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

Calculating dependencies ... done!
Dependency resolution took 1.04 s (backtrack: 0/20).

[ebuild  N     ] mail-client/mailx-support-20060102-r3::gentoo  9 KiB
[ebuild  N     ] net-libs/liblockfile-1.17::gentoo  USE="-static-libs" 69 KiB
[ebuild  N     ] mail-client/mailx-8.1.2.20220412::gentoo  127 KiB

Total: 3 packages (3 new), Size of downloads: 203 KiB