>>> These are the packages that would be unmerged:

 virtual/udev
    selected: 217 
   protected: none 
     omitted: none 

 virtual/dev-manager
    selected: 0-r1 
   protected: none 
     omitted: none 

All selected packages: =virtual/dev-manager-0-r1 =virtual/udev-217

>>> 'Selected' packages are slated for removal.
>>> 'Protected' and 'omitted' packages will not be removed.

Would you like to unmerge these packages? [Yes/No] >>> Waiting 5 seconds before starting...
>>> (Control-C to abort)...
>>> Unmerging in: 5 4 3 2 1>>> Unmerging (1 of 2) virtual/udev-217...

No package files given... Grabbing a set.
>>> Regenerating /etc/ld.so.cache...
>>> Unmerging (2 of 2) virtual/dev-manager-0-r1...
No package files given... Grabbing a set.

 * GNU info directory index is up-to-date.

!!! existing preserved libs:
>>> package: sys-fs/eudev-3.2.5
 *  - /lib64/libudev.so.1
 *  - /lib64/libudev.so.1.6.3
 *      used by /lib64/dhcpcd/dev/udev.so (net-misc/dhcpcd-7.0.1)
 *      used by /usr/lib64/libpci.so.3.5.6 (sys-apps/pciutils-3.5.6)
 *      used by /usr/sbin/mkfs.fat (sys-fs/dosfstools-4.0-r1)
Use emerge @preserved-rebuild to rebuild packages using these libraries