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

Calculating dependencies ... done!
Dependency resolution took 1.07 s (backtrack: 0/20).

[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     ] sys-libs/slang-2.3.3-r2::gentoo  USE="pcre png readline zlib -cjk -static-libs" 1608 KiB
[ebuild  N     ] app-shells/pdmenu-1.3.6::gentoo  USE="gpm nls -examples" 157 KiB

Total: 3 packages (3 new), Size of downloads: 3307 KiB