Re: [Boost-users] Asio does not compile

Subject: Re: [Boost-users] Asio does not compile
From: Alessandro Candini (candini_at_[hidden])
Date: 2011-08-30 06:22:07

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.
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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: [phone]
Fax: [phone]
http://www.meeo.it
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