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

Calculating dependencies ... done!
Dependency resolution took 1.66 s (backtrack: 0/20).

[ebuild     U  ] dev-libs/elfutils-0.196-r2::gentoo [0.194::gentoo] USE="bzip2 debuginfod libarchive lzma nls threads%* utils -libpfm% -stackprof% -static-libs -test -valgrind -verify-sig -zstd (-stacktrace%)" 11881 KiB
[ebuild  N     ] x11-libs/libpciaccess-0.19::gentoo  USE="zlib -static-libs" 64 KiB
[ebuild  N     ] sys-apps/hwloc-2.12.2:0/15::gentoo  USE="X cairo cpuid pci -cuda -debug -doc -l0 -nvml -rocm (-selinux) -static-libs -svg -udev -valgrind -xml" VIDEO_CARDS="-nvidia" 5504 KiB
[ebuild  N     ] dev-cpp/tbb-2023.1.0:0/12.2.3::gentoo  USE="-test" 7542 KiB
[ebuild  N     ] dev-util/libabigail-3.0:0/10::gentoo  USE="threads -btf -debug -doc -test" 485132 KiB

Total: 5 packages (1 upgrade, 4 new), Size of downloads: 510122 KiB