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External libraries on Raspberry Pi 3 B+

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  • K koahnig

    @Crindu said in External libraries on Raspberry Pi 3 B+:

    @koahnig Sorry I don't know what do you mean for dynamic link compilation.
    The cross compiler generates only .a files that are static library and I added these to the .pro file, maybe this is the problem.

    When you create an application you have to decide how to link external libraries. Either "Static" or "Dynamically linked shared object libraries" (probably called in linux). In windows those libraries are called "dll"->"dynamic link library".
    The "dynamic linked shared object library" has typically extensions *.so and often followed by version numbers. Those go along with your application for deployment.

    When you are using a static library it is only one file per library. This file is directly linked to your application and makes the application typically much bigger.

    There are also the libraries with the "stumps" which have to be linked to your application. Typical extension is *.a. Typically they are smaller than the .so files and increase the size of your application insignificantly. The "stumps" tell your app how to access the "dynamic linked shared object library".

    If your library is called "somelibrary" you probably will have a file called "somelibrary.a" and a file "somelibrary.so"

    C Offline
    C Offline
    Crindu
    wrote on last edited by
    #10

    @koahnig Ok thanks, I linked them dinamically but nothing, always undefined reference error. Maybe I did some mistakes in the toolchain, or in the settings of the cross compiler because this is very strange. In the project that runs on pc I didn't have all these problems

    jsulmJ 1 Reply Last reply
    0
    • C Crindu

      @koahnig Ok thanks, I linked them dinamically but nothing, always undefined reference error. Maybe I did some mistakes in the toolchain, or in the settings of the cross compiler because this is very strange. In the project that runs on pc I didn't have all these problems

      jsulmJ Offline
      jsulmJ Offline
      jsulm
      Lifetime Qt Champion
      wrote on last edited by
      #11

      @Crindu Can you please show the actual errors? Or better the whole compiler output. You get undefined reference errors during linking of your app. Most probably the linker cannot find the lib or it isn't compatible.

      https://forum.qt.io/topic/113070/qt-code-of-conduct

      C 1 Reply Last reply
      1
      • sneubertS Offline
        sneubertS Offline
        sneubert
        wrote on last edited by
        #12

        In most cases there´s no need to compile 3rd party libs with the cross-compiler. You can install the dev packages on your rpi for most of the libs. To use them in you cross-compile projecte you have to rsync from rpi -> dev host again.

        C 1 Reply Last reply
        1
        • jsulmJ jsulm

          @Crindu Can you please show the actual errors? Or better the whole compiler output. You get undefined reference errors during linking of your app. Most probably the linker cannot find the lib or it isn't compatible.

          C Offline
          C Offline
          Crindu
          wrote on last edited by
          #13

          @jsulm

          09:30:14: Running steps for project untitled1...
09:30:14: Configuration unchanged, skipping qmake step.
09:30:14: Starting: "/usr/bin/make" 
/home/cristiano/raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf-g++ -mfloat-abi=hard --sysroot=/home/cristiano/raspi/sysroot -Wl,-rpath-link,/home/cristiano/raspi/sysroot/opt/vc/lib -Wl,-rpath-link,/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf -Wl,-rpath-link,/home/cristiano/raspi/sysroot/lib/arm-linux-gnueabihf -o untitled1 main.o   -lpthread -L/home/cristiano/FFmpeg-compiled/compiled/lib -lavcodec -lavdevice -lavutil -lavformat -lavfilter -lswscale -lswresample 
main.o: In function `main':
/home/cristiano/untitled1/main.cpp:8: undefined reference to `av_register_all()'
/home/cristiano/untitled1/main.cpp:9: undefined reference to `avcodec_register_all()'
/home/cristiano/untitled1/main.cpp:10: undefined reference to `avdevice_register_all()'
Makefile:139: recipe for target 'untitled1' failed
collect2: error: ld returned 1 exit status
make: *** [untitled1] Error 1
09:30:14: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project untitled1 (kit: Raspberry kit)
When executing step "Make"
09:30:14: Elapsed time: 00:00.

          The libraries are compatible, this is the file command output:
          libavcodec.so.58.20.104: ELF 32-bit LSB shared object, ARM, EABI5 version 1 (SYSV), dynamically linked, BuildID[sha1]=6182340cbdd8c56e7c410638a62e92dd0249e82c, stripped

          This is my pro. file:

          TEMPLATE = app
CONFIG += console c++11
CONFIG -= app_bundle
CONFIG -= qt
SOURCES += main.cpp
INSTALLS        = target
target.files    = untitled1
target.path     = /home/pi
LIBS += -lpthread

INCLUDEPATH += /home/cristiano/FFmpeg-compiled/compiled/include

LIBS += -L/home/cristiano/FFmpeg-compiled/compiled/lib -lavcodec -lavdevice -lavutil -lavformat -lavfilter -lswscale -lswresample
          jsulmJ 1 Reply Last reply
          0
          • sneubertS sneubert

            In most cases there´s no need to compile 3rd party libs with the cross-compiler. You can install the dev packages on your rpi for most of the libs. To use them in you cross-compile projecte you have to rsync from rpi -> dev host again.

