On 02/19/2013 09:19 AM, Serge Hallyn wrote: > Quoting Natanael Copa (nc...@alpinelinux.org): >> On Mon, 18 Feb 2013 21:40:42 +0100 >> Daniel Lezcano <daniel.lezc...@free.fr> wrote: >> >>> On 02/18/2013 06:23 PM, Stéphane Graber wrote: >>>> dpkg spotted that we're not explicitly linking against pthread even though >>>> we use some of its symbols (sem_*). >>> >>> uh ? wait. >>> >>> We shouldn't link against the lib pthread. >>> >>> I don't think sem_* is a symbol coming from the pthread library. >> >> Seems to be with uClibc: >> >> ncopa-desktop:~$ nm -D /lib/libpthread.so.0.9.32 | grep sem_ >> 000000000000d168 T __new_sem_destroy >> 000000000000a914 T __new_sem_getvalue >> 000000000000a414 T __new_sem_init >> 000000000000c219 T sem_close >> 000000000000d168 W sem_destroy >> 000000000000a914 W sem_getvalue >> 000000000000a414 W sem_init >> 000000000000c744 T sem_open >> 0000000000006db0 T sem_post >> 0000000000006e00 T sem_timedwait >> 0000000000006f80 T sem_trywait >> 00000000000095c8 T sem_unlink >> 0000000000006fb0 T sem_wait >> >> How about let autoconf detect what to link against? >> >> @@ -274,6 +274,9 @@ AC_CHECK_HEADERS([sys/signalfd.h pty.h sys/capability.h >> sys/ >> # Check for some syscalls functions >> AC_CHECK_FUNCS([setns pivot_root sethostname unshare]) >> >> +# find library for sem_* >> +AC_SEARCH_LIBS(sem_open, [pthread rt]) > > I like it. thanks.
Won't that cause lxc to link against pthread on most distros which based on the previous e-mails is something we want to avoid? I guess we'd want [rt pthread], though as was discussed earlier, it's very likely that this will fail as for some reason the tools don't see that librt contains the sem_* symbols. >> + >> # Check for some functions >> AC_CHECK_LIB(util, openpty) >> AC_CHECK_FUNCS([openpty hasmntopt setmntent endmntent]) >> >> >> >> >> ------------------------------------------------------------------------------ >> Everyone hates slow websites. So do we. >> Make your web apps faster with AppDynamics >> Download AppDynamics Lite for free today: >> http://p.sf.net/sfu/appdyn_d2d_feb >> _______________________________________________ >> Lxc-devel mailing list >> Lxc-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/lxc-devel > > ------------------------------------------------------------------------------ > Everyone hates slow websites. So do we. > Make your web apps faster with AppDynamics > Download AppDynamics Lite for free today: > http://p.sf.net/sfu/appdyn_d2d_feb > _______________________________________________ > Lxc-devel mailing list > Lxc-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/lxc-devel > -- Stéphane Graber -- Stéphane Graber Ubuntu developer http://www.ubuntu.com
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