* Checking for suitable kernel configuration options ...                                                                                                                              [ ok ]
>>> Emerging (1 of 132) dev-ruby/bundler-2.1.4::gentoo
>>> Emerging (2 of 132) app-accessibility/at-spi2-core-2.44.1::gentoo
>>> Failed to emerge dev-ruby/bundler-2.1.4, Log file:
>>>  '/var/tmp/portage/dev-ruby/bundler-2.1.4/temp/build.log'
>>> Installing (2 of 132) app-accessibility/at-spi2-core-2.44.1::gentoo
>>> Jobs: 1 of 132 complete, 1 failed               Load avg: 1.24, 1.15, 1.18
*** Resuming merge...

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

Calculating dependencies... done!
 * Package:    dev-ruby/bundler-2.1.4
 * Repository: gentoo
 * Maintainer: ruby@gentoo.org
 * USE:        abi_x86_64 amd64 doc elibc_glibc kernel_linux ruby_targets_ruby27 userland_GNU
 * FEATURES:   network-sandbox preserve-libs sandbox userpriv usersandbox
>>> Unpacking source...
 * Running unpack phase for all ...
 * Unpacking .gem file...
 * Uncompressing metadata
 * Unpacking data.tar.gz
 [ ok ]
>>> Source unpacked in /var/tmp/portage/dev-ruby/bundler-2.1.4/work
>>> Preparing source in /var/tmp/portage/dev-ruby/bundler-2.1.4/work ...
 * Running prepare phase for all ...
 [ ok ]
 * Running prepare phase for all ...
 [ !! ]
 * Running source copy phase for ruby27 ...
 [ ok ]
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/dev-ruby/bundler-2.1.4/work ...
 * Running configure phase for ruby27 ...
 [ ok ]
>>> Source configured.
>>> Compiling source in /var/tmp/portage/dev-ruby/bundler-2.1.4/work ...
 * Running compile phase for ruby27 ...
 [ ok ]
 * Running compile phase for all ...
/var/tmp/portage/dev-ruby/bundler-2.1.4/temp/environment: line 674: rdoc: command not found
 * ERROR: dev-ruby/bundler-2.1.4::gentoo failed (compile phase):
 *   failed to (re)build documentation
 *
 * Call stack:
 *     ebuild.sh, line  127:  Called src_compile
 *   environment, line 2164:  Called ruby-ng_src_compile
 *   environment, line 1764:  Called _ruby_invoke_environment 'all' 'all_ruby_compile'
 *   environment, line  604:  Called all_ruby_compile
 *   environment, line  713:  Called all_fakegem_compile
 *   environment, line  674:  Called die
 * The specific snippet of code:
 *                   rdoc ${RUBY_FAKEGEM_DOC_SOURCES} || die "failed to (re)build documentation";
 *
 * If you need support, post the output of `emerge --info '=dev-ruby/bundler-2.1.4::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=dev-ruby/bundler-2.1.4::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/dev-ruby/bundler-2.1.4/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-ruby/bundler-2.1.4/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-ruby/bundler-2.1.4/work/all/bundler-2.1.4'
 * S: '/var/tmp/portage/dev-ruby/bundler-2.1.4/work/all/bundler-2.1.4'

 * Messages for package dev-ruby/bundler-2.1.4:

 * ERROR: dev-ruby/bundler-2.1.4::gentoo failed (compile phase):
 *   failed to (re)build documentation
 *
 * Call stack:
 *     ebuild.sh, line  127:  Called src_compile
 *   environment, line 2164:  Called ruby-ng_src_compile
 *   environment, line 1764:  Called _ruby_invoke_environment 'all' 'all_ruby_compile'
 *   environment, line  604:  Called all_ruby_compile
 *   environment, line  713:  Called all_fakegem_compile
 *   environment, line  674:  Called die
 * The specific snippet of code:
 *                   rdoc ${RUBY_FAKEGEM_DOC_SOURCES} || die "failed to (re)build documentation";
 *
 * If you need support, post the output of `emerge --info '=dev-ruby/bundler-2.1.4::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=dev-ruby/bundler-2.1.4::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/dev-ruby/bundler-2.1.4/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-ruby/bundler-2.1.4/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-ruby/bundler-2.1.4/work/all/bundler-2.1.4'
 * S: '/var/tmp/portage/dev-ruby/bundler-2.1.4/work/all/bundler-2.1.4'
 * One or more packages are either masked or have missing dependencies:
 *
 *   dev-libs/libffi:0/7= pulled in by:
 *     (dev-lang/ruby-2.6.10:2.6/2.6::gentoo, installed)
 *
 *   virtual/rubygems[ruby_targets_ruby26(-)] pulled in by:
 *     (dev-ruby/bundler-2.1.4:2/2::gentoo, installed)
 *
 * The resume list contains packages that are either masked or have
 * unsatisfied dependencies. Please restart/continue the operation
 * manually, or use --skipfirst to skip the first package in the list and
 * any other packages that may be masked or have missing dependencies.
 *
 * The following package has failed to build, install, or execute postinst:
 *
 *  (dev-ruby/bundler-2.1.4:2/2::gentoo, ebuild scheduled for merge), Log file:
 *   '/var/tmp/portage/dev-ruby/bundler-2.1.4/temp/build.log'
 *

 * GNU info directory index is up-to-date.

