Ocaml and pthread_atfork()
Tony Breeds
tony at bakeyournoodle.com
Tue Apr 17 03:02:29 UTC 2012
Hi All,
Firstly I apologize if this is noise. I elected to not file a
bugzilla as the problem seems to be powerpc specific and with the limited
resources for Fedora developers it would seem unfair.
I was recently trying to build a "current" libguestfs from the f16
branch[1]. During the build I hit:
(extracted from rpmbuild)
[tony at sneetch ~]$ bash -x tmp/ocaml-test.sh
+ cd rpmbuild/BUILD/libguestfs-1.16.9/ocaml/
+ LD_LIBRARY_PATH=../src/.libs
+ ocamlfind ocamlc -g -warn-error CDEFLMPSUVYZX -I . -package unix,threads -thread -linkpkg mlguestfs.cma t/guestfs_070_threads.cmo -o t/guestfs_070_threads.bc
File "_none_", line 1, characters 0-1:
Error: Error on dynamically loaded library: /usr/lib64/ocaml/stublibs/dllthreads.so: /usr/lib64/ocaml/stublibs/dllthreads.so: undefined symbol: pthread_atfork
I did a quick bit of googling and found:
http://ryanarn.blogspot.com.au/2011/07/curious-case-of-pthreadatfork-on.html
which seems to explain what's going on to my naive eye anyway.
I've tried a few different CFLAGS/patches to
otherlibs/systhreads/Makefile to try and induce pthreads_atfork() to be
resolved and linked during the ocaml build. Nothing I try works.
Does anyone have any ideas on how to solve this?
I'm happy to do the heavy lifting I just don't have the background in
ocaml to solve this by myself.
Yours Tony
[1] I suspects that as a result of the demotion to secondary and things
languishing there we skipped a few builds.
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