Bugzilla Bug 223817

Trying to use PerlMagick modules gives me:

Can't load
'/usr/lib64/perl5/site_perl/5.8.8/x86_64-linux/auto/Image/Magick/Magick.so' for
module Image::Magick: libgomp.so.1: shared object cannot be dlopen()ed at
/usr/lib64/perl5/5.8.8/x86_64-linux/DynaLoader.pm line 230.


This appears to be the same bug as 193737, which was closed several months ago.

I'm not positive, but I think the upgrade to GCC 4.2.4 was the instigating
factor.

Reproducible: Always

Steps to Reproduce:
1. Use PerlMagick library.
2. Boom. 


Actual Results:  
Error message as above.

Expected Results:  
PerlMagick should link. 

Portage 2.1.5.2 (default-linux/amd64/2007.0, gcc-4.2.4, glibc-2.7-r2,
2.6.25-gentoo-r4 x86_64)
=================================================================
System uname: 2.6.25-gentoo-r4 x86_64 AMD Athlon(tm) 64 X2 Dual Core Processor
4400+
Timestamp of tree: Tue, 27 May 2008 05:45:01 +0000
ccache version 2.4 [enabled]
app-shells/bash:     3.2_p39
dev-java/java-config: 1.3.7, 2.1.6
dev-lang/python:     2.5.2-r4
dev-util/ccache:     2.4-r7
sys-apps/baselayout: 2.0.0
sys-apps/openrc:     0.2.4-r1
sys-apps/sandbox:    1.2.18.1-r2
sys-devel/autoconf:  2.13, 2.62
sys-devel/automake:  1.5, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10.1-r1
sys-devel/binutils:  2.18-r1
sys-devel/gcc-config: 1.4.0-r4
sys-devel/libtool:   1.5.26
virtual/os-headers:  2.6.25-r3
ACCEPT_KEYWORDS="amd64 ~amd64"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=athlon64 -O3 -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/env.d /etc/env.d/java/ /etc/fonts/fonts.conf
/etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/terminfo
/etc/udev/rules.d"
CXXFLAGS="-march=athlon64 -O3 -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="ccache distlocks parallel-fetch sandbox sfperms strict
unmerge-orphans userfetch"
GENTOO_MIRRORS="http://gentoo.osuosl.org/ http://gentoo.chem.wisc.edu/gentoo/
http://gentoo.mirrors.pair.com/ "
LC_ALL="POSIX"
LDFLAGS=""
LINGUAS="en en_US"
MAKEOPTS="-j3"
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.namerica.gentoo.org/gentoo-portage"
USE="amd64 berkdb cli cracklib crypt cups dri fortran gdbm gpm iconv isdnlog
kdeenablefinal kdehiddenvisibility midi mmx mudflap ncurses nptl nptlonly
openmp pam pcre perl pppd python readline reflection session spl sse sse2 ssl
tcpd unicode xorg 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 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"
CAMERAS="canon" ELIBC="glibc" INPUT_DEVICES="keyboard mouse" KERNEL="linux"
LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses
text" LINGUAS="en en_US" USERLAND="GNU" VIDEO_CARDS="nv nvidia"
Unset:  CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG,
PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS

Which version of media-gfx/imagemagick do you use?

I experience the same error with imagemagick wrapper for ruby (Rmagick) on two
computers - i686 and x86_64.

libgomp.so.1: shared object cannot be dlopen()ed -
/usr/lib64/ruby/site_ruby/1.8/x86_64-linux/RMagick2.so

I belivele it caused by libgomp.so from news GCC (updated just yesterday).

