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

Calculating dependencies ... done!
Dependency resolution took 1.02 s (backtrack: 0/20).

[ebuild  N     ] media-libs/giflib-6.1.3:0/7::gentoo  USE="-doc -static-libs" 460 KiB
[ebuild  N     ] dev-perl/File-Which-1.270.0-r1::gentoo  USE="-pwhich -test" PERL_FEATURES="ithreads (-debug) -quadmath" 25 KiB
[ebuild  N     ] dev-perl/ExtUtils-PkgConfig-1.160.0-r1::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 10 KiB
[ebuild  N     ] dev-perl/GD-2.830.0-r1::gentoo  USE="truetype -animgif -examples -fcgi -test -xpm" PERL_FEATURES="ithreads (-debug) -quadmath" 281 KiB
[ebuild  N     ] dev-perl/GD-Barcode-2.10.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 877 KiB

Total: 5 packages (5 new), Size of downloads: 1651 KiB