For a time ago I was happy to migrate on sys-fs/eudev. On last (2015-12-11 portage sync) update I find newly stabilized =sys-fs/eudev-3.1.5 incompatible with my desktop installation. The error is: # emerge -uDN world These are the packages that would be merged, in order: Calculating dependencies... done! !!! Multiple package instances within a single package slot have been pulled !!! into the dependency graph, resulting in a slot conflict: sys-fs/eudev:0 (sys-fs/eudev-3.1.5:0/0::gentoo, ebuild scheduled for merge) pulled in by (no parents that aren't satisfied by other packages in this slot) (sys-fs/eudev-3.1.2:0/0::gentoo, installed) pulled in by >=sys-fs/eudev-1.5.3-r1:0/0[abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?,gudev(-),introspection(-)?,static-libs?] required by (virtual/libgudev-215-r3:0/0::gentoo, installed) It may be possible to solve this problem by using package.mask to prevent one of those packages from being selected. However, it is also possible that conflicting dependencies exist such that they are impossible to satisfy simultaneously. If such a conflict exists in the dependencies of two different packages, then those packages can not be installed simultaneously. For more information, see MASKED PACKAGES section in the emerge man page or refer to the Gentoo Handbook. emerge: there are no ebuilds built with USE flags to satisfy ">=sys-fs/udev-208-r1:0/0[abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?,gudev(-),introspection(-)?,static-libs?]". !!! One of the following packages is required to complete your request: - sys-fs/udev-216::gentoo (Change USE: +gudev) (dependency required by "virtual/libgudev-215-r3::gentoo" [installed]) (dependency required by "sys-fs/udisks-2.1.4::gentoo" [installed]) (dependency required by "app-emulation/wine-1.6.2::gentoo[udisks]" [installed]) (dependency required by "@selected" [set]) (dependency required by "@world" [argument]) Further analyze showed the following: Currently installed version: # equery u =sys-fs/eudev-3.1.2 … * Found these USE flags for sys-fs/eudev-3.1.2: U I - - abi_x86_32 : 32-bit (x86) libraries - - doc : Add extra documentation (API, Javadoc, etc). It is recommended to enable per package instead of globally + + gudev : enable libudev gobject interface + + hwdb : read vendor/device string database and add it to udev database - - introspection : Use dev-libs/gobject-introspection for introspection + + kmod : enable module loading through libkmod - - static-libs : Build static versions of dynamic libraries as well - - test : Workaround to pull in packages needed to run with FEATURES=test. Portage-2.1.2 handles this internally, so don't set it in make.conf/package.use anymore Latest stable: # equery u =sys-fs/eudev-3.1.5 … * Found these USE flags for sys-fs/eudev-3.1.5: U I - - abi_x86_32 : 32-bit (x86) libraries + - hwdb : read vendor/device string database and add it to udev database - - introspection : Use dev-libs/gobject-introspection for introspection + - kmod : enable module loading through libkmod - - rule-generator : install legacy rule generator rules and support scripts - note that the functionality within was dropped from sys-fs/udev as it is not stable in all cases; use at your own risk - - static-libs : Build static versions of dynamic libraries as well - - test : Workaround to pull in packages needed to run with FEATURES=test. Portage-2.1.2 handles this internally, so don't set it in make.conf/package.use anymore In latest stable was removed gudev USE flag, so it can't satisfy dependency on sys-fs/eudev[gudev]. $ einfo Portage 2.2.24 (python 