!!! existing preserved libs:
>>> package: dev-libs/boost-1.79.0
 *  - /usr/lib64/libboost_atomic.so.1.78.0
 *  - /usr/lib64/libboost_filesystem.so.1.78.0
 *      used by /usr/lib64/liborcus-0.16.so.0 (preserved)
 *      used by /usr/lib64/liborcus-0.16.so.0.0.0 (preserved)
 *      used by /usr/lib64/liborcus-parser-0.16.so.0 (preserved)
 *      used by /usr/lib64/liborcus-parser-0.16.so.0.0.0 (preserved)
 *  - /usr/lib64/libboost_iostreams.so.1.78.0
 *      used by /usr/lib64/liborcus-0.16.so.0 (preserved)
 *      used by /usr/lib64/liborcus-0.16.so.0.0.0 (preserved)
 *  - /usr/lib64/libboost_locale.so.1.78.0
 *      used by /usr/lib64/libreoffice/program/libmergedlo.so (app-office/libreoffice-bin-7.2.6.2)
 *  - /usr/lib64/libboost_system.so.1.78.0
>>> package: dev-libs/libffi-3.4.2-r1
 *  - /usr/lib64/libffi.so.7
 *  - /usr/lib64/libffi.so.7.1.0
 *      used by /usr/lib/llvm/11/lib64/libLLVM-11.so (sys-devel/llvm-11.1.0)
 *      used by /usr/lib/llvm/12/lib64/libLLVM-12.so (sys-devel/llvm-12.0.1)
 *      used by /usr/lib/llvm/13/lib64/libLLVM-13.so (sys-devel/llvm-13.0.1)
 *      used by /usr/lib/python3.10/lib-dynload/_ctypes.cpython-310-x86_64-linux-gnu.so (dev-lang/python-3.10.4)
 *      used by /usr/lib/python3.8/lib-dynload/_ctypes.cpython-38-x86_64-linux-gnu.so (dev-lang/python-3.8.9_p2)
 *      used by /usr/lib/python3.9/lib-dynload/_ctypes.cpython-39-x86_64-linux-gnu.so (dev-lang/python-3.9.12)
 *      used by /usr/lib/python3.9/site-packages/_cffi_backend.cpython-39-x86_64-linux-gnu.so (dev-python/cffi-1.15.0)
 *      used by /usr/lib/python3.9/site-packages/gi/_gi.cpython-39-x86_64-linux-gnu.so (dev-python/pygobject-3.42.0)
 *      used by /usr/lib64/libgobject-2.0.so.0.7000.4 (dev-libs/glib-2.70.4)
 *      used by /usr/lib64/ruby/2.6.0/x86_64-linux/fiddle.so (dev-lang/ruby-2.6.10)
>>> package: dev-libs/liborcus-0.17.2
 *  - /usr/lib64/liborcus-0.16.so.0
 *  - /usr/lib64/liborcus-0.16.so.0.0.0
 *      used by /usr/lib64/libreoffice/program/libcuilo.so (app-office/libreoffice-bin-7.2.6.2)
 *      used by /usr/lib64/libreoffice/program/libmergedlo.so (app-office/libreoffice-bin-7.2.6.2)
 *      used by /usr/lib64/libreoffice/program/libscfiltlo.so (app-office/libreoffice-bin-7.2.6.2)
 *  - /usr/lib64/liborcus-parser-0.16.so.0
 *  - /usr/lib64/liborcus-parser-0.16.so.0.0.0
 *      used by /usr/lib64/libreoffice/program/libcuilo.so (app-office/libreoffice-bin-7.2.6.2)
 *      used by /usr/lib64/libreoffice/program/libmergedlo.so (app-office/libreoffice-bin-7.2.6.2)
 *      used by /usr/lib64/libreoffice/program/libscfiltlo.so (app-office/libreoffice-bin-7.2.6.2)
 *      used by /usr/lib64/libreoffice/program/libsclo.so (app-office/libreoffice-bin-7.2.6.2)
Use emerge @preserved-rebuild to rebuild packages using these libraries