            C Offline
            C Offline
            Crindu
            wrote on last edited by
            #14

            @sneubert Can you post your rsync example? I don't know exactly what and where to copy. Do I have to copy only the folders in which FFmpeg was installed or everything from the Raspberry in the sysroot folder ?

            1 Reply Last reply
            0
            • C Crindu

              @jsulm

              09:30:14: Running steps for project untitled1...
09:30:14: Configuration unchanged, skipping qmake step.
09:30:14: Starting: "/usr/bin/make" 
/home/cristiano/raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf-g++ -mfloat-abi=hard --sysroot=/home/cristiano/raspi/sysroot -Wl,-rpath-link,/home/cristiano/raspi/sysroot/opt/vc/lib -Wl,-rpath-link,/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf -Wl,-rpath-link,/home/cristiano/raspi/sysroot/lib/arm-linux-gnueabihf -o untitled1 main.o   -lpthread -L/home/cristiano/FFmpeg-compiled/compiled/lib -lavcodec -lavdevice -lavutil -lavformat -lavfilter -lswscale -lswresample 
main.o: In function `main':
/home/cristiano/untitled1/main.cpp:8: undefined reference to `av_register_all()'
/home/cristiano/untitled1/main.cpp:9: undefined reference to `avcodec_register_all()'
/home/cristiano/untitled1/main.cpp:10: undefined reference to `avdevice_register_all()'
Makefile:139: recipe for target 'untitled1' failed
collect2: error: ld returned 1 exit status
make: *** [untitled1] Error 1
09:30:14: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project untitled1 (kit: Raspberry kit)
When executing step "Make"
09:30:14: Elapsed time: 00:00.

              The libraries are compatible, this is the file command output:
              libavcodec.so.58.20.104: ELF 32-bit LSB shared object, ARM, EABI5 version 1 (SYSV), dynamically linked, BuildID[sha1]=6182340cbdd8c56e7c410638a62e92dd0249e82c, stripped

              This is my pro. file:

              TEMPLATE = app
CONFIG += console c++11
CONFIG -= app_bundle
CONFIG -= qt
SOURCES += main.cpp
INSTALLS        = target
target.files    = untitled1
target.path     = /home/pi
LIBS += -lpthread

INCLUDEPATH += /home/cristiano/FFmpeg-compiled/compiled/include

LIBS += -L/home/cristiano/FFmpeg-compiled/compiled/lib -lavcodec -lavdevice -lavutil -lavformat -lavfilter -lswscale -lswresample
              jsulmJ Offline
              jsulmJ Offline
              jsulm
              Lifetime Qt Champion
              wrote on last edited by
              #15

              @Crindu said in External libraries on Raspberry Pi 3 B+:

              /home/cristiano/FFmpeg-compiled/compiled/lib

              Are the libs really in this directory? Are they built using same compiler as you use for your app?

              https://forum.qt.io/topic/113070/qt-code-of-conduct

              C 1 Reply Last reply
              0
              • sneubertS Offline
                sneubertS Offline
                sneubert
                wrote on last edited by
                #16

                If you install for example libavcodec-dev on your rpi, the header and libraries get installed in /usr/...
                You now need the installed header and libraries on your development host. Your cross-compiler is working with a local copy of the rpi sysroot.

                Like in this guide https://wiki.qt.io/RaspberryPi2EGLFS every time you install some new dev libaries with apt-get on you rpi, you have to copy the new files to your development host.

                Take a look at Step 8.

                rsync -avz pi@raspberrypi.local:/lib sysroot
rsync -avz pi@raspberrypi.local:/usr/include sysroot/usr
rsync -avz pi@raspberrypi.local:/usr/lib sysroot/usr
rsync -avz pi@raspberrypi.local:/opt/vc sysroot/opt

                As these libaries are in the system path of your local sysroot, you can now just include headers with #include <...> and link with LIBS += -l...

                C 1 Reply Last reply
                2
                • jsulmJ jsulm

                  @Crindu said in External libraries on Raspberry Pi 3 B+:

                  /home/cristiano/FFmpeg-compiled/compiled/lib

                  Are the libs really in this directory? Are they built using same compiler as you use for your app?

