Someone was asking on IRC to test to see if clang builds, and while I was running this build test for them I noticed sys-devel/clang bundles llvm. llvm is already a dependency of clang, so it doesn't need to be bundled with clang. Reproducible: Always Steps to Reproduce: 1. emerge '=sys-devel/clang-2.7-r1' 2. Observe how it immediately begins work in /var/tmp/portage/sys-devel/clang-2.7-r1/work/llvm-2.7/ # emerge --info Portage 2.1.8.3 (default/linux/amd64/10.0/desktop/gnome, gcc-4.3.4, glibc-2.11.2-r0, 2.6.33-gentoo-r2 x86_64) ================================================================= System uname: Linux-2.6.33-gentoo-r2-x86_64-Intel-R-_Core-TM-2_Duo_CPU_P8800_@_2.66GHz-with-gentoo-2.0.1 Timestamp of tree: Wed, 21 Jul 2010 15:30:01 +0000 app-shells/bash: 4.0_p37 dev-java/java-config: 2.1.11 dev-lang/python: 2.6.5-r2, 3.1.2-r3 dev-util/cmake: 2.6.4-r3 sys-apps/baselayout: 2.0.1 sys-apps/openrc: 0.6.1-r1 sys-apps/sandbox: 1.6-r2 sys-devel/autoconf: 2.13, 2.65 sys-devel/automake: 1.9.6-r3, 1.10.3, 1.11.1 sys-devel/binutils: 2.20.1-r1 sys-devel/gcc: 4.3.4, 4.4.3-r2 sys-devel/gcc-config: 1.4.1 sys-devel/libtool: 2.2.6b virtual/os-headers: 2.6.30-r1 ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-pipe -march=core2 -msse4.1 -O2" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/X11/xkb" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5/ext-active/ /etc/php/cgi-php5/ext-active/ /etc/php/cli-php5/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="-pipe -march=core2 -msse4.1 -O2" DISTDIR="/usr/portage/distfiles" FEATURES="assume-digests collision-protect distlocks fixpackages news parallel-fetch protect-owned sandbox sfperms strict unmerge-logs unmerge-orphans userfetch" GENTOO_MIRRORS="http://distfiles.gentoo.org" LANG="en_US.UTF-8" LDFLAGS="-Wl,-O1" LINGUAS="en" MAKEOPTS="-j3" 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="/var/lib/layman/sunrise /var/lib/layman/desktop-effects /usr/local/portage /usr/local/portage/layman/sunrise" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X a52 aac acl acpi alsa amd64 bash-completion berkdb bluetooth branding bzip2 cairo cdda cdr cjk cleartype cli consolekit corefonts cracklib crypt cups cxx dbus divx dri dts dvd dvdr eds emboss encode evo exif fam ffmpeg firefox flac fortran gdbm gdu gif gnome gnome-keyring gpm gstreamer gtk hal iconv ipod ipv6 jpeg laptop lcms ldap libnotify lm_sensors mad mikmod mmx mmxext mng modules mp3 mp4 mpeg mtp mudflap multilib nautilus ncurses networkmanager nls nptl nptlonly nsplugin ogg opengl openmp pam pango pcre pdf perl png policykit ppds pppd pulseaudio python qt3support qt4 readline reflection samba sdl session spell spl sse sse2 ssl ssse3 startup-notification svg sysfs syslog tcpd theora tiff truetype type1 unicode usb vorbis wifi x264 xcb xml xorg xulrunner xv xvid zlib" ALSA_CARDS="hda-intel" 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" ELIBC="glibc" INPUT_DEVICES="keyboard mouse evdev synaptics" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="en" RUBY_TARGETS="ruby18" USERLAND="GNU" VIDEO_CARDS="nvidia nv vesa fbdev" 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, FFLAGS, INSTALL_MASK, LC_ALL, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
The installed files are only clang ones, for compilation clang requires a full llvm tree and cannot use a system one. There were talks upstream to add this feature sometime, but nothing for now :/
