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

Calculating dependencies ... done!
Dependency resolution took 0.97 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/xerces-c-3.3.0:0/3.3::gentoo  USE="iconv threads -curl -doc -examples -icu -static-libs -test" CPU_FLAGS_X86="sse2" 4211 KiB

Total: 1 package (1 new), Size of downloads: 4211 KiB