After emerging x11-libs/qwt-4.2.0-r3, I have in /usr/lib64 lrwxrwxrwx 1 root root 15 12. Mär 13:10 /usr/lib64/libqwt.so.4 -> libqwt.so.4.2.0 lrwxrwxrwx 1 root root 15 12. Mär 13:10 /usr/lib64/libqwt.so.4.2 -> libqwt.so.4.2.0 -rwxr-xr-x 1 root root 773144 12. Mär 13:10 /usr/lib64/libqwt.so.4.2.0 but no symlink called libqwt.so. Subsequently linking programs to the library fails (i.e. qtiplot). Symlinking /usr/lib64/libqwt.so -> libqwt.so.4.2.0 manually fixes the problem. This may be related to bug #242650.
grenadine ~ # emerge --info Portage 2.1.6.7 (default/linux/amd64/2008.0, gcc-4.1.2, glibc-2.8_p20080602-r1, 2.6.27-gentoo-r8 x86_64) ================================================================= System uname: Linux-2.6.27-gentoo-r8-x86_64-Intel-R-_Core-TM-2_Duo_CPU_E8400_@_3.00GHz-with-glibc2.2.5 Timestamp of tree: Fri, 13 Mar 2009 09:30:01 +0000 app-shells/bash: 3.2_p39 dev-java/java-config: 2.1.7 dev-lang/python: 2.4.4-r14, 2.5.2-r7 dev-python/pycrypto: 2.0.1-r8 dev-util/cmake: 2.4.8 sys-apps/baselayout: 1.12.11.1 sys-apps/sandbox: 1.2.18.1-r2 sys-devel/autoconf: 2.13, 2.63 sys-devel/automake: 1.7.9-r1, 1.9.6-r2, 1.10.2 sys-devel/binutils: 2.18-r3 sys-devel/gcc-config: 1.4.0-r4 sys-devel/libtool: 1.5.26 virtual/os-headers: 2.6.27-r2 ACCEPT_KEYWORDS="amd64" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=nocona -O2 -pipe" CHOST="x86_64-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" 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/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c /etc/udev/rules.d" CXXFLAGS="-march=nocona -O2 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="distlocks fixpackages parallel-fetch protect-owned sandbox sfperms strict unmerge-orphans userfetch userpriv usersandbox" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/linux/distributions/gentoo" LANG="de_DE.UTF-8" LDFLAGS="-Wl,-O1" LINGUAS="de en nl" 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="/usr/portage/local/layman/n4g /usr/portage/local/akh" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X a52 aac acl acpi ads alsa amd64 animgif apache2 arts audiofile bash-completion berkdb bzip2 cairo cdaudio cdda cddax cddb cdparanoia cdr cisco cli corefonts cracklib crypt css cups cupsddk curl cxx dbus dri dvd dvdr encode enscript exif ffmpeg fortran gd gdbm gif glitz gnuplot gpm gps gtk hal iconv id3 id3tag imagemagick imap ipv6 isdnlog jpeg jpeg2k kde kontact lame latex ldap lm_sensors math mbox midi mime mmx mng mp3 mpeg mplayer mudflap multilib mysql ncurses nls nptl nptlonly nsplugin ogg opengl openmp pam pcre pdf perl php plotutils png pppd python qt3 quicktime rdesktop readline reflection samba session smp spl sqlite sse sse2 ssl ssse3 subversion svg sysfs syslog tcpd theora tiff truetype unicode usb vnc vorbis wmf x264 xcb xine xml xmp xorg xulrunner xv xvid zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci 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" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="de en nl" USERLAND="GNU" VIDEO_CARDS="fglrx radeon vesa" Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, FFLAGS, INSTALL_MASK, LC_ALL, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
=qwt-4* dropped from tree, partly because of this mess
