i have the same problem, so i tried equo, as you suggest...that is:
localhost ~ # equo config dev-db/mysql
>> # (1/1) dev-db/mysql-5.5.22-r1 | Installato da: sabayon-weekly
>> ## Configurazione pacchetto: dev-db/mysql-5.5.22-r1
>> ## SPM: fase di configurazione
* Please provide a password for the mysql 'root' user now, in the
* MYSQL_ROOT_PASSWORD env var or through the /root/.my.cnf file.
* Avoid ["'\_%] characters in the password
>
* Retype the password
>
* ERROR: dev-db/mysql-5.5.22-r1 failed (config phase):
* Failed to run mysql_install_db. Please review /var/log/mysql/mysqld.err AND /tmp/tmp4iQ_Rk/portage/dev-db/mysql-5.5.22-r1/temp/mysql_install_db.log
*
* Call stack:
* ebuild.sh, line 85: Called pkg_config
* environment, line 3441: Called mysql-v2_pkg_config
* environment, line 3095: Called die
* The specific snippet of code:
* die "Failed to run mysql_install_db. Please review ${EPREFIX}/var/log/mysql/mysqld.err AND ${TMPDIR}/mysql_install_db.log";
*
* If you need support, post the output of `emerge --info '=dev-db/mysql-5.5.22-r1'`,
* the complete build log and the output of `emerge -pqv '=dev-db/mysql-5.5.22-r1'`.
* The complete build log is located at '/tmp/tmp4iQ_Rk/portage/dev-db/mysql-5.5.22-r1/temp/build.log'.
* The ebuild environment file is located at '/tmp/tmp4iQ_Rk/portage/dev-db/mysql-5.5.22-r1/temp/environment'.
* Working directory: '/tmp/tmp4iQ_Rk/portage/dev-db/mysql-5.5.22-r1/temp'
* S: '/tmp/tmp4iQ_Rk/portage/dev-db/mysql-5.5.22-r1/work/mysql-5.5.22'
>> ## E' avvenuto un errore. Azione abortita.
>> @@ Ricerca file di configurazione completata.
localhost ~ # then i did :
localhost ~ # emerge --info '=dev-db/mysql-5.5.22-r1'
Portage 2.2.0_alpha123 (default/linux/amd64/10.0/desktop, gcc-4.6.3-vanilla, glibc-2.15-r2, 3.5.0-sabayon x86_64)
=================================================================
System Settings
=================================================================
System uname: Linux-3.5.0-sabayon-x86_64-Intel-R-_Core-TM-2_Duo_CPU_T5800_@_2.00GHz-with-gentoo-2.2
Timestamp of tree: Thu, 30 Aug 2012 13:45:01 +0000
app-shells/bash: 4.2_p37
dev-java/java-config: 2.1.12
dev-lang/python: 2.7.3-r2
dev-util/cmake: 2.8.9
dev-util/pkgconfig: 0.27.1
sys-apps/baselayout: 2.2::sabayon-distro
sys-apps/openrc: 0.10.5::sabayon-distro
sys-apps/sandbox: 2.6
sys-devel/autoconf: 2.13, 2.68
sys-devel/automake: 1.9.6-r3, 1.10.2, 1.11.1
sys-devel/binutils: 2.22-r1
sys-devel/gcc: 4.6.3::sabayon-distro
sys-devel/gcc-config: 1.7.3
sys-devel/libtool: 2.4-r1
sys-devel/make: 3.82-r1
sys-kernel/linux-headers: 3.1 (virtual/os-headers)
sys-libs/glibc: 2.15-r2::sabayon-distro
Repositories: gentoo
Installed sets: @system
ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="* -@EULA"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -march=x86-64 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /etc/conf.d /etc/entropy /etc/init.d /usr/share/config /usr/share/config/kdm /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.3/ext-active/ /etc/php/apache2-php5.4/ext-active/ /etc/php/cgi-php5.3/ext-active/ /etc/php/cgi-php5.4/ext-active/ /etc/php/cli-php5.3/ext-active/ /etc/php/cli-php5.4/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/skel /etc/splash /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c"
CXXFLAGS="-O2 -march=x86-64 -pipe"
DISTDIR="/usr/portage/distfiles"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs ccache config-protect-if-modified distlocks ebuild-locks fixlafiles news parallel-fetch parse-eapi-ebuild-head preserve-libs protect-owned sandbox sfperms splitdebug strict unknown-features-warn unmerge-logs unmerge-orphans userfetch"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="ftp://mirrors.tera-byte.com/pub/gentoo
ftp://ftp.spline.inf.fu-berlin.de/mirrors/gentoo/ http://archive.mmu.edu.my/gentoo rsync://gentoo.bloodhost.ru/gentoo-distfiles ftp://gentoo.mirrors.tds.net/gentoo ftp://ftp.halifax.rwth-aachen.de/gentoo/ rsync://mirror.neolabs.kz/gentoo http://ftp.gentoo.bg/ http://ftp.cc.uoc.gr/mirrors/linux/gentoo/ ftp://ftp.cc.uoc.gr/mirrors/linux/gentoo/"
LANG="it_IT.UTF-8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
