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

Calculating dependencies ... done!
Dependency resolution took 1.60 s (backtrack: 0/20).

[ebuild     U  ] sys-libs/glibc-2.44-r3:2.2::gentoo [2.43:2.2::gentoo] USE="cet multiarch ssp (static-libs) -audit -caps (-clang) -compile-locales (-custom-cflags) -doc -gd -hash-sysv-compat -headers-only (-multilib) -multilib-bootstrap -nscd -old-kernel% -perl -profile (-selinux) -sframe (-stack-realign) -suid (-systemd) -systemtap -test (-vanilla) -verify-sig" 20221 KiB

Total: 1 package (1 upgrade), Size of downloads: 20221 KiB