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[[!meta copyright="Copyright © 2011, 2013 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
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Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
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License|/fdl]]."]]"""]]
[[!tag open_issue_glibc open_issue_libpthread]]
`pthread_atfork` is not actually implemented, making some programs fail. Code
can probably be borrowed from `nptl/sysdeps/unix/sysv/linux/register-atfork.c`.
# IRC, OFTC, #debian-hurd, 2013-08-21
<pinotree> SRCDIR/opal/mca/memory/linux/arena.c:387: warning: warning:
pthread_atfork is not implemented and will always fail
# Samuel's implementation
TODO.
## IRC, OFTC, #debian-hurd, 2013-10-08
<pinotree> youpi: if you need/want to test your pthread_atfork
implementation, you can check libposix-atfork-perl and its test suite
(whose test 004 hangs now, with eglibc -93)
<youpi> while it failed previously indeed
<youpi> we might simply need to rebuild perl against it
<youpi> (I see ifdef pthread_atfork in perl)
## undefined reference to `__start__hurd_atfork_prepare_hook'
### IRC, freenode, #hurd, 2013-10-16
<teythoon> tschwinge: I'd love to try your cross-gnu tool, the wiki page
suggests that the list of required source packages is outdated. can you
give me some hints?
<teythoon> tschwinge: I got this error running cross-gnu:
http://paste.debian.net/58303/
make[4]: Leaving directory `/home/teythoon/repos/hurd/cross/src/glibc/setjmp'
make subdir=string -C ../string ..=../ objdir=/home/teythoon/repos/hurd/cross/obj/glibc -f Makefile -f ../elf/rtld-Rules rtld-all rtld-modules='rtld-strchr.os rtld-strcmp.os rtld-strcpy.os rtld-strlen.os rtld-strnlen.os rtld-memchr.os rtld-memcmp.os rtld-memmove.os rtld-memset.os rtld-mempcpy.os rtld-stpcpy.os rtld-memcpy.os rtld-rawmemchr.os rtld-argz-count.os rtld-argz-extract.os rtld-stpncpy.os'
make[4]: Entering directory `/home/teythoon/repos/hurd/cross/src/glibc/string'
make[4]: Leaving directory `/home/teythoon/repos/hurd/cross/src/glibc/string'
make[4]: Entering directory `/home/teythoon/repos/hurd/cross/src/glibc/string'
make[4]: Nothing to be done for `rtld-all'.
make[4]: Leaving directory `/home/teythoon/repos/hurd/cross/src/glibc/string'
make[3]: Leaving directory `/home/teythoon/repos/hurd/cross/src/glibc/elf'
i686-pc-gnu-gcc -shared -static-libgcc -Wl,-O1 -Wl,-z,defs -Wl,-dynamic-linker=/lib/ld.so.1 -B/home/teythoon/repos/hurd/cross/obj/glibc/csu/ -Wl,--version-script=/home/teythoon/repos/hurd/cross/obj/glibc/libc.map -Wl,-soname=libc.so.0.3 -Wl,-z,combreloc -Wl,-z,relro -Wl,--hash-style=both -nostdlib -nostartfiles -e __libc_main -L/home/teythoon/repos/hurd/cross/obj/glibc -L/home/teythoon/repos/hurd/cross/obj/glibc/math -L/home/teythoon/repos/hurd/cross/obj/glibc/elf -L/home/teythoon/repos/hurd/cross/obj/glibc/dlfcn -L/home/teythoon/repos/hurd/cross/obj/glibc/nss -L/home/teythoon/repos/hurd/cross/obj/glibc/nis -L/home/teythoon/repos/hurd/cross/obj/glibc/rt -L/home/teythoon/repos/hurd/cross/obj/glibc/resolv -L/home/teythoon/repos/hurd/cross/obj/glibc/crypt -L/home/teythoon/repos/hurd/cross/obj/glibc/mach -L/home/teythoon/repos/hurd/cross/obj/glibc/hurd -Wl,-rpath-link=/home/teythoon/repos/hurd/cross/obj/glibc:/home/teythoon/repos/hurd/cross/obj/glibc/math:/home/teythoon/repos/hurd/cross/obj/glibc/elf:/home/teythoon/repos/hurd/cross/obj/glibc/dlfcn:/home/teythoon/repos/hurd/cross/obj/glibc/nss:/home/teythoon/repos/hurd/cross/obj/glibc/nis:/home/teythoon/repos/hurd/cross/obj/glibc/rt:/home/teythoon/repos/hurd/cross/obj/glibc/resolv:/home/teythoon/repos/hurd/cross/obj/glibc/crypt:/home/teythoon/repos/hurd/cross/obj/glibc/mach:/home/teythoon/repos/hurd/cross/obj/glibc/hurd -o /home/teythoon/repos/hurd/cross/obj/glibc/libc.so -T /home/teythoon/repos/hurd/cross/obj/glibc/shlib.lds /home/teythoon/repos/hurd/cross/obj/glibc/csu/abi-note.o /home/teythoon/repos/hurd/cross/obj/glibc/elf/soinit.os /home/teythoon/repos/hurd/cross/obj/glibc/libc_pic.os /home/teythoon/repos/hurd/cross/obj/glibc/elf/sofini.os /home/teythoon/repos/hurd/cross/obj/glibc/elf/interp.os /home/teythoon/repos/hurd/cross/obj/glibc/elf/ld.so /home/teythoon/repos/hurd/cross/obj/glibc/mach/libmachuser-link.so /home/teythoon/repos/hurd/cross/obj/glibc/hurd/libhurduser-link.so -lgcc
/home/teythoon/repos/hurd/cross/obj/glibc/libc_pic.os: In function `__fork':
/home/teythoon/repos/hurd/cross/src/glibc/posix/../sysdeps/mach/hurd/fork.c:70: undefined reference to `__start__hurd_atfork_prepare_hook'
/home/teythoon/repos/hurd/cross/lib/gcc/i686-pc-gnu/4.8.1/../../../../i686-pc-gnu/bin/ld: /home/teythoon/repos/hurd/cross/obj/glibc/libc_pic.os: relocation R_386_GOTOFF against undefined hidden symbol `__start__hurd_atfork_prepare_hook' can not be used when making a shared object
/home/teythoon/repos/hurd/cross/lib/gcc/i686-pc-gnu/4.8.1/../../../../i686-pc-gnu/bin/ld: final link failed: Bad value
collect2: error: ld returned 1 exit status
make[2]: *** [/home/teythoon/repos/hurd/cross/obj/glibc/libc.so] Error 1
make[2]: Leaving directory `/home/teythoon/repos/hurd/cross/src/glibc/elf'
make[1]: *** [elf/subdir_lib] Error 2
make[1]: Leaving directory `/home/teythoon/repos/hurd/cross/src/glibc'
make: *** [all] Error 2
+ rm -f /home/teythoon/repos/hurd/cross/sys_root/lib/ld.so
+ exit 100
binutils-2.23.2,
gcc-4.8.1,
everything else is from git as specified in the wiki.
### IRC, freenode, #hurd, 2013-10-24
<AliciaC> in recent glibc commits (tschwinge/Roger_Whittaker branch) there
are references to _hurd_atfork_* symbols in sysdeps/mach/hurd/fork.c, and
some _hurd_fork_* symbols, some of the _hurd_fork_* symbols seem to be
defined in Hurd's boot/frankemul.ld (mostly guessing by their names being
mentioned, I don't know linker script syntax), but those _hurd_atfork_*
symbols don't seem to be defined there, are they supposed to be defined
elsewhere or is th
<AliciaC> does anyone know where the _hurd_atfork_* group of symbols
referenced in glibc are defined (if anywhere)?
<youpi> AliciaC: it's the DEFINE_HOOK (_hurd_atfork_prepare_hook, (void));
in glibc/sysdeps/mach/hurd/fork.c
<AliciaC> hm, is that not just a declaration?
<youpi> no, it's a definition, as its name suggests :
<AliciaC> (despite the macro name)
<youpi> :)
<AliciaC> ok
<AliciaC> I should look into it more, I could have sworn I was getting
undefined references, but maybe the symbol names used are different from
those defined, but that'd be odd as well, in the same file and all
<AliciaC> I mean, I do get undefined references, but question is if it's to
things that should have been defined or not
<youpi> what undefined references do you gaT?
<youpi> s/gaT/get
<AliciaC> I'll get back to you once I have that system up again
<AliciaC> youpi: sysdeps/mach/hurd/fork.c:70: undefined reference to
`__start__hurd_atfork_prepare_hook'
<AliciaC> fork.c:70: 'RUN_HOOK (_hurd_atfork_prepare_hook, ());'
<AliciaC> DEFINE_HOOK (_hurd_atfork_prepare_hook, (void)); is higher up in
the file
<AliciaC> though there is also this message: build/libc_pic.os: relocation
R_386_GOTOFF against undefined hidden symbol
`__start__hurd_atfork_prepare_hook' can not be used when making a shared
object
### [[!message-id "878uvfmwvs.fsf@kepler.schwinge.homeip.net"]]
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