Virtualbox (version 6.1.16 r140961 (Qt5.6.2)) after installing Centos (7.8.2003 x86_64)
Opening two-way copy-paste and drag-and-drop files does not work properly.

After trying to install enhanced features, it still doesn't work.
Check the log and find:

Building the main Guest Additions 6.0.12 module for kernel 4.18.0-80.7.1.el8_0.x86_64.
Error building the module.  Build output follows.
make V=1 CONFIG_MODULE_SIG= -C /lib/modules/4.18.0-80.7.1.el8_0.x86_64/build M=/tmp/vbox.0 SRCROOT=/tmp/vbox.0 -j1 modules
Makefile:958: *** "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel".  Stop.
make: *** [/tmp/vbox.0/Makefile-footer.gmk:111: vboxguest] Error 2
Could not find the X.Org or XFree86 Window System, skipping.
modprobe vboxguest failed

The final solution is
`
sudo yum install elfutils-libelf-devel
`
Reference address:https://github.com/geerlingguy/packer-centos-8/issues/4