sys-apps/util-linux[-2.23.2-r1] build aganst pam if pam present in system - it build & installs /sbin/runuser, linked with pam, just if sys-libs/pam installed. To security reasons I suggest to make usual USE=pam dependence, controlled by "export ac_cv_header_security_pam_misc_h=no". Attaching ebuild patch... Reproducible: Always
Created attachment 359132 [details, diff] util-linux pam dependence
Seems to be related to bug #484754
should be all set now in the tree; thanks for the report! Commit message: Add USE=pam to control runuser http://sources.gentoo.org/sys-apps/util-linux/metadata.xml?r1=1.15&r2=1.16 http://sources.gentoo.org/sys-apps/util-linux/util-linux-2.23.2-r1.ebuild?r1=1.1&r2=1.2