Found a thread that seems relevant to the problem:
http://www.archivum.info/gnu.gcc.help/2006-07/msg00076.html

(In reply to comment #1)
> Which version of media-gfx/imagemagick do you use?
> 

<~> $ convert --version
Version: ImageMagick 6.4.1 05/27/08 Q16 OpenMP http://www.imagemagick.org
Copyright: Copyright (C) 1999-2008 ImageMagick Studio LLC

(In reply to comment #3)
> (In reply to comment #1)
> > Which version of media-gfx/imagemagick do you use?
> > 
> 
> <~> $ convert --version
> Version: ImageMagick 6.4.1 05/27/08 Q16 OpenMP http://www.imagemagick.org
> Copyright: Copyright (C) 1999-2008 ImageMagick Studio LLC
> 

and more specifically, emerged as the following:

[ebuild   R   ] media-gfx/imagemagick-6.4.1.3  USE="X bzip2 graphviz jpeg lcms
perl png svg tiff truetype xml zlib -djvu -doc -fontconfig -fpx -gs -hdri -jbig
-jpeg2k -nocxx -openexr -q32 -q8 -wmf" 0 kB

(In reply to comment #4)
> (In reply to comment #3)
> > (In reply to comment #1)
> > > Which version of media-gfx/imagemagick do you use?
> > > 
> > 
> > <~> $ convert --version
> > Version: ImageMagick 6.4.1 05/27/08 Q16 OpenMP http://www.imagemagick.org
> > Copyright: Copyright (C) 1999-2008 ImageMagick Studio LLC
> > 
> 
> and more specifically, emerged as the following:
> 
> [ebuild   R   ] media-gfx/imagemagick-6.4.1.3  USE="X bzip2 graphviz jpeg lcms
> perl png svg tiff truetype xml zlib -djvu -doc -fontconfig -fpx -gs -hdri -jbig
> -jpeg2k -nocxx -openexr -q32 -q8 -wmf" 0 kB
> 

Falling back to this version:

[ebuild   R   ] media-gfx/imagemagick-6.4.0.6  USE="X bzip2 graphviz jpeg lcms
perl png svg tiff truetype xml zlib -djvu -doc -fontconfig -fpx -gs -hdri -jbig
-jpeg2k -nocxx -openexr -q32 -q8 -wmf" 0 kB

Fixes the problem for me.

from what i see the problem is that libgomp.so in gcc 4.2.4 (didn't check
earlier versions) is marked NOOPEN so it can't be dlopen'd, directly or
indirectly. perl/ruby/apache+php/etc all dlopen their modules and since
imagemagick libs link against libgomp, such attempts fail. so there're two
questions to answer:

- is imagemagick supposed to link against libgomp? if yes, then there's trouble
because it means that imagemagick cannot be used as a dlopen'd module any
longer. if no then something in the imagemagick build system (or maybe default
gcc specs?) pulls it in for no reason.

- is libgomp marked NOOPEN for any particular reason? was it like that before?
in any case, if the answer is yes (and i guess it is), then it means that
nothing linking against it can be dlopen'd in the future, so more packages
besides imagemagick will break.

(In reply to comment #6)
> so there're two questions to answer:

Thanks for figuring out NOOPEN as the culprit! I guess the answer to both
questions is "No, but there is a performance penalty if you don't".

For imagemagick, the solution would be to --disable-openmp. I guess introducing
the openmp USE flag and $(enable_with openmp) would be more appropriate. Maybe
using perl or python should override the openmp setting, though. As php is
probably affected as well, and is in a separate package, the current IUSE flags
are not enough to decide whether imagemagick has to be dynamically linkable.

For the NOOPEN flag in libgomp I found a most interesting bug report here:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28482
There is a fix included in gcc-4.3*, but 4.2.4 doesn't include that fix. Maybe
4.2.5 will. So here a workaround for Gentoo users would be to emerge and switch
to the latest gcc, with all the system rebuild that entails.

Created an attachment (id=157333) [edit]
openmp USE flag for imagemagick

This patch allows users to add "media-gfx/imagemagick -openmp" to their
/etc/portage/package.use in order to avoid linking against libgomp.
A matching entry in profiles/use.local.desc would probably be required as well,
e.g. copy&paste from gcc. profiles/default/linux/make.default currently
defaults openmp, so the patch wouldn't affect the default behaviour.

USE-flag added in media-gfx/imagemagick-6.4.2.0. Thanks for the patch.