gistfile1.txt

$ sudo emerge --update --deep --newuse -v --with-bdeps=y @world --backtrack=300 -a

These are the packages that would be merged, in order:

Calculating dependencies... done!


[nomerge       ] app-crypt/libsecret-0.18.3::gentoo  USE="crypt introspection -debug {-test} -vala" 
[nomerge       ]  gnome-base/gnome-keyring-3.18.3::gentoo  USE="caps filecaps pam ssh-agent -debug (-selinux) {-test}" 
[ebuild  N     ]   app-crypt/pinentry-0.9.7::gentoo  USE="gnome-keyring gtk ncurses qt4 -caps -emacs -qt5 -static" 0 KiB
[ebuild  N     ]    app-crypt/gcr-3.18.0:0/1::gentoo  USE="gtk introspection -debug {-test} -vala" 1,281 KiB
[ebuild  N     ]     app-crypt/gnupg-2.1.10::gentoo  USE="bzip2 gnutls ldap nls readline usb -doc (-selinux) -smartcard -static -tofu -tools" 0 KiB
[ebuild  N     ]  gnome-base/gnome-keyring-3.18.3::gentoo  USE="caps filecaps pam ssh-agent -debug (-selinux) {-test}" 1,177 KiB
[nomerge       ] virtual/shadow-0::gentoo 
[nomerge       ]  sys-apps/shadow-4.2.1-r2::gentoo  USE="acl cracklib nls pam xattr -audit (-selinux) -skey" LINGUAS="-cs -da -de -es -fi -fr -hu -id -it -ja -ko -pl -pt_BR -ru -sv -tr -zh_CN -zh_TW" 
[ebuild   R    ]   sys-auth/pambase-20150213::gentoo  USE="consolekit cracklib gnome-keyring* nullok sha512 -debug -minimal -mktemp -pam_krb5 -pam_ssh -passwdqc -securetty (-selinux) -systemd" 0 KiB

Total: 5 packages (4 new, 1 reinstall), Size of downloads: 2,458 KiB

 * Error: circular dependencies:

(app-crypt/gnupg-2.1.10:0/0::gentoo, ebuild scheduled for merge) depends on
 (app-crypt/pinentry-0.9.7:0/0::gentoo, ebuild scheduled for merge) (buildtime)
  (app-crypt/gcr-3.18.0:0/1::gentoo, ebuild scheduled for merge) (runtime)
   (app-crypt/gnupg-2.1.10:0/0::gentoo, ebuild scheduled for merge) (buildtime)

 * Note that circular dependencies can often be avoided by temporarily
 * disabling USE flags that trigger optional dependencies.