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

Calculating dependencies ... done!
Dependency resolution took 1.01 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/xapian-1.4.29:0/30::gentoo  USE="-debug -static-libs" CPU_FLAGS_X86="sse sse2" 3175 KiB
[ebuild  N     ] app-text/xapian-omega-1.4.29::gentoo  576 KiB

Total: 2 packages (2 new), Size of downloads: 3750 KiB