Bugzilla Bug 291972

dev-util/ddd does not depend on dev-libs/elfutils, but links to libelf anyway
when it is available. This confuses emerge --depclean.

Reproducible: Always

Steps to Reproduce:
1. emerge -1 dev-libs/elfutils
2. emerge dev-util/ddd
3. emerge -p --depclean

Actual Results:  
emerge --depclean gives this output:
 * In order to avoid breakage of link level dependencies, one or more
 * packages will not be removed. This can be solved by rebuilding the
 * packages that pulled them in.
 *                                             
 *   dev-libs/elfutils-0.131-r2 pulled in by:
 *     dev-util/ddd-3.3.12-r1 needs libelf.so.1

But rebuilding ddd does not help. Instead, removing elfutils, then rebuilding
ddd helps.

Expected Results:  
depclean should inform the user to remove elfutils, and then rebuild ddd (or
use revdep-rebuild).
Or the ddd source should be changed so that it does not use libelf, unless told
so explicitely. I filed an upstream bug report, see the URL above. But as this
seems to happen with some other packages as well, a more clear depclean
explanation might help the users to understand what is going on, instead of
making them build packages like ddd again and again.

I get a similar message for media-libs/libcddb-1.3.2, media-
sound/esound-0.2.41, sys-libs/db-4.5.20_p2-r1 and sys-libs/db-4.6.21_p4. And
about esd:
 *   media-sound/esound-0.2.41 pulled in by:
 *     app-office/gnucash-2.2.9-r1 needs libesd.so.0
 *     gnome-extra/gnome-media-2.26.0-r1 needs libesd.so.0
 *     gnome-extra/nautilus-cd-burner-2.24.0 needs libesd.so.0
 *     gnome-extra/yelp-2.26.0 needs libesd.so.0              
 *     media-libs/smpeg-0.4.4-r9 needs libesd.so.0            
 *     media-sound/amarok-1.4.10_p20090130-r3 needs libesd.so.0
 *     media-sound/rhythmbox-0.11.6-r1 needs libesd.so.0       
 *     media-sound/synaesthesia-2.4 needs libesd.so.0          
 *     media-video/transcode-1.0.7 needs libesd.so.0
But I did not investigate this further yet.

Portage 2.2_rc48 (default/linux/x86/10.0/desktop, gcc-4.3.4,
glibc-2.9_p20081201-r2, 2.6.31-tuxonice i686)                                   
=================================================================               
System uname:
Linux-2.6.31-tuxonice-i686-AMD_Athlon-tm-_Dual_Core_Processor_4850e-with-gentoo-1.12.11.1 
Timestamp of tree: Mon, 02 Nov 2009 07:45:01 +0000
distcc 3.1 i686-pc-linux-gnu [enabled]
ccache version 2.4 [enabled]
app-shells/bash:     4.0_p28
dev-java/java-config: 2.1.9-r1
dev-lang/python:     2.6.2-r1
dev-util/ccache:     2.4-r7
dev-util/cmake:      2.6.4
sys-apps/baselayout: 1.12.11.1
sys-apps/sandbox:    2.2
sys-devel/autoconf:  2.13, 2.63-r1
sys-devel/automake:  1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10.2
sys-devel/binutils:  2.18-r3
sys-devel/gcc-config: 1.4.1
sys-devel/libtool:   2.2.6a
virtual/os-headers:  2.6.27-r2
ACCEPT_KEYWORDS="x86"
CBUILD="i686-pc-linux-gnu"
CFLAGS="-march=k8-sse3 -mfpmath=sse -O2 -pipe -fomit-frame-pointer"
CHOST="i686-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config
/usr/kde/3.5/shutdown /usr/share/config /var/lib/hsqldb"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/
/etc/fonts/fonts.conf /etc/gconf /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/splash /etc/terminfo /etc/texmf/language.dat.d
/etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c
/etc/udev/rules.d"
CXXFLAGS="-march=k8-sse3 -mfpmath=sse -O2 -pipe -fomit-frame-pointer"
DISTDIR="/usr/portage/distfiles"
EMERGE_DEFAULT_OPTS="--with-bdeps y"
FEATURES="assume-digests buildsyspkg ccache collision-protect distcc distlocks
fixpackages news parallel-fetch preserve-libs protect-owned sandbox sfperms
strict unmerge-logs unmerge-orphans userfetch userpriv usersandbox"
GENTOO_MIRRORS="http://de-mirror.org/distro/gentoo/
ftp://gentoo.imj.fr/pub/gentoo/ http://mirror.leaseweb.com/gentoo/
ftp://mirror.leaseweb.com/gentoo/"
LANG="de_DE.utf8"
LDFLAGS="-Wl,-O1"
LINGUAS="de"
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/tree"
PORTDIR_OVERLAY="/usr/local/portage/layman/kde-testing
/usr/local/portage/layman/vmware /usr/local/portage/layman/sunrise
/usr/local/portage/layman/science /usr/local/portage"
SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage"
USE="3dnow X a52 aac aalib acl acpi aim alsa apm audiofile bash-completion
bcmath berkdb bluetooth branding bzip2 cairo cdparanoia cdr cli consolekit
cracklib crypt ctype cups cvs dbus dga directfb dri dts dvb dvd dvdr eds emacs
emboss encode evo fam fbcon ffmpeg firefox flac foomaticdb fortran ftp gd gdbm
ggi gif gimp ginac gnome gphoto2 gpm gstreamer gtk hal hddtemp htmlhandbook
iconv ieee1394 imagemagick imlib ipv6 jabber jack java javascript jbig jpeg
jpeg2k kde latex ldap libnotify lirc lm_sensors mad maildir matrox mikmod mime
mmx mng modplug modules motif mp3 mp4 mpeg mplayer msn mudflap musepack
musicbrainz nas ncurses nls nptl nptlonly nsplugin ogg openal opengl openmp oss
pam pcre pdf perl php plotutils png ppds pppd python qt3support qt4 quicktime
radius readline recode reflection ruby samba scanner sdl semantic-desktop
session slang slp sndfile sockets sox speex spell spl sse sse2 sse3 ssl
startup-notification subversion svg svga sysfs tcpd theora threads thunar tiff
truetype unicode usb videos vim-syntax visualization vorbis win32codecs wma wmf
wxwindows x264 x86 xattr xcomposite xine xml xorg xosd xpm xscreensaver
xulrunner 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"
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
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" FRITZCAPI_CARDS="fcpci" INPUT_DEVICES="evdev
keyboard mouse" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780
lb216 lcdm001 mtxorb ncurses text" LINGUAS="de" LIRC_DEVICES="serial"
USERLAND="GNU" VIDEO_CARDS="fglrx radeon radeonhd vesa"
Unset:  CPPFLAGS, CTARGET, FFLAGS, INSTALL_MASK, LC_ALL, PORTAGE_COMPRESS,
PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS

Added Gentoo version, and reduced priority.

I wonder if this bug should be filed against ddd, or if this is more a general
portage thing, as it happens with other packages than ddd, too. So I changed
the Component from Development to Unspecified.