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

Calculating dependencies... done!
[ebuild  r  U  ] dev-libs/re2-2023.06.02:0/11::dev-kit [2023.03.01:0/10::dev-kit] USE="icu"
0 KiB
[ebuild  rR    ] dev-qt/qtwebengine-5.15.7-r2:5/5.15::qt-kit  USE="alsa jumbo-build kerberos
memsaver pulseaudio system-ffmpeg system-icu widgets -bindist -debug -designer -geolocation
-test" 0 KiB

Total: 2 packages (1 upgrade, 1 reinstall), Size of downloads: 0 KiB

The following packages are causing rebuilds:

 (dev-libs/re2-2023.06.02:0/11::dev-kit, ebuild scheduled for merge) causes rebuilds for:
   (dev-qt/qtwebengine-5.15.7-r2:5/5.15::qt-kit, ebuild scheduled for merge)

>>> Verifying ebuild manifests
>>> Emerging (1 of 2) dev-libs/re2-2023.06.02::dev-kit
>>> Failed to emerge dev-libs/re2-2023.06.02, Log file:
>>>  '/var/tmp/portage/dev-libs/re2-2023.06.02/temp/build.log'
>>> Jobs: 0 of 2 complete, 1 failed                 Load avg: 3.83, 3.81, 3.56

