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. > > 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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