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

Calculating dependencies ... done!
Dependency resolution took 1.08 s (backtrack: 0/20).

[ebuild  N     ] acct-group/atheme-services-0-r3::gentoo  0 KiB
[ebuild  N     ] dev-libs/libmowgli-2.1.3-r3:2::gentoo  USE="ssl" 223 KiB
[ebuild  N     ] acct-user/atheme-services-0-r3::gentoo  0 KiB
[ebuild  N     ] dev-libs/libpcre-8.45-r4:3::gentoo  USE="bzip2 cxx jit pcre16 readline (unicode) zlib -libedit -pcre32 -static-libs -valgrind" 1542 KiB
[ebuild  N     ] net-irc/atheme-services-7.2.12-r7::gentoo  USE="nls pcre ssl -cracklib -largenet -ldap -perl -profile" 1048 KiB

Total: 5 packages (5 new), Size of downloads: 2813 KiB