# emerge -uNpv fftw --deep These are the packages that would be merged, in order: Calculating dependencies... done! [ebuild U ] sci-libs/fftw-3.1.2-r1 [3.1.2] USE="fortran openmp%* sse sse2 threads%* (-altivec) -debug -doc% (-test%)" 0 kB [ebuild N ] virtual/mpi-1.0 0 kB [ebuild U ] sci-libs/fftw-2.1.5-r5 [2.1.5-r4] USE="fortran mpi openmp%* threads%* -debug -doc -float" 0 kB # emerge -s mpich Searching... [ Results for search key : mpich ] [ Applications found : 2 ] * sys-cluster/mpich Latest version available: 1.2.7_p1 Latest version installed: [ Not Installed ] Size of files: 15,604 kB Homepage: http://www-unix.mcs.anl.gov/mpi/mpich1 Description: MPICH - A portable MPI implementation License: as-is * sys-cluster/mpich2 Latest version available: 1.0.6 Latest version installed: 1.0.6 Size of files: 15,075 kB Homepage: http://www-unix.mcs.anl.gov/mpi/mpich2 Description: MPICH2 - A portable MPI implementation License: as-is Either mpich2 should have provided virtual/mpi or fftw should be happy with mpich2 installed. What is the problem with my setup? # emerge --info WARNING: repository at /usr/local/portage is missing a repo_name entry Portage 2.2_rc1 (default-linux/x86/2007.0/desktop, gcc-4.3.1, glibc-2.8_p20080602-r0, 2.6.24.7 i686) ================================================================= System uname: Linux-2.6.24.7-i686-Mobile_Intel-R-_Pentium-R-_4_-_M_CPU_1.80GHz-with-glibc2.0 Timestamp of tree: Tue, 08 Jul 2008 10:45:01 +0000 distcc 2.18.3 i686-pc-linux-gnu (protocols 1 and 2) (default port 3632) [disabled] app-shells/bash: 3.2_p39 dev-java/java-config: 1.3.7, 2.1.6-r1 dev-lang/python: 2.5.2-r5 dev-python/pycrypto: 2.0.1-r6 sys-apps/baselayout: 2.0.0 sys-apps/openrc: 0.2.5 sys-apps/sandbox: 1.2.18.1-r3 sys-devel/autoconf: 2.13, 2.62-r1 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10.1-r1 sys-devel/binutils: 2.18-r3 sys-devel/gcc-config: 1.4.0-r4 sys-devel/libtool: 2.2.4 virtual/os-headers: 2.6.25-r4 ACCEPT_KEYWORDS="x86 ~x86" CBUILD="i686-pc-linux-gnu" CFLAGS="-O2 -march=pentium4 -mmmx -msse -msse2 -fomit-frame-pointer -pipe" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /var/bind /var/qmail/alias /var/qmail/control /var/spool/torque /var/vpopmail/etc" 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/terminfo /etc/texmf/web2c /etc/udev/rules.d" CXXFLAGS="-O2 -march=pentium4 -mmmx -msse -msse2 -fomit-frame-pointer -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="distlocks parallel-fetch preserve-libs sandbox sfperms strict unmerge-orphans userfetch" GENTOO_MIRRORS="http://gentoo.mirror.web4u.cz" LDFLAGS="" LINGUAS="en cs cz" PKGDIR="/usr/portage/packages" 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" SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage" USE="7zip R X Xaw3d a52 aac aalib ace acl acpi alsa amr amrnb amrwb apache2 audacious audiofile bash-completion bcmath berkdb blas boost bzip2 cairo cblas cddb cdparanoia cdr clamav cli colordiff compress cpio cracklib crypt cscope css ctype cups curl curlwrappers cxx dbus dga dia directfb djbfft dri dts dv dvb dvd dvdr dvdread eds emacs emboss emf enblend encode enscript exif expat fam fame fat fbcon ffmpeg fftw firefox flac flash foomaticdb fortran fpx ftp gcj gd gdbm ggi gif gimp gimpprint glibc-compat20 glibc-omitfp glitz glut gmp gnuplot gnutls gpgme gphoto2 gpm graphviz gs gsl gstreamer gtk gtkhtml hal hdf hdf5 i8x0 icc iconv icu id3 ieee1394 ifc imagemagick imlib inifile innodb isdnlog ithreads jack java javascript jbig jikes jpeg jpeg2k kdtree kerberos lame lapack lcms leim libcaca libedit libwww live lzo lzw mad maildir matroska mhash midi mikmod mime ming mjpeg mmap mmx mng mod_python modperl modplug motif mozilla moznoirc mp2 mp3 mp4 mpeg mpi mpi_njtree mpich2 mplayer mudflap mule musepack mxdatetime mysql mysqli ncurses netcdf netpbm network nls nntp nptl nptlonly nsplugin ntfs numeric ogg opengl openmp pam pango pcmcia pcntl pcre pdf perl plotutils plugin png pnm postproc postscript ppds pppd procmail pymol python qt3 qt3support qt4 quicktime rar raw readline real recode reflection reiserfs rpm rtc samba sasl scanner scp seamonkey server session sftp sift slp smime sndfile soap sockets spell spl sqlite srt sse sse2 ssl subtitles subversion svg svgz sysfs sysvipc t1lib tcl tcpd tetex theora threads tidy tiff tk transcode truetype unicode urandom usb userlocales uuencode v4l v4l2 vcd vim-syntax vim-with-x vorbis wifi win32codecs wmf wxwindows x264 x86 xanim xcf xfs xft xinetd xml xorg xpm xprint xsl xslt xv xvid xvmc yv12 zip zlib" ALSA_CARDS="intel-8x0m" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter 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 dbd deflate dir disk_cache env expires ext_filter file_cache filter headers ident imagemap include info log_config mem_cache mime mime_magic rewrite setenvif speling status unique_id userdir usertrack vhost_alias negotiation" ELIBC="glibc" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="en cs cz" USERLAND="GNU" VIDEO_CARDS="radeon" Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, MAKEOPTS, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
There is an mpi use flag, so it isn't forced on you.
So why did not mpich2 provide it?
And why isn't it respected by fftw-3.1.2-r1?
> So why did not mpich2 provide it? Well, it does. All you install is a virtual package, just some package manager information. > And why isn't it respected by fftw-3.1.2-r1? Looking at the ebuilds dependencies, it does not depend on an mpi implementation at all.