                  C Offline
                  C Offline
                  Crindu
                  wrote on last edited by
                  #17

                  @jsulm Yes they are there and I built them with the cross compiler

                  1 Reply Last reply
                  0
                  • sneubertS sneubert

                    If you install for example libavcodec-dev on your rpi, the header and libraries get installed in /usr/...
                    You now need the installed header and libraries on your development host. Your cross-compiler is working with a local copy of the rpi sysroot.

                    Like in this guide https://wiki.qt.io/RaspberryPi2EGLFS every time you install some new dev libaries with apt-get on you rpi, you have to copy the new files to your development host.

                    Take a look at Step 8.

                    rsync -avz pi@raspberrypi.local:/lib sysroot
rsync -avz pi@raspberrypi.local:/usr/include sysroot/usr
rsync -avz pi@raspberrypi.local:/usr/lib sysroot/usr
rsync -avz pi@raspberrypi.local:/opt/vc sysroot/opt

                    As these libaries are in the system path of your local sysroot, you can now just include headers with #include <...> and link with LIBS += -l...

                    C Offline
                    C Offline
                    Crindu
                    wrote on last edited by
                    #18

                    @sneubert Ok thanks, something changed. Now I have a lot of compilation error relative to other libraries:

                    11:28:58: Running steps for project untitled1...
11:28:58: Configuration unchanged, skipping qmake step.
11:28:58: Starting: "/usr/bin/make" 
/home/cristiano/raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf-g++ -mfloat-abi=hard --sysroot=/home/cristiano/raspi/sysroot -Wl,-rpath-link,/home/cristiano/raspi/sysroot/opt/vc/lib -Wl,-rpath-link,/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf -Wl,-rpath-link,/home/cristiano/raspi/sysroot/lib/arm-linux-gnueabihf -o untitled1 main.o   -lavcodec -lavdevice -lavformat -lpthread 
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >::_M_create(unsigned int&, unsigned int)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libzmq.so.5: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::rfind(char, unsigned int) const@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopencv_core.so.2.4: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::find(char, unsigned int) const@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libsnappy.so.1: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_append(char const*, unsigned int)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libzmq.so.5: undefined reference to `VTT for std::__cxx11::basic_stringstream<char, std::char_traits<char>, std::allocator<char> >@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__throw_out_of_range_fmt(char const*, ...)@GLIBCXX_3.4.20'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_stringbuf<char, std::char_traits<char>, std::allocator<char> >::_M_sync(char*, unsigned int, unsigned int)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::assign(char const*)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >::_M_assign(std::__cxx11::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> > const&)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_ostringstream<char, std::char_traits<char>, std::allocator<char> >::basic_ostringstream(std::_Ios_Openmode)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/librubberband.so.2: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_mutate(unsigned int, unsigned int, char const*, unsigned int)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >::reserve(unsigned int)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_assign(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libjack.so.0: undefined reference to `operator delete(void*, unsigned int)@CXXABI_1.3.9'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libsnappy.so.1: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::resize(unsigned int, char)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::reserve(unsigned int)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::find(char const*, unsigned int, unsigned int) const@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::replace(unsigned int, unsigned int, char const*, unsigned int)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::append(char const*)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libzmq.so.5: undefined reference to `std::__cxx11::basic_stringstream<char, std::char_traits<char>, std::allocator<char> >::~basic_stringstream()@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libjack.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::compare(char const*) const@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >::_M_mutate(unsigned int, unsigned int, wchar_t const*, unsigned int)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopencv_core.so.2.4: undefined reference to `operator delete[](void*, unsigned int)@CXXABI_1.3.9'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::find_last_not_of(char const*, unsigned int, unsigned int) const@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `vtable for std::__cxx11::basic_ostringstream<char, std::char_traits<char>, std::allocator<char> >@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libjack.so.0: undefined reference to `std::runtime_error::runtime_error(char const*)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `__cxa_throw_bad_array_new_length@CXXABI_1.3.8'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&&)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `VTT for std::__cxx11::basic_istringstream<char, std::char_traits<char>, std::allocator<char> >@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_replace_aux(unsigned int, unsigned int, unsigned int, char)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::random_device::_M_init(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::runtime_error::runtime_error(char const*)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libzmq.so.5: undefined reference to `vtable for std::__cxx11::basic_stringstream<char, std::char_traits<char>, std::allocator<char> >@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_erase(unsigned int, unsigned int)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::range_error::range_error(char const*)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_construct(unsigned int, char)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_istringstream<char, std::char_traits<char>, std::allocator<char> >::~basic_istringstream()@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::find_first_of(char const*, unsigned int, unsigned int) const@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `VTT for std::__cxx11::basic_ostringstream<char, std::char_traits<char>, std::allocator<char> >@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::operator=(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&&)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `vtable for std::__cxx11::basic_istringstream<char, std::char_traits<char>, std::allocator<char> >@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::range_error::range_error(char const*)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_ostringstream<char, std::char_traits<char>, std::allocator<char> >::~basic_ostringstream()@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::find_last_of(char const*, unsigned int, unsigned int) const@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libjack.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_create(unsigned int&, unsigned int)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::find_first_not_of(char const*, unsigned int, unsigned int) const@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libjack.so.0: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_replace(unsigned int, unsigned int, char const*, unsigned int)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopencv_core.so.2.4: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::swap(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&)@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `vtable for std::__cxx11::basic_stringbuf<char, std::char_traits<char>, std::allocator<char> >@GLIBCXX_3.4.21'
/home/cristiano/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libopenmpt.so.0: undefined reference to `std::__cxx11::basic_stringbuf<char, std::char_traits<char>, std::allocator<char> >::str() const@GLIBCXX_3.4.21'
Makefile:139: recipe for target 'untitled1' failed
collect2: error: ld returned 1 exit status
make: *** [untitled1] Error 1
11:28:59: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project untitled1 (kit: Raspberry kit)
When executing step "Make"
11:28:59: Elapsed time: 00:00.
                    1 Reply Last reply
                    0
                    • sneubertS Offline
                      sneubertS Offline
                      sneubert
                      wrote on last edited by
                      #19

