There is written in "2005.0 Upgrade guide" for amd64 (http://www.gentoo.org/proj/en/base/amd64/howtos/index.xml?part=1&chap=1) that multilib is now forced. But use.mask forces multilib NOT to be set. When I try "emerge -pv glibc" I can see "(-multilib)". I think there should be "-multilib" instead of "multilib" in use.mask. Reproducible: Always Steps to Reproduce: 1.Link /etc/make.profile to 2005.0 release #rm /etc/make.profile #ln -s /usr/portage/profiles/default-linux/amd64/2005.0 /etc/make.profile 2.Try to emerge glibc #emerge -pv glibc 3. Actual Results: [ebuild R ] sys-libs/glibc-2.3.4.20041102-r1 -build -debug -erandom -hardened (-multilib) +nls -nomalloccheck +nptl -nptlonly -pic +userlocales 0 kB Expected Results: (with 2004.3) [ebuild R ] sys-libs/glibc-2.3.4.20041102-r1 -build -debug -erandom -hardened +multilib* +nls -nomalloccheck +nptl -nptlonly -pic +userlocales 0 kB Portage 2.0.51.19 (default-linux/amd64/2005.0, gcc-3.4.3, glibc-2.3.4.20041102-r1, 2.6.11-gentoo-r3 x86_64) ================================================================= System uname: 2.6.11-gentoo-r3 x86_64 AMD Athlon(tm) 64 Processor 3000+ Gentoo Base System version 1.4.16 Python: dev-lang/python-2.3.4-r1 [2.3.4 (#1, Feb 8 2005, 10:09:58)] dev-lang/python: 2.3.4-r1 sys-devel/autoconf: 2.13, 2.59-r6 sys-devel/automake: 1.5, 1.8.5-r3, 1.6.3, 1.7.9-r1, 1.4_p6, 1.9.4 sys-devel/binutils: 2.15.92.0.2-r1 sys-devel/libtool: 1.5.10-r4 virtual/os-headers: 2.6.8.1-r4 ACCEPT_KEYWORDS="amd64" AUTOCLEAN="yes" CFLAGS="-O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.2/share/config /usr/kde/3.3/env /usr/kde/3.3/share/config /usr/kde/3.3/shutdown /usr/kde/3/share/config /usr/lib/X11/xkb /usr/lib/mozilla/defaults/pref /usr/share/config /usr/share/texmf/dvipdfm/config/ /usr/share/texmf/dvips/config/ /usr/share/texmf/tex/generic/config/ /usr/share/texmf/tex/platex/config/ /usr/share/texmf/xdvi/ /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-O2 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs autoconfig ccache distlocks sandbox strict" GENTOO_MIRRORS="http://src.gentoo.pl http://gentoo.prz.rzeszow.pl http://gentoo.zie.pg.gda.pl http://www.gigaload.org/gentoo.org/" LANG="pl_PL" LC_ALL="pl_PL" LINGUAS="pl" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/portage-overlay" SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage" USE="amd64 X Xaw3d a52 aac aalib acl acpi adns alsa apache2 apm arts audiofile avi bash-completition bcmath bitmap-fonts bluetooth bmp bonobo bzlib calendar caps cdb cdparanoia clibpdf crypt cscope ctype cups curl curlwrappers dba dbx dga dio directfb doc dv dvb dvd dvdread encode esd ethereal evo exif expat fam fastcgi fbcon ffmpeg fftw flac flash font-server foomaticdb fortran ftp gb gd gdbm geoip gif ginac glut gmp gnome gnustep gnutils gphoto2 gpm gstreamer gtk gtk2 gtkhtml guile hal howl hyperwave-api iconv imagemagick imlib inifile innodb iodbc ipv6 jabber java javascript jikes jp2 jpeg junit kde kdeenablefinal ladcca lcms lesstif libg++ libgda libwww lm_sensors lzw lzw-tiff m17n-lib mad maildir mailwrapper matroska mbox mcal mhash mikmod milter mime ming mmap mng mnogosearch motif mozilla mp3 mpeg mpi msession mysql mysqli nas ncurses nls nocardbus nptl odbc offensive ofx ogg oggvorbis openal opengl oss pam pcntl pcre pdflib perl php plotutils png pnp portaudio posix postgres ppds profile python qdbm qt quicktime readline recode ruby samba sasl sdl session sharedext sharedmem simplexml skey slang smartcard sndfile snmp soap sockets socks5 sox speex spell spl ssl svg sysvipc szip tcltk tcpd tetex theora threads tidy tiff tokenizer truetype truetype-fonts trusted type1-fonts unicode usb usepackagedmakefiles userlocales v4l vcd vhosts videos vorbis wddx wmf wxwindows xface xine xinerama xml xml2 xmlrpc xmms xosd xpm xprint xrandr xsl xv xvid yaz zeo zlib linguas_pl" Unset: ASFLAGS, CBUILD, CTARGET, LDFLAGS
(-multilib) just means it can't be selected enabled/disabled, but is forced on in base profile and off in no-multilib profile. See gentoo-amd64 mailing list's archives.