Creating CMake project for embedded target without Qt fails

azarubkin

Hello everyone,

I'm trying to set up a simple CMake project in Qt Creator to test cross-compiling to Beaglebone Black single-board computer. My OS is Ubuntu 18.04. I've installed a cross compiler, tested it from command line. The compiled hello world program runs on Beaglebone.
The next step is to create a project in Qt Creator. What I did:

Installed CMake 3.21
Ensured that cross compiler is auto detected in Qt Creator
Added a kit to Qt Creator settings that uses the cross compiler
Specified the path to sysroot of Beaglebone
Set Qt profile to None

When I create a CMake project, I get the following messages:

Starting /usr/bin/cmake -S /home/azarubkin/beaglebone/fails_by_default -B /tmp/QtCreator-oBRncD/qtc-cmake-uOFBOzMA '-GUnix Makefiles' -DCMAKE_BUILD_TYPE:String=Debug -DCMAKE_SYSROOT:PATH=/home/azarubkin/beaglebone/rootfs -DCMAKE_C_COMPILER_TARGET:STRING=arm-linux-gnueabihf -DCMAKE_CXX_COMPILER_TARGET:STRING=arm-linux-gnueabihf -DQT_QMAKE_EXECUTABLE:STRING= -DCMAKE_PREFIX_PATH:STRING= -DCMAKE_C_COMPILER:STRING=/usr/bin/arm-linux-gnueabihf-gcc -DCMAKE_CXX_COMPILER:STRING=/usr/bin/arm-linux-gnueabihf-g++ на /tmp/QtCreator-oBRncD/qtc-cmake-uOFBOzMA.
-- The CXX compiler identification is GNU 7.5.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - failed
-- Check for working CXX compiler: /usr/bin/arm-linux-gnueabihf-g++
-- Check for working CXX compiler: /usr/bin/arm-linux-gnueabihf-g++ - broken
-- Configuring incomplete, errors occurred!
See also "/tmp/QtCreator-oBRncD/qtc-cmake-uOFBOzMA/CMakeFiles/CMakeOutput.log".
See also "/tmp/QtCreator-oBRncD/qtc-cmake-uOFBOzMA/CMakeFiles/CMakeError.log".
CMake Error at /usr/share/cmake-3.21/Modules/CMakeTestCXXCompiler.cmake:62 (message):
  The C++ compiler

    "/usr/bin/arm-linux-gnueabihf-g++"

  is not able to compile a simple test program.

  It fails with the following output:

    Change Dir: /tmp/QtCreator-oBRncD/qtc-cmake-uOFBOzMA/CMakeFiles/CMakeTmp
    
    Run Build Command(s):/home/azarubkin/beaglebone/rootfs/usr/bin/make -f Makefile cmTC_b5327/fast && /lib/ld-linux-armhf.so.3: No such file or directory
    
    

  

  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:3 (project)


CMake process finished with code 1.

And the parsing of the project fails. As you can see, CMake tries to invoke make from within the sysroot, no wonder it fails, it's compiled for a different CPU architecture. If I remove sysroot, it works.
But how can I fix it when sysroot path is given? I need it for linking to additional libraries.

kuzulis

If CMake is not a mandatory choosing for you, then you can use QBS as a build system instead. Because the QBS is a simplest ans a fastest way todo what you want. ;)

azarubkin

@kuzulis Thanks, but I would like my project to be capable of opening in other IDEs like Eclipse. I think it rules QBS out. By the way, the Qt Company moved from QBS to CMake itself, didn't it?

kuzulis

Yes, it is. But Qbs is better (IMHO), and you can use QtCreator && VSCode IDEs. ;)
CMake it is pain...