C++ linux : error: ‘move’ is not a member of ‘std’ how to get around it?

Question

So on my VS2010 I can compile code like :

boost::shared_ptr<boost::thread> internal_thread;
boost::packaged_task<void> internal_task_w(boost::bind(&thread_pool::internal_run, this, internal_thread));
internal_thread = boost::shared_ptr<boost::thread>( new boost::thread(std::move(internal_task_w)));

first 2 lines are ok with boost 1.47.0 and linux... but on std::move it gives error: ‘move’ is not a member of ‘std’. On VS2010 it does not require any special header. So I wonder which header it requires on linux and is it in its STD anyway? If not how to get around it with boost or something?

Solution 1

To get g++ into C++11 (or C++0x) mode, you have to add the command-line parameter -std=c++0x on versions <= 4.6, nowadays you can also use -std=c++11.

Solution 2

You are using the most recent Visual Studio, but not the most recent GCC. The std::move capability is available in the most recent GCC. It is a new feature of C++11.

Comments

[dee-see]

Related: What std::move() is?

[Steve Jessop]

To answer the "which header" bit, it's in <utility>, but you may well find that many other standard headers include that in any given implementation, hence the impression that it doesn't require any special header.

[Nebril]

On gcc 4.7.3 I also had to #include <utility> to get rid of this error.

[Sammy]

Thanks, -std=c++11 is the solution. Surprised, c++11 is not the default compiler for Ubuntu 16.04LTS

[PlasmaBinturong]

How do you make it work using cmake and make? How would you pass this option?

[filmor]

@PlasmaBinturong Look here: stackoverflow.com/questions/10851247/…