• Package:    dev-libs/re2-2023.06.02
• Repository: dev-kit
• USE:        amd64 elibc_glibc icu kernel_linux userland_GNU
• FEATURES:   network-sandbox preserve-libs sandbox userpriv usersandbox
  >>> Unpacking source...
  >>> Unpacking re2-2023.06.02.tar.gz to /var/tmp/portage/dev-libs/re2-2023.06.02/work
  /var/tmp/portage/dev-libs/re2-2023.06.02/work /var/tmp/portage/dev-libs/re2-2023.06.02/work
  /var/tmp/portage/dev-libs/re2-2023.06.02/work
  >>> Source unpacked in /var/tmp/portage/dev-libs/re2-2023.06.02/work
  >>> Preparing source in /var/tmp/portage/dev-libs/re2-2023.06.02/work/re2-2023.06.02 ...
  >>> Source prepared.
  >>> Configuring source in /var/tmp/portage/dev-libs/re2-2023.06.02/work/re2-2023.06.02 ...
  >>> Source configured.
  >>> Compiling source in /var/tmp/portage/dev-libs/re2-2023.06.02/work/re2-2023.06.02 ...
  make -j24 -l24 SONAME=11 shared  
  Package absl_base was not found in the pkg-config search path.
  Perhaps you should add the directory containing `absl_base.pc'
  to the PKG_CONFIG_PATH environment variable
  Package 'absl_base', required by 'virtual:world', not found
  Package 'absl_core_headers', required by 'virtual:world', not found
  Package 'absl_fixed_array', required by 'virtual:world', not found
  Package 'absl_flags', required by 'virtual:world', not found
  Package 'absl_flat_hash_map', required by 'virtual:world', not found
  Package 'absl_flat_hash_set', required by 'virtual:world', not found
  Package 'absl_inlined_vector', required by 'virtual:world', not found
  Package 'absl_optional', required by 'virtual:world', not found
  Package 'absl_span', required by 'virtual:world', not found
  Package 'absl_str_format', required by 'virtual:world', not found
  Package 'absl_strings', required by 'virtual:world', not found
  Package 'absl_synchronization', required by 'virtual:world', not found
  Package absl_base was not found in the pkg-config search path.
  Perhaps you should add the directory containing `absl_base.pc'
  to the PKG_CONFIG_PATH environment variable
  Package 'absl_base', required by 'virtual:world', not found
  Package 'absl_core_headers', required by 'virtual:world', not found
  Package 'absl_fixed_array', required by 'virtual:world', not found
  Package 'absl_flags', required by 'virtual:world', not found
  Package 'absl_flat_hash_map', required by 'virtual:world', not found
  Package 'absl_flat_hash_set', required by 'virtual:world', not found
  Package 'absl_inlined_vector', required by 'virtual:world', not found
  Package 'absl_optional', required by 'virtual:world', not found
  Package 'absl_span', required by 'virtual:world', not found
  Package 'absl_str_format', required by 'virtual:world', not found
  Package 'absl_strings', required by 'virtual:world', not found
  Package 'absl_synchronization', required by 'virtual:world', not found
  x86_64-pc-linux-gnu-g++ -c -o obj/so/util/rune.o -fPIC  -pthread -Wall -Wextra -Wno-unused-p
  arameter -Wno-missing-field-initializers -I.   -DRE2_USE_ICU  -march=znver3 -O2 -pipe -DNDEB
  UG util/rune.cc
  Package absl_base was not found in the pkg-config search path.
  Perhaps you should add the directory containing `absl_base.pc'
  to the PKG_CONFIG_PATH environment variable
  Package 'absl_base', required by 'virtual:world', not found
  Package 'absl_core_headers', required by 'virtual:world', not found
  Package 'absl_fixed_array', required by 'virtual:world', not found
  Package 'absl_flags', required by 'virtual:world', not found
  Package 'absl_flat_hash_map', required by 'virtual:world', not found
  Package 'absl_flat_hash_set', required by 'virtual:world', not found
  Package 'absl_inlined_vector', required by 'virtual:world', not found
  Package 'absl_optional', required by 'virtual:world', not found
  Package 'absl_span', required by 'virtual:world', not found
  Package 'absl_str_format', required by 'virtual:world', not found
  Package 'absl_strings', required by 'virtual:world', not found
  Package 'absl_synchronization', required by 'virtual:world', not found
  x86_64-pc-linux-gnu-g++ -c -o obj/so/util/strutil.o -fPIC  -pthread -Wall -Wextra -Wno-unuse
  d-parameter -Wno-missing-field-initializers -I.   -DRE2_USE_ICU  -march=znver3 -O2 -pipe -DN
  DEBUG util/strutil.cc
  Package absl_base was not found in the pkg-config search path.
  Perhaps you should add the directory containing `absl_base.pc'
  to the PKG_CONFIG_PATH environment variable
  Package 'absl_base', required by 'virtual:world', not found
  Package 'absl_core_headers', required by 'virtual:world', not found
  Package 'absl_fixed_array', required by 'virtual:world', not found
  Package 'absl_flags', required by 'virtual:world', not found
  Package 'absl_flat_hash_map', required by 'virtual:world', not found
  Package 'absl_flat_hash_set', required by 'virtual:world', not found
  Package 'absl_inlined_vector', required by 'virtual:world', not found
  Package 'absl_optional', required by 'virtual:world', not found
  Package 'absl_span', required by 'virtual:world', not found
  Package 'absl_str_format', required by 'virtual:world', not found
  Package 'absl_strings', required by 'virtual:world', not found
  Package 'absl_synchronization', required by 'virtual:world', not found
  x86_64-pc-linux-gnu-g++ -c -o obj/so/re2/bitmap256.o -fPIC  -pthread -Wall -Wextra -Wno-unus
  ed-parameter -Wno-missing-field-initializers -I.   -DRE2_USE_ICU  -march=znver3 -O2 -pipe -D
  NDEBUG re2/bitmap256.cc
  Package absl_base was not found in the pkg-config search path.
  Perhaps you should add the directory containing `absl_base.pc'
  to the PKG_CONFIG_PATH environment variable
  Package 'absl_base', required by 'virtual:world', not found
  In file included from ./re2/bitmap256.h:14,
                  from re2/bitmap256.cc:5:
  ./util/logging.h:16:10: fatal error: absl/base/attributes.h: No such file or directory
    16 | #include "absl/base/attributes.h"
       |          ^~~~~~~~~~~~~~~~~~~~~~~~
  compilation terminated.
  Package 'absl_core_headers', required by 'virtual:world', not found
  Package 'absl_fixed_array', required by 'virtual:world', not found
  Package 'absl_flags', required by 'virtual:world', not found
  Package 'absl_flat_hash_map', required by 'virtual:world', not found
  Package 'absl_flat_hash_set', required by 'virtual:world', not found
  Package 'absl_inlined_vector', required by 'virtual:world', not found
  Package 'absl_optional', required by 'virtual:world', not found
  Package 'absl_span', required by 'virtual:world', not found
  Package 'absl_str_format', required by 'virtual:world', not found
  Package 'absl_strings', required by 'virtual:world', not found
  Package 'absl_synchronization', required by 'virtual:world', not found
  make: *** [Makefile:213: obj/so/re2/bitmap256.o] Error 1
  make: *** Waiting for unfinished jobs....
  x86_64-pc-linux-gnu-g++ -c -o obj/so/re2/bitstate.o -fPIC  -pthread -Wall -Wextra -Wno-unuse
  d-parameter -Wno-missing-field-initializers -I.   -DRE2_USE_ICU  -march=znver3 -O2 -pipe -DN
  DEBUG re2/bitstate.cc
  In file included from re2/bitstate.cc:26:
  ./util/logging.h:16:10: fatal error: absl/base/attributes.h: No such file or directory
    16 | #include "absl/base/attributes.h"
       |          ^~~~~~~~~~~~~~~~~~~~~~~~
  compilation terminated.
  make: *** [Makefile:213: obj/so/re2/bitstate.o] Error 1
• ERROR: dev-libs/re2-2023.06.02::dev-kit failed (compile phase):
•   emake failed
•  
• If you need support, post the output of `emerge --info '=dev-libs/re2-2023.06.02::dev-kit
  '`,
• the complete build log and the output of `emerge -pqv '=dev-libs/re2-2023.06.02::dev-kit'
  `.
• The complete build log is located at '/var/tmp/portage/dev-libs/re2-2023.06.02/temp/build
  .log'.
• The ebuild environment file is located at '/var/tmp/portage/dev-libs/re2-2023.06.02/temp/
  environment'.
• Working directory: '/var/tmp/portage/dev-libs/re2-2023.06.02/work/re2-2023.06.02'
• S: '/var/tmp/portage/dev-libs/re2-2023.06.02/work/re2-2023.06.02'

* Messages for package dev-libs/re2-2023.06.02:

* ERROR: dev-libs/re2-2023.06.02::dev-kit failed (compile phase):
*   emake failed
*  
* If you need support, post the output of `emerge --info '=dev-libs/re2-2023.06.02::dev-kit
'`,
* the complete build log and the output of `emerge -pqv '=dev-libs/re2-2023.06.02::dev-kit'
`.
* The complete build log is located at '/var/tmp/portage/dev-libs/re2-2023.06.02/temp/build
.log'.
* The ebuild environment file is located at '/var/tmp/portage/dev-libs/re2-2023.06.02/temp/
environment'.
* Working directory: '/var/tmp/portage/dev-libs/re2-2023.06.02/work/re2-2023.06.02'
* S: '/var/tmp/portage/dev-libs/re2-2023.06.02/work/re2-2023.06.02'