On Mon, Jul 16, 2012 at 06:50:34PM +0300, Sergiy Nazarenko wrote:
Hi all!
I would like to compile my project against static libraries
azio.o: In function `boost::asio::detail::posix_tss_ptr_create(unsigned int&)': azio.cpp:(.text._ZN5boost4asio6detail20posix_tss_ptr_createERj[boost::asio::detail::posix_tss_ptr_create(unsigned int&)]+0x19): undefined reference to `pthread_key_create'
So you're not linking in whatever provides the symbol 'pthread_key_create', among others.
I used strings to know where is function pthread_key_create. I found in libboost_thread.so. Next my step was:
'strings' is a very stupid tool. It just looks for things that looks like text and dumps what it finds to the terminal. If you want _intelligent_ querying of symbols used and provided, use 'nm', or some other tool designed to give you correct information.
I've try out to mix up places libraries and object file c++ .. azio.o libboost_system.a libboost_thread.a -o bin/azio c++ .. libboost_system.a libboost_thread.a azio.o -o bin/azio c++ .. libboost_thread.a azio.o libboost_system.a -o bin/azio
But error is still.
This is because you do not provide anything that provides the missing symbols. See your compiler man-pages for the right flag, but it's typically -pthread or -lpthread, as suggested in another mail. Note also that most linkers when linking in static libraries require you to list libraries/objects that require a symbol before libraries/objects that provide it. Your command line should most likely be: $ c++ .. azio.o libboost_thread.a libboost_system.a -lpthread -o bin/azio -- Lars Viklund | zao@acc.umu.se