The mesa configure script bails out if we don't have it. $ emerge --info Portage 2.1.10.44 (default/linux/x86/10.0, gcc-4.4.4, glibc-2.14.1-r2, 3.6.0-rc4 i686) ================================================================= System uname: Linux-3.6.0-rc4-i686-Intel-R-_Pentium-R-_4_CPU_2.66GHz-with-gentoo-2.1 Timestamp of tree: Sat, 25 Aug 2012 12:45:01 +0000 ccache version 3.1.7 [enabled] app-shells/bash: 4.2_p20 dev-java/java-config: 1.3.7-r1, 2.1.11-r3 dev-lang/python: 2.3.6-r2::<unknown repository>, 2.4.6, 2.5.4-r4, 2.6.7-r2, 2.7.2-r3, 3.1.3-r1, 3.2.2 dev-util/ccache: 3.1.7 dev-util/cmake: 2.8.6-r4 dev-util/pkgconfig: 0.26 sys-apps/baselayout: 2.1 sys-apps/openrc: 0.9.8.4 sys-apps/sandbox: 2.5 sys-devel/autoconf: 2.13::<unknown repository>, 2.68 sys-devel/automake: 1.4_p6::<unknown repository>, 1.5::<unknown repository>, 1.6.3::<unknown repository>, 1.7.9-r1::<unknown repository>, 1.8.5-r3::<unknown repository>, 1.9.6-r3, 1.10.3, 1.11.3 sys-devel/binutils: 2.22-r1 sys-devel/gcc: 3.2.3-r1::<unknown repository>, 3.3.6-r1::<unknown repository>, 3.4.6-r2::<unknown repository>, 4.1.2::<unknown repository>, 4.2.4, 4.3.3-r2, 4.4.4-r2, 4.5.3-r2 sys-devel/gcc-config: 1.5-r2 sys-devel/libtool: 1.4.3-r1::<unknown repository>, 2.4.2 sys-devel/make: 3.82-r3 sys-kernel/linux-headers: 3.2 (virtual/os-headers) sys-libs/glibc: 2.14.1-r2 Repositories: gentoo crossdev-portage zugaina interactive-fiction martin-s-local-portage-repo ACCEPT_KEYWORDS="x86 ~x86" ACCEPT_LICENSE="* -@EULA" CBUILD="i686-pc-linux-gnu" CFLAGS="-O2 -march=pentium3" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt /usr/share/openvpn/easy-rsa" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /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="-O2 -march=pentium3" DISTDIR="/usr/portage/distfiles" FCFLAGS="-O2 -march=i686 -pipe" FEATURES="assume-digests binpkg-logs ccache distlocks ebuild-locks fixlafiles metadata-transfer news parallel-fetch protect-owned sandbox sfperms splitdebug strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox" FFLAGS="-O2 -march=i686 -pipe" GENTOO_MIRRORS="rsync://212.219.56.139/www.ibiblio.org/gentoo/ rsync://212.219.56.133/www.ibiblio.org/gentoo/ rsync://212.219.56.135/www.ibiblio.org/gentoo/" LANG="en_GB.utf8" LC_ALL="en_GB.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage-crossdev /var/lib/layman/zugaina /var/lib/layman/interactive-fiction /usr/local/portage" SYNC="rsync://rsync.fr.gentoo.org/gentoo-portage" USE="X aalib acl acpi alsa apache2 avi bash-completion berkdb bzip2 caca cli cracklib crypt cxx dga directfb dri emacs encode fbcon fortran gatos gdbm gpm gtk guile iconv ipv6 jpeg mmx modules mozilla mudflap ncurses nls nptl nsplugin oggvorbis opengl openmp oss pam pcre perl png pppd python qt3support readline session spell sse ssl svg svga tcpd theora unicode v4l v4l2 x86 xv xvid zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1 emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci cs4236" 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 auth_digest authn_anon authn_dbd authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock dbd deflate dir disk_cache env expires ext_filter file_cache filter headers ident imagemap include info log_config logio mem_cache mime mime_magic negotiation proxy proxy_ajp proxy_balancer proxy_connect proxy_http rewrite setenvif so speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump" CAMERAS="ptp2" 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="keyboard mouse" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" PHP_TARGETS="php5-3" PYTHON_TARGETS="python3_2 python2_7" RUBY_TARGETS="ruby18 ruby19" USERLAND="GNU" VIDEO_CARDS="vesa intel nvidia" 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: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LINGUAS, MAKEOPTS, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
This is already fixed in mesa-9_pre20120831 The mesa-8.1 ebuilds will be dropped soon because they are affected by bug 432400.
