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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`.