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

Calculating dependencies ... done!
Dependency resolution took 1.53 s (backtrack: 0/20).

[ebuild     U  ] dev-libs/libgcrypt-1.12.3-r1:0/20::gentoo [1.12.1:0/20::gentoo] USE="asm getentropy -doc -static-libs (-verify-sig)" CPU_FLAGS_X86="aes avx avx2 avx512f sse4_1 -padlock -sha" 4368 KiB

Total: 1 package (1 upgrade), Size of downloads: 4368 KiB