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

Calculating dependencies ... done!
Dependency resolution took 1.03 s (backtrack: 0/20).

[ebuild  N     ] dev-perl/Config-Simple-4.590.0-r2::gentoo  PERL_FEATURES="ithreads (-debug) -quadmath" 21 KiB
[ebuild  N     ] app-arch/pigz-2.8::gentoo  USE="-static -test -verify-sig" 119 KiB
[ebuild  N     ] dev-perl/BSD-Resource-1.291.100-r3::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 67 KiB
[ebuild  N     ] dev-util/kup-0.3.6-r8::gentoo  USE="-gitolite" 41 KiB

Total: 4 packages (4 new), Size of downloads: 246 KiB