The dev-php/PEAR* ebuilds lack the ~amd64 keyword, despite the fact that there should be nothing keeping them from working on any particular platform that supports PHP. I have personally built and installed: PEAR-PHPUnit PEAR-PhpDocumentor smarty smarty-docs and can test others if necessary. In addition, dev-php/phpdbg seems to work fine as well. Reproducible: Always Steps to Reproduce: miriel dev-php # emerge info Portage 2.0.51-r8 (default-linux/amd64/2004.3, gcc-3.4.3, glibc-2.3.4.20041102-r0, 2.6.9-gentoo-r4 x86_64) ================================================================= System uname: 2.6.9-gentoo-r4 x86_64 AMD Athlon(tm) 64 Processor 3000+ Gentoo Base System version 1.6.7 Python: dev-lang/python-2.3.4 [2.3.4 (#1, Dec 7 2004, 17:44:39)] dev-lang/python: 2.3.4 sys-devel/autoconf: 2.59-r6, 2.13 sys-devel/automake: 1.9.3, 1.8.5-r2, 1.6.3, 1.7.9, 1.5, 1.4_p6 sys-devel/binutils: 2.15.92.0.2-r2 sys-devel/libtool: 1.5.10-r1 virtual/os-headers: 2.6.8.1-r1 ACCEPT_KEYWORDS="amd64 ~amd64" AUTOCLEAN="yes" CFLAGS="-march=athlon64 -O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config /usr/kde/3.3/env /usr/kde/3.3/share/config /usr/kde/3.3/shutdown /usr/kde/3/share/config /usr/lib/mozilla/defaults/pref /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-march=x86-64 -O2 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs autoconfig ccache distlocks" GENTOO_MIRRORS="http://mirror.datapipe.net/gentoo http://gentoo.chem.wisc.edu/gentoo/ http://open-systems.ufl.edu/mirrors/gentoo http://gentoo.mirrors.pair.com/ http://gentoo.osuosl.org/" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.us.gentoo.org/gentoo-portage" USE="amd64 X aac aalib acpi acpi4linux aim alsa apache2 apm ared aredmem arts artworkextra avi ba-completion beepmp berkdb bitmap-fonts bmp bonobo bootspla bzlib calendar cdb cddb cdparanoia cdr cdrom codecs crypt css cups curl curlwrappers dba dbm dbx dga directfb divx4linux dmx dvd dvdread eds emacs esd ethereal evo faac faad fam ffmpeg flac flatfile fortran ftp gcj gd gdbm geoip gif gimpprint gnome gnomedb gphoto2 gpm gstreamer gtk gtk2 gtkhtml guile hal howl imagemagick imap imlib imlib2 innodb jabber jack java javascript jce jikes jp2 jpeg junit jython kde ldap libgda libwww live lzw lzw-tiff mad maildir matroska mcal mikmod mime mimencode ming mng monkey mono mozcalendar mozdevelop mozilla mozp3p mozsvg mp3 mpeg mpeg4 mplayer multilib mysql mysqli native ncurses nls nomac nptl nptlonly ntlm odbc offensive oggvorbis opengl opens oss pam pcre pda pdflib pear-db perl php png posix python qdbm qt quicktime radeon readline samba sasl sdl servlet-2.3 servlet-2.4 session simplexml slp smime sndfile soap sockets sox speex spell spl sqlite ssl svg tcltk tcpd theora threads tidy tiff truetype truetype-fonts type1 type1-fonts unicode usb userlocales vhosts vim vim-with-x virus-scan vnc wxwin wxwindows xemacs xface xml xml2 xmlrpc xmms xosd xpm xprint xrandr xscreensaver xsl xv xvid xvmc yv12 zeo zlib"
all done, thanks