                      sorry you have to repeate Step 9 after rsync

                      C 1 Reply Last reply
                      0
                      • sneubertS sneubert

                        sorry you have to repeate Step 9 after rsync

                        C Offline
                        C Offline
                        Crindu
                        wrote on last edited by
                        #20

                        @sneubert I just repeated step 9 but the errors remains

                        1 Reply Last reply
                        0
                        • sneubertS Offline
                          sneubertS Offline
                          sneubert
                          wrote on last edited by
                          #21

                          this seems to be a compiler missmatch between your cross-compiler an the compiler used to create the library, one thing you can try is to put

                          #define _GLIBCXX_USE_CXX11_ABI 0

                          before include any standard library in your code

                          C 1 Reply Last reply
                          0
                          • sneubertS sneubert

                            this seems to be a compiler missmatch between your cross-compiler an the compiler used to create the library, one thing you can try is to put

                            #define _GLIBCXX_USE_CXX11_ABI 0

                            before include any standard library in your code

                            C Offline
                            C Offline
                            Crindu
                            wrote on last edited by
                            #22

                            @sneubert Unfortunately it doesn't work. I noticed that copying the file on the Raspberry and compiling from there, it works! And this is strange because the compiler should be the same as the toolchain

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                            0
                            • sneubertS Offline
                              sneubertS Offline
                              sneubert
                              wrote on last edited by
                              #23

                              what version of gcc are you using for cross compiling

                              /home/cristiano/raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf-g++ -v

                              what version of gcc is on your rpi

                              g++ -v
                              C 1 Reply Last reply
                              2
                              • sneubertS sneubert

                                what version of gcc are you using for cross compiling

                                /home/cristiano/raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf-g++ -v

                                what version of gcc is on your rpi

                                g++ -v
                                C Offline
                                C Offline
                                Crindu
                                wrote on last edited by
                                #24

                                @sneubert
                                1:

