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

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

[ebuild  N     ] x11-misc/util-macros-1.20.2::gentoo  82 KiB
[ebuild  N     ] media-libs/netpbm-11.16.1:0/advanced::gentoo  USE="X jpeg png tiff -postscript -rle -static-libs -test -xml" CPU_FLAGS_X86="sse2" 3753 KiB
[ebuild  N     ] x11-libs/libXaw3dXft-1.6.4::gentoo  USE="-xpm" 455 KiB
[ebuild  N     ] media-gfx/xpaint-3.1.4-r5::gentoo  USE="tiff -pgf" 1592 KiB

Total: 4 packages (4 new), Size of downloads: 5881 KiB