On 30/08/11 12:07, Thomas Heller wrote:
On Tuesday, August 30, 2011 11:08:56 AM Alessandro Candini wrote:
My code (simplyfication of this: http://www.boost.org/doc/libs/1_47_0/doc/html/boost_asio/tutorial/tuttimer1/ src.html): Being pedantic ... It does compile, the linker doesn't find the symbols. You need to link against the boost system and pthread library
#include<iostream> #include</usr/local/include/boost/asio.hpp> // Boost version 1.47.0 int main() { return 0; }
Compilation command: g++ -Wall -o timer1 timer1.cpp
Error: /tmp/ccGUgnoD.o: In function `__static_initialization_and_destruction_0(int, int)': timer1.cpp:(.text+0x52): undefined reference to `boost::system::generic_category()' timer1.cpp:(.text+0x5e): undefined reference to `boost::system::generic_category()' timer1.cpp:(.text+0x6a): undefined reference to `boost::system::system_category()' /tmp/ccGUgnoD.o: In function `boost::asio::error::get_system_category()': timer1.cpp:(.text._ZN5boost4asio5error19get_system_categoryEv[boost::asio::e rror::get_system_category()]+0x5): undefined reference to `boost::system::system_category()' /tmp/ccGUgnoD.o: In function `boost::asio::detail::posix_tss_ptr_create(unsigned int&)': timer1.cpp:(.text._ZN5boost4asio6detail20posix_tss_ptr_createERj[boost::asio ::detail::posix_tss_ptr_create(unsigned int&)]+0x19): undefined reference to `pthread_key_create' /tmp/ccGUgnoD.o: In function `boost::asio::detail::posix_tss_ptr<boost::asio::detail::call_stack<boost::a sio::detail::task_io_service>::context>::~posix_tss_ptr()': timer1.cpp:(.text._ZN5boost4asio6detail13posix_tss_ptrINS1_10call_stackINS1 _15task_io_serviceEE7contextEED2Ev[_ZN5boost4asio6detail13posix_tss_ptrINS1_ 10call_stackINS1_15task_io_serviceEE7contextEED5Ev]+0x15): undefined reference to `pthread_key_delete' /tmp/ccGUgnoD.o: In function `boost::asio::detail::posix_tss_ptr<boost::asio::detail::call_stack<boost::a sio::detail::strand_service::strand_impl>::context>::~posix_tss_ptr()': timer1.cpp:(.text._ZN5boost4asio6detail13posix_tss_ptrINS1_10call_stackINS1 _14strand_service11strand_implEE7contextEED2Ev[_ZN5boost4asio6detail13posix_ tss_ptrINS1_10call_stackINS1_14strand_service11strand_implEE7contextEED5Ev]+ 0x15): undefined reference to `pthread_key_delete' collect2: ld returned 1 exit status make: *** [all] Error 1
Any ideas?
Thanks in advance.
Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users You are right! With the following compilation line, it compiles and links like a charm:
g++ -Wall -pedantic -pthread -lboost_system -o timer1 timer1.cpp Thank you! -- Alessandro Candini MEEO S.r.l. Via Saragat 9 I-44122 Ferrara, Italy Tel: +39 0532 1861501 Fax: +39 0532 1861637 http://www.meeo.it ======================================== "ATTENZIONE:le informazioni contenute in questo messaggio sono da considerarsi confidenziali ed il loro utilizzo è riservato unicamente al destinatario sopra indicato. Chi dovesse ricevere questo messaggio per errore è tenuto ad informare il mittente ed a rimuoverlo definitivamente da ogni supporto elettronico o cartaceo." "WARNING:This message contains confidential and/or proprietary information which may be subject to privilege or immunity and which is intended for use of its addressee only. Should you receive this message in error, you are kindly requested to inform the sender and to definitively remove it from any paper or electronic format."