<<< metadata_duplicate_useflag_description >>>
  sys-fs/btrfs-progs|static|base-system@gentoo.org
<<< packages_pkgcheck_scan >>>
    InternalEclassUsage: version 9999: autotools: internal usage: 'autotools_run_tool --at-output automake --print-libdir', line 117
<<< open bugs >>>
  https://bugs.gentoo.org/961969 sys-apps/util-linux_sys-fs/btrfs-progs-6.14:_Fails_to_build_when_using_-flto,_mold_and_USE=&quot;-udev&quot;_(mold:_error:_/usr/lib/libblkid.so:_--no-allow-shlib-undefined:_undefined_symbol:_reallocarray)