pam:password required pam_pkcs11.so gui/simple-greeter/extensions/smartcard/gdm-smartcard-manager.c:#define GDM_SMARTCARD_MANAGER_DRIVER LIBDIR"/pkcs11/libcoolkeypk11.so"
+ 07 Nov 2013; Pacho Ramos <pacho@gentoo.org> gdm-3.8.4-r3.ebuild, metadata.xml: + Remove smartcard USE flag and its pulled rdeps (#488784 by Alon Bar-Lev) +