This is my second post. In the last post i pointed out two errors out
of which one is fixed but the other one is still there.
I am trying to build a sample program on threads in VC++. It compiles
successfully but the linker gives errors of unresolved external
symbols. Please tell me that what "changes" we've to make in VC++ 6
linker options. Please tell me clearly that in which dialog box of
VC++ IDE we have to make changes and how and what changes we've to
made. I am using boost 1_27_0. Program and errors are given below:
********************************************************
The program is:
#include
#include <iostream>
int count = 0;
boost::mutex mutex;
void increment_count()
{
boost::mutex::scoped_lock lock(mutex);
std::cout << "count = " << ++count << std::endl;
}
int main(int argc, char* argv[])
{
boost::thread_group threads;
for (int i = 0; i < 10; ++i)
threads.create_thread(&increment_count);
threads.join_all();
}
********************************************************
The errors i am getting are:
imi.obj : error LNK2001: unresolved external symbol "public:
__thiscall boost::mutex::mutex(void)" (??0mutex@boost@@QAE@XZ)
imi.obj : error LNK2001: unresolved external symbol "public:
__thiscall boost::mutex::~mutex(void)" (??1mutex@boost@@QAE@XZ)
imi.obj : error LNK2001: unresolved external symbol "public:
__thiscall boost::thread_group::~thread_group(void)" (??
1thread_group@boost@@QAE@XZ)
imi.obj : error LNK2001: unresolved external symbol "public: void
__thiscall boost::thread_group::join_all(void)" (?
join_all@thread_group@boost@@QAEXXZ)
imi.obj : error LNK2001: unresolved external symbol "public: class
boost::thread * __thiscall boost::thread_group::create_thread(class
boost::function0 const &)" (?crea
te_thread@thread_group@boost@@QAEPAVthread@2@ABV?
$function0@XUempty_function_policy@boost@@Uempty_function_mixin@2@H@2@
@Z)
imi.obj : error LNK2001: unresolved external symbol "public:
__thiscall boost::thread_group::thread_group(void)" (??
0thread_group@boost@@QAE@XZ)
imi.obj : error LNK2001: unresolved external symbol "public:
__thiscall boost::lock_error::lock_error(void)" (??
0lock_error@boost@@QAE@XZ)
imi.obj : error LNK2001: unresolved external symbol "private: void
__thiscall boost::mutex::do_lock(void)" (?do_lock@mutex@boost@@AAEXXZ)
imi.obj : error LNK2001: unresolved external symbol "private: void
__thiscall boost::mutex::do_unlock(void)" (?
do_unlock@mutex@boost@@AAEXXZ)
Debug/threadImI.exe : fatal error LNK1120: 9 unresolved externals
Error executing link.exe.
threadImI.exe - 10 error(s), 0 warning(s)
