Bugzilla Bug 230982

[ebuild     U ] sci-libs/fftw-2.1.5-r5 [2.1.5-r4] USE="fortran openmp%*
threads%* -debug -doc -float (-mpi)" 0 kB


checking size of int... 4
checking for long long... yes
checking size of long long... 8
checking whether cc accepts "-fkeep-programmers-inline"... no
checking whether cc accepts "-vomit-frame-pointer"... no
checking how to enable OpenMP... unknown
configure: error: don't know how to enable OpenMP

!!! Please attach the following file when seeking support:
!!!
/mnt/alt/portage-tmp/portage/sci-libs/fftw-2.1.5-r5/work/fftw-2.1.5-single/config.log


Sun Jul  6 22:24:04 CEST 2008
Portage 2.2_rc1 (default-linux/hppa/2007.0, gcc-4.1.2, glibc-2.7-r2,
2.6.25-gentoo-r6-JeR parisc)
=================================================================
System uname: Linux-2.6.25-gentoo-r6-JeR-parisc-PA8700_-PCX-W2-with-glibc2.2
Timestamp of tree: Sun, 06 Jul 2008 16:22:01 +0000
distcc 2.18.3 hppa2.0-unknown-linux-gnu (protocols 1 and 2) (default port 3632)
[disabled]
ccache version 2.4 [disabled]
app-shells/bash:     3.2_p33
dev-lang/python:     2.5.2-r5
dev-python/pycrypto: 2.0.1-r6
dev-util/ccache:     2.4-r7
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, 2.61-r2
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
sys-devel/binutils:  2.18-r1
sys-devel/gcc-config: 1.4.0-r4
sys-devel/libtool:   1.5.26
virtual/os-headers:  2.6.23-r3
ACCEPT_KEYWORDS="hppa"
CBUILD="hppa2.0-unknown-linux-gnu"
CFLAGS="-O2 -fno-omit-frame-pointer -pipe -mschedule=8000 -march=2.0 -g -ggdb
-Wall"
CHOST="hppa2.0-unknown-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config
/usr/kde/3.5/shutdown /usr/share/X11/xkb /usr/share/config /var/bind
/var/spool/torque /var/www/localhost/htdocs/wordpress/wp-config.php"
CONFIG_PROTECT_MASK="/etc/env.d /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/terminfo /etc/texmf/web2c /etc/udev/rules.d"
CXXFLAGS="-O2 -fno-omit-frame-pointer -pipe -mschedule=8000 -march=2.0 -g -ggdb
-Wall"
DISTDIR="/keeps/gentoo/distfiles"
FEATURES="autoaddcvs buildpkg cvs distlocks fixpackages notitles parallel-fetch
preserve-libs sandbox sfperms splitdebug strict unmerge-orphans userfetch"
GENTOO_MIRRORS="http://ftp.snt.utwente.nl/pub/os/linux/gentoo
http://mirror.muntinternet.net/pub/gentoo/ http://gentoo.tiscali.nl/"
LC_ALL="en_US.UTF-8"
LDFLAGS=""
LINGUAS="en nl he"
MAKEOPTS="-j4"
PKGDIR="/keeps/gentoo/packages/elmer"
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="/mnt/alt/portage-tmp"
PORTDIR="/keeps/gentoo/portage"
PORTDIR_OVERLAY="/keeps/gentoo/local"
SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage"
USE="7zip X Xaw3d a52 aac aalib accessibility ads agg alsa amr amrnb amrwb ao
aoss apache2 ares arts asf async asyncns audiofile audit automount avfs
bash-completion berkdb bidi bittorrent bl bluetooth bzip2 c++ cairo caps
catalogs cblas cdb cddb cdparanoia cdr chardet cjk cli cpudetection cracklib
crypt cups curl custom-cflags dbtool dbus device-mapper dga dia directfb djbfft
domainkeys dts dv dvd dvdr dvdread dxr3 edl elf emacs enca encode esd examples
exif expat fam fame fastbuild fastcgi fbcon ffmpeg filter flac fontconfig
foomaticdb fortran ftp gadu galago gd gdbm geoip ggi gif gimp gimpprint glep
glib glut gmp gnome gnutls gphoto2 gpm gs gsl gtk gtk2 gtkhtml hal hesiod hppa
ical icecast iconv idea idn imagemagick imlib immqt-bc inquisitio ipv6 isdnlog
ithreads jack javascript jingle jpeg jpeg2k kde kerberos lapack lcms ldap leim
libcaca libnotify libsamplerate libwww live logrotate logwatch lua lzo mad
matroska memcache metis mhash midi mikmod mmap mng modplug motif mozbranding
mp3 mplayer mssql mudflap musepack mysql nas ncurses netpbm network-cron
nfconntrack nfs nls nntp nptl nptlonly nsplugin offensive ogg openexr opengl
openmp oss ots overlays pam pango pbs pcre pdf pdo-external perl php pic
plotutils plugins png portage portaudio postgres povray ppds pppd pulseaudio
python pyzord qdbm qt3 qt3support quotas raw readline recode reflection rpc
rrdtool rtc ruby samba sasl scanner scim sdl seamonkey server session sid slang
slp sms sndfile snmp soundex speex spell spl sqlite ssl startup-notification
subversion suhosin supernodal svg swat sysfs syslog talkfilters tcl tcpd test
tga theora threads thunar-vfs tidy tiff timidity tk tools truetype twolame udev
unicode unzip urandom usb userlocales utempter utf v4l v4l2 vanim vcd vidix
vim-syntax vorbis wavpack webdav webinstall winbind wlan wma wmf xanim
xchattext xcomposite xface xml xml2 xmpi xorg xpm xrandr xscreensaver xsettings
xulrunner xv xvid xvmc zip zip-external zlib" ALSA_CARDS="ad1889 usb-audio"
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 dav dav_fs
dav_lock dbd deflate dir disk_cache env expires ext_filter file_cache filter
headers ident imagemap include info log_config logio mem_cache mime mime_magic
negotiation proxy proxy_ajp proxy_balancer proxy_connect proxy_http rewrite
setenvif so speling status unique_id userdir usertrack vhost_alias"
ELIBC="glibc" INPUT_DEVICES="keyboard mouse evdev joystick" KERNEL="linux"
LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses
text" LINGUAS="en nl he" USERLAND="GNU" VIDEO_CARDS="stifb fbdev matrox"
Unset:  CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG,
PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS

Created an attachment (id=159727) [edit]
config.log

Created an attachment (id=159729) [edit]
sci-libs:fftw-2.1.5-r5:20080705-154346.log.gz

Hi,

openmp is not supported by gcc < 4.2. I'm wondering what's the correct solution
here. Should we forced the autotools to use pthread instead of openmp if the
compiler does not support it? The problem is that we can't detect in the ebuild
if the compiler does not support openmp, and it can be common to build fftw
with other compilers than gcc.

(In reply to comment #3)
> Hi,
> 
> openmp is not supported by gcc < 4.2. I'm wondering what's the correct solution
> here. Should we forced the autotools to use pthread instead of openmp if the
> compiler does not support it? The problem is that we can't detect in the ebuild
> if the compiler does not support openmp, and it can be common to build fftw
> with other compilers than gcc.
> 

Since we offer the openmp flag we could just check for >=gcc-4.2 in 
pkg_setup and either abort or print a big warning that OpenMP has
been disabled.

Best,
Markus

I added a few checks when fftw is built with gcc, and fixed the autotools not
to abort but to revert to posix threads if openmp is not supported by the
compiler.
Should close this bug.
If the solution does not work with icc or other gcc versions, please re-open.
Thanks.