BuildFailed Error: Cannot build C++ SDK Helloworld with qibuild

Question

I'm trying to install NaoQI C++ SDK on Linux 18.04.1 (VirtualBox). I followed this installation instruction: http://doc.aldebaran.com/2-1/dev/cpp/install_guide.html

My problem is in Part E. Step.3, when I'm trying to run "qibuild make"

I get this error while I'm trying to build the helloworld example:

CMakeFiles/testhelloworld.dir/testhelloworld.cpp.o: In function main': /home/nounou/Documents/SDKfolder/naoqi-sdk/doc/dev/cpp/examples/core/helloworld/testhelloworld.cpp:35: undefined reference toAL::ALBroker::createBroker(std::__cxx11::basic_string, std::allocator > const&, std::__cxx11::basic_string, std::allocator > const&, int, std::__cxx11::basic_string, std::allocator > const&, int, int, std::__cxx11::basic_string, std::allocator >, bool)' /home/nounou/Documents/SDKfolder/naoqi-sdk/doc/dev/cpp/examples/core/helloworld/testhelloworld.cpp:38: undefined reference to AL::ALProxy::ALProxy(boost::shared_ptr<AL::ALBroker>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int, int)' CMakeFiles/testhelloworld.dir/testhelloworld.cpp.o: In functionqi::log::LogStream::~LogStream()':

....

CMakeFiles/testhelloworld.dir/build.make:113: recipe for target 'sdk/bin/testhelloworld' failed make[2]: * [sdk/bin/testhelloworld] Error 1 CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/testhelloworld.dir/all' failed make[1]: * [CMakeFiles/testhelloworld.dir/all] Error 2 Makefile:129: recipe for target 'all' failed make: *** [all] Error 2

[ERROR]: BuildFailed Error occurred when building project hello world

Please, help me if you have any idea about what the problem is. Thank you!

ALProxy is missing from your system, so the compiler cannot link. Either it's installed but not in a path that the compiler can find, or it's not installed. Check to see if "alcommon" library is installed. — Owl
I checked it out. The "alcommon" library is installed. How I can do that the compiler can find it? — noudels
Listing the output of qitoolchain info could help figure out what is going on exactly. — Emile
I have installed the version 2.1.4.13 of the C++ SDK. I have a NAO robot V4. — noudels

Victor Paléologue Victor Paléologue · Accepted Answer · 2018-11-08T10:40:50

Most probably you have an ABI incompatibility issue, due to the transition to C++11. You are using Ubuntu 18.04, which compilers are configured to link with modern C++ libraries, but the toolchain is compiled with former ABIs, and does not enforce compiler flags to ensure compatibility.

To workaround this, either:

Set compiler flags to make sure you don't link against C++11 libraries (if someone knows them, please share).
Compile for the robot instead of your machine, by using the cross-toolchain instead of the Linux toolchain.
Use Ubuntu 12.04, as told in the installation guide.

By the way, in the C++ installation guide, subsection E.4, it says to compile the example under core/sayhelloworld. Here you compiled the example under core/helloworld.

BuildFailed Error: Cannot build C++ SDK Helloworld with qibuild

2 Answers