                                Using built-in specs.
COLLECT_GCC=/home/cristiano/raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf-g++
COLLECT_LTO_WRAPPER=/home/cristiano/raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/../libexec/gcc/arm-linux-gnueabihf/4.8.3/lto-wrapper
Target: arm-linux-gnueabihf
Configured with: /home/zhehe01/work/bzr/pi-build/builds/arm-linux-gnueabihf-raspbian-linux/.build/src/gcc-linaro-4.8-2014.03/configure --build=x86_64-build_unknown-linux-gnu --host=x86_64-build_unknown-linux-gnu --target=arm-linux-gnueabihf --prefix=/home/zhehe01/work/bzr/pi-build/builds/arm-linux-gnueabihf-raspbian-linux/install --with-sysroot=/home/zhehe01/work/bzr/pi-build/builds/arm-linux-gnueabihf-raspbian-linux/install/arm-linux-gnueabihf/libc --enable-languages=c,c++,fortran --disable-multilib --enable-multiarch --with-arch=armv6 --with-tune=arm1176jz-s --with-fpu=vfp --with-float=hard --with-pkgversion='crosstool-NG linaro-1.13.1+bzr2650 - Linaro GCC 2014.03' --with-bugurl=https://bugs.launchpad.net/gcc-linaro --enable-__cxa_atexit --enable-libmudflap --enable-libgomp --enable-libssp --with-gmp=/home/zhehe01/work/bzr/pi-build/builds/arm-linux-gnueabihf-raspbian-linux/.build/arm-linux-gnueabihf/build/static --with-mpfr=/home/zhehe01/work/bzr/pi-build/builds/arm-linux-gnueabihf-raspbian-linux/.build/arm-linux-gnueabihf/build/static --with-mpc=/home/zhehe01/work/bzr/pi-build/builds/arm-linux-gnueabihf-raspbian-linux/.build/arm-linux-gnueabihf/build/static --with-isl=/home/zhehe01/work/bzr/pi-build/builds/arm-linux-gnueabihf-raspbian-linux/.build/arm-linux-gnueabihf/build/static --with-cloog=/home/zhehe01/work/bzr/pi-build/builds/arm-linux-gnueabihf-raspbian-linux/.build/arm-linux-gnueabihf/build/static --with-libelf=/home/zhehe01/work/bzr/pi-build/builds/arm-linux-gnueabihf-raspbian-linux/.build/arm-linux-gnueabihf/build/static --enable-threads=posix --disable-libstdcxx-pch --enable-linker-build-id --enable-plugin --enable-gold --with-local-prefix=/home/zhehe01/work/bzr/pi-build/builds/arm-linux-gnueabihf-raspbian-linux/install/arm-linux-gnueabihf/libc --enable-c99 --enable-long-long --with-float=hard
Thread model: posix
gcc version 4.8.3 20140303 (prerelease) (crosstool-NG linaro-1.13.1+bzr2650 - Linaro GCC 2014.03)

                                2:

                                Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-linux-gnueabihf/6/lto-wrapper
Target: arm-linux-gnueabihf
Configured with: ../src/configure -v --with-pkgversion='Raspbian 6.3.0-18+rpi1+deb9u1' --with-bugurl=file:///usr/share/doc/gcc-6/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-6 --program-prefix=arm-linux-gnueabihf- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libitm --disable-libquadmath --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-6-armhf/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-6-armhf --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-6-armhf --with-arch-directory=arm --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --with-target-system-zlib --enable-objc-gc=auto --enable-multiarch --disable-sjlj-exceptions --with-arch=armv6 --with-fpu=vfp --with-float=hard --enable-checking=release --build=arm-linux-gnueabihf --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf
Thread model: posix
gcc version 6.3.0 20170516 (Raspbian 6.3.0-18+rpi1+deb9u1)

                                I think I need to update the cross compiler. Can I simply download the same version of the Raspberry and set it as compiler in the Qt Creator kit?

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                                0
                                • sneubertS Offline
                                  sneubertS Offline
                                  sneubert
                                  wrote on last edited by
                                  #25

                                  I always use the linaro cross-compiler, latest gcc 7.3.1 should do
                                  https://releases.linaro.org/components/toolchain/binaries/latest/arm-linux-gnueabihf/
                                  But I think you have to rebuild qt with this compiler.

                                  C 2 Replies Last reply
                                  3
                                  • sneubertS sneubert

                                    I always use the linaro cross-compiler, latest gcc 7.3.1 should do
                                    https://releases.linaro.org/components/toolchain/binaries/latest/arm-linux-gnueabihf/
                                    But I think you have to rebuild qt with this compiler.

                                    C Offline
                                    C Offline
                                    Crindu
                                    wrote on last edited by
                                    #26

                                    @sneubert Ok I'll try to repeat steps 10 and 11 with the latest version of gcc

                                    1 Reply Last reply
                                    0
                                    • sneubertS sneubert

                                      I always use the linaro cross-compiler, latest gcc 7.3.1 should do
                                      https://releases.linaro.org/components/toolchain/binaries/latest/arm-linux-gnueabihf/
                                      But I think you have to rebuild qt with this compiler.

                                      C Offline
                                      C Offline
                                      Crindu
                                      wrote on last edited by
                                      #27

                                      @sneubert It worked at first try! Thank you so much, you really helped me a lot!!

                                      H 1 Reply Last reply
                                      1
                                      • C Crindu

                                        @sneubert It worked at first try! Thank you so much, you really helped me a lot!!

                                        H Offline
                                        H Offline
                                        Huy hust
                                        wrote on last edited by
                                        #28

                                        @Crindu Dear, I am facing with problem that same with your. But i dont know how to update gcc in cross compile, can you help me?

                                        1 Reply Last reply
                                        0

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