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

Calculating dependencies ... done!
Dependency resolution took 1.00 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/libestr-0.1.11-r1::gentoo  USE="-debug -static-libs -test" 348 KiB
[ebuild  N     ] dev-libs/libfastjson-1.2609.0:0/4.3.0::gentoo  USE="-static-libs" 132 KiB
[ebuild  N     ] dev-libs/liblognorm-2.0.6-r1:0/5.1.0::gentoo  USE="-debug -doc -static-libs -test" 652 KiB

Total: 3 packages (3 new), Size of downloads: 1130 KiB