On 02/18/2013 04:10 PM, Dwight Engen wrote: > On Mon, 18 Feb 2013 15:46:24 -0500 > Stéphane Graber <stgra...@ubuntu.com> wrote: > >> On 02/18/2013 03:40 PM, Daniel Lezcano 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. > > Also see commit 5f29734f. I believe we found that nm showed sem_* to be > coming from libpthread and not librt, in spite of the fact that I've > seen some (older?) man pages that say "Link with -lrt or -pthread".
nm says that librt doesn't have any symbol here, I guess that's part of the issue then... >>> >>> Could you give the output of dpkg ? >> >> From "man sem_open": >> Link with -pthread. >> >> dpkg-shlibdeps output: >> dpkg-shlibdeps: warning: symbol sem_post used by >> debian/liblxc0/usr/lib/x86_64-linux-gnu/liblxc.so.0.9.0.alpha3 found >> in none of the libraries >> dpkg-shlibdeps: warning: symbol sem_open used by >> debian/liblxc0/usr/lib/x86_64-linux-gnu/liblxc.so.0.9.0.alpha3 found >> in none of the libraries >> dpkg-shlibdeps: warning: symbol sem_close used by >> debian/liblxc0/usr/lib/x86_64-linux-gnu/liblxc.so.0.9.0.alpha3 found >> in none of the libraries >> dpkg-shlibdeps: warning: symbol sem_init used by >> debian/liblxc0/usr/lib/x86_64-linux-gnu/liblxc.so.0.9.0.alpha3 found >> in none of the libraries >> dpkg-shlibdeps: warning: symbol sem_timedwait used by >> debian/liblxc0/usr/lib/x86_64-linux-gnu/liblxc.so.0.9.0.alpha3 found >> in none of the libraries >> dpkg-shlibdeps: warning: symbol sem_destroy used by >> debian/liblxc0/usr/lib/x86_64-linux-gnu/liblxc.so.0.9.0.alpha3 found >> in none of the libraries >> dpkg-shlibdeps: warning: symbol sem_wait used by >> debian/liblxc0/usr/lib/x86_64-linux-gnu/liblxc.so.0.9.0.alpha3 found >> in none of the libraries >> >> >> Looking at pthread.so it appears to provide: >> sem_init >> sem_destroy >> sem_open >> sem_close >> sem_unlink >> sem_getvalue >> sem_wait >> sem_trywait >> sem_timedwait >> sem_post >> >>>> >>>> Signed-off-by: Stéphane Graber <stgra...@ubuntu.com> >>>> --- >>>> src/lxc/Makefile.am | 2 +- >>>> 1 file changed, 1 insertion(+), 1 deletion(-) >>>> >>>> diff --git a/src/lxc/Makefile.am b/src/lxc/Makefile.am >>>> index 8974ca9..a0077aa 100644 >>>> --- a/src/lxc/Makefile.am >>>> +++ b/src/lxc/Makefile.am >>>> @@ -115,7 +115,7 @@ liblxc_so_LDFLAGS = \ >>>> liblxc_so_LDADD = $(CAP_LIBS) $(APPARMOR_LIBS) $(SECCOMP_LIBS) >>>> >>>> if !IS_BIONIC >>>> -liblxc_so_LDADD += -lutil -lrt >>>> +liblxc_so_LDADD += -lutil -lrt -lpthread >>>> endif >>>> >>>> bin_SCRIPTS = \ >>> >> >> > -- Stéphane Graber Ubuntu developer http://www.ubuntu.com
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