3.4.3-final-0, default/linux/amd64/13.0, gcc-4.9.3, glibc-2.21-r1, 4.1.12-aufs x86_64) ================================================================= System uname: Linux-4.1.12-aufs-x86_64-Intel-R-_Core-TM-_i5_CPU_661_@_3.33GHz-with-gentoo-2.2 KiB Mem: 7976792 total, 4470900 free KiB Swap: 4024240 total, 4024240 free Timestamp of repository gentoo: Sun, 13 Dec 2015 10:15:01 +0000 sh bash 4.3_p39 ld GNU ld (Gentoo 2.25.1 p1.1) 2.25.1 app-shells/bash: 4.3_p39::gentoo dev-java/java-config: 2.2.0::gentoo dev-lang/perl: 5.20.2::gentoo dev-lang/python: 2.7.10-r1::gentoo, 3.4.3::gentoo dev-util/cmake: 3.3.1-r1::gentoo dev-util/pkgconfig: 0.28-r2::gentoo sys-apps/baselayout: 2.2::gentoo sys-apps/openrc: 0.18.4::gentoo sys-apps/sandbox: 2.6-r1::gentoo sys-devel/autoconf: 2.13::gentoo, 2.69::gentoo sys-devel/automake: 1.11.6-r1::gentoo, 1.13.4::gentoo, 1.14.1::gentoo, 1.15::gentoo sys-devel/binutils: 2.25.1-r1::gentoo sys-devel/gcc: 4.9.3::gentoo sys-devel/gcc-config: 1.7.3::gentoo sys-devel/libtool: 2.4.6::gentoo sys-devel/make: 4.1-r1::gentoo sys-kernel/linux-headers: 3.18::gentoo (virtual/os-headers) sys-libs/glibc: 2.21-r1::gentoo Repositories: gentoo location: /usr/portage/gentoo sync-type: rsync sync-uri: rsync://mirror.yandex.ru/gentoo-portage/ priority: -1000 local_home location: /usr/portage/local masters: gentoo rion location: /usr/portage/layman/rion masters: gentoo priority: 0 ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA GPL*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=native -O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /etc/conf.d/clock /etc/rc.conf /usr/lib64/libreoffice/program/sofficerc /usr/share/gnupg/qualified.txt /var/bind" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.6/ext-active/ /etc/php/cgi-php5.6/ext-active/ /etc/php/cli-php5.6/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c" CXXFLAGS="-march=native -O2 -pipe" DISTDIR="/usr/portage/distfiles/" EMERGE_DEFAULT_OPTS="--ask=y --verbose --autounmask=n" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs buildsyspkg config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="ftp://xeon.gentoo.ru/mirrors/gentoo/distfiles/ ftp://mirror2.corbina.ru/gentoo-distfiles/ http://mirror2.corbina.ru/gentoo-distfiles/ http://mirror.yandex.ru/gentoo-distfiles/ ftp://mirror.yandex.ru/gentoo-distfiles/ http://gentoo.bloodhost.ru/ ftp://gentoo.bloodhost.ru/ distfiles.gentoo.org" LANG="ru_RU.UTF8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages/" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" USE="X a52 acl alsa amd64 berkdb bzip2 cairo cdr cli consolekit cracklib crypt cups cxx dbus djvu dri dv dvd ffmpeg flac fortran gdbm gif gtk iconv icu jpeg jpeg2k kpathsea mac mmx mmxext modules mp3 mpeg multilib ncurses nls nptl ogg openmp pam pcre pdf png policykit qt3support readline seccomp session sse sse2 ssl tcpd tiff truetype unicode utf8 v4l v4l2 vorbis x264 xattr zlib" ABI_X86="64" ALSA_CARDS="hda-intel" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="aes mmx mmxext popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3" ELIBC="glibc" FOO2ZJS_DEVICES="hp1018" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="ru" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_4" QEMU_SOFTMMU_TARGETS="i386" QEMU_USER_TARGETS="i386" RUBY_TARGETS="ruby20 ruby21" SANE_BACKENDS="genesys" USERLAND="GNU" VIDEO_CARDS="intel" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" Unset: CC, CPPFLAGS, CTARGET, CXX, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
This will be fixed once virtual/libgudev-230 is stable.
Update with monday's (2015-12-14) portage snapshot showed thi bug fixed.
