Re: [Boost-users] thread: linux fedora .so built file under c++98 does not provide start_thread() symbol

Subject: Re: [Boost-users] thread: linux fedora .so built file under c++98 does not provide start_thread() symbol
From: Vicente J. Botet Escriba (vicente.botet_at_[hidden])
Date: 2013-10-18 15:57:17

Le 18/10/13 21:39, MM a écrit :
> On 18 October 2013 20:04, Vicente J. Botet Escriba 
> <vicente.botet_at_[hidden] <mailto:vicente.botet_at_[hidden]>> 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
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