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

Calculating dependencies ... done!
Dependency resolution took 4.92 s (backtrack: 4/20).

[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     ] virtual/perl-parent-0.244.0-r1::gentoo  0 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-2.0.0-r1::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 866 KiB

Total: 6 packages (6 new), Size of downloads: 1640 KiB

WARNING: One or more updates/rebuilds have been skipped due to a dependency conflict:

dev-lang/perl:0

  (dev-lang/perl-5.44.0:0/5.44::gentoo, ebuild scheduled for merge) USE="gdbm -berkdb -doc -minimal" PERL_FEATURES="ithreads (-debug) -quadmath" conflicts with
    =dev-lang/perl-5.42* required by (virtual/perl-JSON-PP-4.160.0-r4:0/0::gentoo, ebuild scheduled for merge) USE=""
    ^              ^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-IO-1.550.0-r1:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-File-Path-2.180.0-r4:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-Text-ParseWords-3.310.0-r4:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-Encode-3.210.0-r2:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-Digest-MD5-2.590.0:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-Carp-1.540.0-r2:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-File-Spec-3.940.0:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-XSLoader-0.320.0-r2:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-ExtUtils-ParseXS-3.570.0:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-Storable-3.370.0:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-Digest-SHA-6.40.0-r2:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-ExtUtils-MakeMaker-7.760.0:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-CPAN-Meta-2.150.10-r11:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-Exporter-5.790.0:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-libnet-3.150.0-r2:0/0::gentoo, installed) USE="ssl"
    ^              ^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-podlators-6.0.2:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-IO-1.550.0-r1:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-File-Path-2.180.0-r4:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-ExtUtils-CBuilder-0.280.242-r2:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-Module-Metadata-1.0.38-r1:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-Digest-MD5-2.590.0:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-Scalar-List-Utils-1.680.100_rc:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-version-0.993.300:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-Test-Harness-3.500.0-r1:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-File-Spec-3.940.0:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-XSLoader-0.320.0-r2:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-Encode-3.210.0-r2:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-Text-ParseWords-3.310.0-r4:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-ExtUtils-ParseXS-3.570.0:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-Storable-3.370.0:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-Digest-SHA-6.40.0-r2:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-Carp-1.540.0-r2:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-ExtUtils-MakeMaker-7.760.0:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-CPAN-Meta-2.150.10-r11:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-Exporter-5.790.0:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-Module-Metadata-1.0.38-r1:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-Scalar-List-Utils-1.680.100_rc:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-ExtUtils-CBuilder-0.280.242-r2:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-libnet-3.150.0-r2:0/0::gentoo, installed) USE="ssl"
                 ^^^^^^^^
    dev-lang/perl:0/5.42= required by (virtual/perl-podlators-6.0.2:0/0::gentoo, installed) USE=""
                 ^^^^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-Test-Harness-3.500.0-r1:0/0::gentoo, installed) USE=""
    ^              ^^^^^
    =dev-lang/perl-5.42* required by (virtual/perl-version-0.993.300:0/0::gentoo, installed) USE=""
    ^              ^^^^^


!!! The following update(s) have been skipped due to unsatisfied dependencies
!!! triggered by backtracking:

virtual/perl-Math-BigInt:0