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

Calculating dependencies ... done!
Dependency resolution took 1.12 s (backtrack: 0/20).

[ebuild  N     ] net-libs/libbloom-1.6::gentoo  1829 KiB
[ebuild  N     ] net-libs/mbedtls-2.28.10:0/7.14.1::gentoo  USE="threads -cmac -doc -havege -programs -static-libs -test -zlib" CPU_FLAGS_X86="sse2" 3408 KiB
[ebuild  N     ] dev-libs/libev-4.33::gentoo  USE="-static-libs" 557 KiB
[ebuild  N     ] dev-libs/check-0.15.2-r2::gentoo  USE="-doc -subunit -test" 299 KiB
[ebuild  N     ] net-libs/libcork-0.15.0-r3::gentoo  USE="-static-libs" 179 KiB
[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     ] net-libs/libcorkipset-1.1.1.20150311_p8-r1::gentoo  77 KiB
[ebuild  N     ] net-proxy/shadowsocks-libev-3.3.6-r1::gentoo  USE="-debug -doc" 323 KiB

Total: 8 packages (8 new), Size of downloads: 8210 KiB