Le 18/10/13 21:39, MM a écrit :

On 18 October 2013 20:04, Vicente J. Botet Escriba mailto:vicente.botet@wanadoo.fr> wrote:

Le 18/10/13 20:50, MM a écrit :

hello,

I am compiling my code with g++4.8.1 under c++11 mode, however the fedora's system provided boost thread lib has been compiled under c++98.

Linking fails because of errors like:

mainthread.cpp:(.text+0x2cf): undefined reference to `boost::thread::start_thread()' mainthread.cpp:(.text+0xcc9): undefined reference to `boost::thread::join()'

looking at the provided shared object, nm -C -D /usr/lib64/libboost_thread-mt.so.1.53.0 |grep start_thread

000000000000ba80 T boost::thread::start_thread_noexcept(boost::thread_attributes const&) 000000000000ba00 T boost::thread::start_thread_noexcept()

neither of which is start_thread()

I've put an entry here https://bugzilla.redhat.com/show_bug.cgi?id=1021009

Is there a possible workaround?

Are you sure your compiling with Boost 1.53? start_thread is defined in boost/thread/detail/thread.h lines 178-184 as

void start_thread() { if (!start_thread_noexcept()) { boost::throw_exception(thread_resource_error()); } }

Indeed, this file (thread.hpp not .h) is there and has the same code at the same lines. However /usr/lib64/libboost_thread-mt.so.1.53.0 doesn't have start_thread() symbol at all. start_thread_noexcept() is there though.

start_thread is defined inside a class and would expect it to be inlined. I don't understand why the symbols is unresolved. Please could you compile with -E and take a look at the preprocessed output?

Fedora guys said they compile with g++4.8 but with c++98, not c++11 Does it works if you compile with c++98?

Best, Vicente

Please could you check this file and the contexts of this linenes

Best, Vicente _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org mailto:Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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Le 21/10/13 14:41, MM a écrit :

On 18 October 2013 20:57, Vicente J. Botet Escriba mailto:vicente.botet@wanadoo.fr> wrote:

Le 18/10/13 21:39, MM a écrit :

...

On 18 October 2013 20:04, Vicente J. Botet Escriba mailto:vicente.botet@wanadoo.fr> wrote:

Le 18/10/13 20:50, MM a écrit :

Are you sure your compiling with Boost 1.53? start_thread is defined in boost/thread/detail/thread.h lines 178-184 as

void start_thread() { if (!start_thread_noexcept()) { boost::throw_exception(thread_resource_error()); } }

Indeed, this file (thread.hpp not .h) is there and has the same code at the same lines. However /usr/lib64/libboost_thread-mt.so.1.53.0 doesn't have start_thread() symbol at all. start_thread_noexcept() is there though.

start_thread is defined inside a class and would expect it to be inlined. I don't understand why the symbols is unresolved. Please could you compile with -E and take a look at the preprocessed output?

...

Fedora guys said they compile with g++4.8 but with c++98, not c++11

Does it works if you compile with c++98?

I use some c++11 additions so I couldn't.

Best, Vicente

I have actually just switched from the linker (ld.bdf) to the 'new' gold linker and it solved the problem,. Perhaps listbboost had been built by fedora with gold, and my system was using bdf instead,

Glad to see that this was a build issue. Vicente