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

Calculating dependencies ... done!
Dependency resolution took 1.08 s (backtrack: 0/20).

[ebuild  N     ] dev-cpp/cpp-httplib-0.51.0:0/0.51::gentoo  USE="ssl zlib -brotli -mbedtls -test -zstd" 1861 KiB

Total: 1 package (1 new), Size of downloads: 1861 KiB