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[[!meta copyright="Copyright © 2010, 2011 Free Software Foundation, Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License, Version 1.2 or
any later version published by the Free Software Foundation; with no Invariant
Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
is included in the section entitled [[GNU Free Documentation
License|/fdl]]."]]"""]]
[[!debbug 557771]]
# Bisecting
* Good
* 7:6.4.0.9.dfsg1-1 (2008-04-22) built from
<http://snapshot.debian.net/package/imagemagick>
* 6.4.0-11
* 6.4.1-0
* 6.4.1-1
* Bad
* 6.4.1-2
* 6.4.1-5
* 6.4.1-10
* 6.4.2-10
* 6.4.5-9
* 6.4.8-0 / Debian 6.4.8.0-1
* 6.5.5-3 / Debian 6.5.5.3-1
* 6.5.8.3-1 from Debian unstable (also in testing)
* Svn trunk (r848)
# 6.4.1-1 -> 6.4.1-2
-CFLAGS = -g -O2 -Wall -W -pthread
+CFLAGS = -fopenmp -g -O2 -Wall -W -pthread
-GOMP_LIBS =
+GOMP_LIBS = -lgomp
-LDFLAGS = -lfreetype -lz
+LDFLAGS = -fopenmp -lfreetype -lz
Etc.
+/usr/include/pthread.h:
+
+/usr/include/pthread/pthread.h:
+
+/usr/include/bits/spin-lock-inline.h:
+
+/usr/include/bits/cancelation.h:
+
+/usr/include/bits/pthread-np.h:
+
+/usr/lib/gcc/i486-gnu/4.4.2/include/omp.h:
# State as of 2011-03-06
freenode, #hurd channel, 2011-03-06:
<pinotree> tschwinge: (speaking on working perl, how did it en with that
"(glibc) double free" crash with perl?)
<pinotree> *end
<tschwinge> I think I remember I suspected it's a libgomp (!) issue in the
end. I have not yet continued working on that.
<pinotree> libogmp? looks like you know more than me, then :)
<youpi> tschwinge: oh, I'm interested
<youpi> I know a bit about libgomp :)
<tschwinge> I bisected this down to where Imagemagick added -fgomp (or
whatever it is). And then the perl library (Imagemagick.pm?) which loads
the imagemagick.so segfaulted.
<tschwinge> ImageMagick did this change in the middle of a x.x.x.something
release..
<tschwinge> My next step would have been to test whether libgomp works at
all for us.
<youpi> ./usr/sbin/debootstrap:DEBOOTSTRAP_CHECKSUM_FIELD="SHA$SHA_SIZE"
<youpi> erf
<youpi> so they switched to another checksum
<youpi> but we don't have that one on all of our packages :)
<youpi> tschwinge:
<youpi> buildd@bach:~$ OMP_NUM_THREADS=2 ./test
<youpi> I'm 0x1
<youpi> I'm 0x3
<youpi> libgomp works at least a bit
<tschwinge> OK.
<pinotree> i guess we should hope the working bits don't stop at that point
;)
<tschwinge> If open_issues/perlmagick is to be believed a diff of 6.4.1-1
and 6.4.1-2 should tell what exactly was changed.
<tschwinge> Oh!
<tschwinge> I even have it on the page already! ;-)
<tschwinge> -fopenmp
<youpi> I've tried the pragmas that imagemagick uses
<youpi> they work
<tschwinge> Might be the issue fixed itself?
<youpi> I don't know, it's the latest libc here
<youpi> (and latest hurd, to be uploaded)
# Other
[[!debbug 551017]]
Code in Svn: `+ 1` missing to account for both `/` and `\0`.
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