[boost] Re: program-options thread problem

From: Neal D. Becker (ndbecker2_at_[hidden])
Date: 2004-04-26 06:50:18

Vladimir Prus wrote:

> Hi Neal,
> 
>> I have both added current program-options to my boost build tree, and all
>> the usual variants of libboost_program_options-gcc.a, also
>> libboost_python-gcc-mt.a.
>> 
>> Linking against libboost_program_options-gcc.a I get errors about pthread
>> symbols.  Adding -pthread fixes it.  It looks to me that
>> libboost_program_options-gcc.a
>> is referencing pthread symbols.
>> 
>> nm
>> /usr/local/src/boost_1_31_0.gcc34/stage/lib/libboost_program_options-gcc.a
>> | grep thread
>>          U pthread_mutex_destroy
>>          U pthread_mutex_init
>>          w pthread_mutex_lock
>>          w pthread_mutex_unlock
>>          w pthread_mutex_lock
>>          w pthread_mutex_unlock
>> 
>> Yup,sure is.
> 
> Interesting, I sure don't use any mutexes directly. This could be because
> I use shared_ptr which uses boost::mutex in MT builds. Maybe, you're using
> MT build of the program_options library?
> 

No, as the above shows, the symbols are in the non-mt version of the
library.  There is also libboost_python-gcc-mt.a, that's not the one I'm
showing above.