[[!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 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]]."]]"""]] [[!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 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 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) while it failed previously indeed we might simply need to rebuild perl against it (I see ifdef pthread_atfork in perl) ## undefined reference to `__start__hurd_atfork_prepare_hook' ### IRC, freenode, #hurd, 2013-10-16 tschwinge: I'd love to try your cross-gnu tool, the wiki page suggests that the list of required source packages is outdated.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? 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 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 does anyone know where the _hurd_atfork_* group of symbols referenced in glibc are defined (if anywhere)? AliciaC: it's the DEFINE_HOOK (_hurd_atfork_prepare_hook, (void)); in glibc/sysdeps/mach/hurd/fork.c hm, is that not just a declaration? no, it's a definition, as its name suggests : (despite the macro name) :) ok 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 I mean, I do get undefined references, but question is if it's to things that should have been defined or not what undefined references do you gaT? s/gaT/get I'll get back to you once I have that system up again youpi: sysdeps/mach/hurd/fork.c:70: undefined reference to `__start__hurd_atfork_prepare_hook' fork.c:70: 'RUN_HOOK (_hurd_atfork_prepare_hook, ());' DEFINE_HOOK (_hurd_atfork_prepare_hook, (void)); is higher up in the file 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"]]