LINGUAS="en en_US af ar az bg bn br bs ca cs cy da de el en_GB eo es et eu fa fi fr fy ga gl he hi hr hu is it ja kk km ko lt lv mk mn ms nb nds nl nn pa pl pt pt_BR ro ru rw se sk sl sr sr@Latn ss sv ta tg tr uk uz vi zh_CN zh_TW es_AR es_ES fy_NL ga_IE gu gu_IN nb_NO nn_NO pt_PT sv_SE zh"
MAKEOPTS="-j16 -s"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY=""
SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage"
USE="X a52 aac accessibility acl acpi aiglx aim alsa amd64 artswrappersuid audiofile avahi bash-completion berkdb bidi bluetooth bzip2 cairo cdda cddb cdr cjk cli consolekit cpudetection cracklib crypt cups cxx dbus dga dri dts dv dvb dvd dvdr dvdread dvi emboss encode exif fam fame fat ffmpeg firefox flac foomatic-db fortran freetype gcj gdbm gif gimpprint gmp gnutls gphoto2 gpm gsm gtk hfs iconv icq ieee1394 imap inotify ipod ipv6 irc irda jabber jack jfs joystick jpeg kdeenablefinal kdehiddenvisibility kerberos lame lcd lcms ldap libnotify live lm_sensors lzo mad mail matroska mjpeg mmx mng modules mozdevelop mp3 mp3rtp mp4 mpeg msn mudflap multilib musepack musicbrainz ncurses network nls nptl nsplugin ntfs ogg openal openexr opengl openmp pam pango pcmcia pcre pda pdf perl png policykit ppds pppd pulseaudio python qt3support qt4 rar rdesktop readline reiserfs rss scanner sdl session slp speex spell sse sse2 ssl startup-notification stream svg sysfs tcpd theora tiff truetype udev udisks unicode upower usb v4l v4l2 visualization vorbis wifi wmf wxwidgets x264 xcb xfs xine xinerama xml xpm xprint xulrunner xv xvid xvmc yahoo zeroconf zlib" ALSA_CARDS="emu10k1x darla20 darla24 emu10k1 gina20 gina24 hdsp hdspm ice1712 indigo indigoio layla20 layla24 mia mixart mona pcxhr rme32 rme96 sb16 sbawe sscape usbusx2y vx222 usb-usx2y" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="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" APACHE2_MPMS="prefork" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump" CAMERAS="agfa_cl20 casio_qv dimagev dimera3500 kodak_dc120 kodak_dc210 kodak_dc240 kodak_dc3200 kodak_ez200 konica_qm150 panasonic_coolshot panasonic_dc1000 panasonic_dc1580 panasonic_l859 polaroid_pdc320 polaroid_pdc640 polaroid_pdc700 ricoh_g3 sipix_blink sipix_blink2 sipix_web2 sony_dscf1 sony_dscf55 toshiba_pdrm11 adc65 aox barbie canon clicksmart310 digigr8 digita directory enigma13 fuji gsmart300 hp215 iclick jamcam jd11 konica largan lg_gsm mars mustek pccam300 pccam600 ptp2 ricoh samsung sierra smal sonix soundvision spca50x sq905 stv0674 stv0680 sx330z template" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" 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 ubx" INPUT_DEVICES="evdev void" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en en_US af ar az bg bn br bs ca cs cy da de el en_GB eo es et eu fa fi fr fy ga gl he hi hr hu is it ja kk km ko lt lv mk mn ms nb nds nl nn pa pl pt pt_BR ro ru rw se sk sl sr sr@Latn ss sv ta tg tr uk uz vi zh_CN zh_TW es_AR es_ES fy_NL ga_IE gu gu_IN nb_NO nn_NO pt_PT sv_SE zh" LIRC_DEVICES="audio audio_alsa serial pctv" PHP_TARGETS="php5-3" PYTHON_TARGETS="python2_7" QEMU_SOFTMMU_TARGETS="x86_64 arm cris i386 m68k microblaze mips mips64 mips64el mipsel ppc ppc64 ppcemb sh4 sh4eb sparc sparc64" QEMU_USER_TARGETS="alpha arm armeb cris i386 m68k microblaze mips mipsel ppc ppc64 ppc64abi32 sh4 sh4eb sparc sparc32plus sparc64 x86_64" RUBY_TARGETS="ruby18" USERLAND="GNU" VIDEO_CARDS="fbdev vesa radeonhd" 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"
USE_PYTHON="2.7"
Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
=================================================================
Package Settings
=================================================================
dev-db/mysql-5.5.22-r1 was built with the following:
USE="community embedded extraengine (multilib) perl ssl -berkdb -cluster -debug -latin1 -max-idx-128 -minimal -profiling (-selinux) -static -systemtap -test"
CFLAGS="-O2 -march=x86-64 -pipe -fno-strict-aliasing"
CXXFLAGS="-O2 -march=x86-64 -pipe -fno-exceptions -fno-strict-aliasing -felide-constructors -fno-rtti -fno-implicit-templates -fno-strict-aliasing"
Does anyone know the solution?