Beaglebone Cross Compile

[ununez]

Ok, I executed the commands

ln -sf ./lib/arm-linux-gnueabihf/librt.so.1 ./usr/lib/arm-linux-gnueabihf/librt.so
ln -sf ./lib/arm-linux-gnueabihf/libdl.so.2 ./usr/lib/arm-linux-gnueabihf/libdl.so
ln -sf ./lib/arm-linux-gnueabihf/libglib-2.0.so.0 ./usr/lib/arm-linux-gnueabihf/libglib-2.0.so
ln -sf ./lib/arm-linux-gnueabihf/libm.so.6 ./usr/lib/arm-linux-gnueabihf/libm.so

and I passed to the second error from the post of the link above, so I'd really appreciate an advice because it seems the sysroot is not being notice at all.

Should I have the image mounted on my host? is there any problem to take it from the sd card directly?

[jsulm]

@ununez said in Beaglebone Cross Compile:

Should I have the image mounted on my host? is there any problem to take it from the sd card directly?

Both should work.

[ununez]

@jsulm Thanks for your reply!, obviously I'm missing something or I forgot to install something, but I cannot find what could it be, on the config log I found some errors like this:

+ cd /home/nt/opt/bbbqt5/qtbuild/config.tests/c++1z && /home/nt/opt/bbbqt5/qtbuild/qtbase/bin/qmake "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared warn_off console single_arch" "QMAKE_CFLAGS += --sysroot=/run/media/nt/rootfs" "QMAKE_CXXFLAGS += --sysroot=/run/media/nt/rootfs" "QMAKE_LFLAGS += --sysroot=/run/media/nt/rootfs" -early "CONFIG += cross_compile" /home/nt/opt/bbbqt5/qtbuild/config.tests/c++1z
+ cd /home/nt/opt/bbbqt5/qtbuild/config.tests/c++1z && MAKEFLAGS= /bin/gmake
> /home/nt/opt/arm-toolchain/gcc-linaro-6.3.1-2017.05-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-g++ -c -pipe -march=armv7-a -mtune=cortex-a8 -mfpu=neon -mthumb -march=armv7-a -mtune=cortex-a8 -mfpu=neon -mthumb -mfloat-abi=hard --sysroot=/run/media/nt/rootfs -O2 -O3 -std=gnu++1z -w -fPIC  -I. -I/home/nt/opt/bbbqt5/qt-everywhere-src-5.12.9/qtbase/mkspecs/devices/linux-beagleboard-g++ -o main.o main.cpp
> main.cpp:8:19: fatal error: variant: No such file or directory
>  #include <variant>
>                    ^
> compilation terminated.
> Makefile:175: recipe for target 'main.o' failed
> gmake: *** [main.o] Error 1
test config.qtbase.tests.c++1z FAILED

or for the opengl i think it has to do with this message:

> /home/nt/opt/arm-toolchain/gcc-linaro-6.3.1-2017.05-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-g++ -c -pipe -march=armv7-a -mtune=cortex-a8 -mfpu=neon -mthumb -march=armv7-a -mtune=cortex-a8 -mfpu=neon -mthumb -mfloat-abi=hard --sysroot=/run/media/nt/rootfs --sysroot=/run/media/nt/rootfs -O2 -O3 -w -fPIC  -I. -isystem /run/media/nt/rootfs/usr/include/GL -I/home/nt/opt/bbbqt5/qt-everywhere-src-5.12.9/qtbase/mkspecs/devices/linux-beagleboard-g++ -o main.o main.cpp
> /home/nt/opt/arm-toolchain/gcc-linaro-6.3.1-2017.05-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-g++ -Wl,-rpath-link,/run/media/nt/rootfs/lib/arm-linux-gnueabihf -mfloat-abi=hard --sysroot=/run/media/nt/rootfs --sysroot=/run/media/nt/rootfs -Wl,-O1 -o opengl_es2 main.o   /run/media/nt/rootfs/usr/lib/arm-linux-gnueabihf/libGLESv2.so  -lrt -lpthread -ldl 
> /home/nt/opt/arm-toolchain/gcc-linaro-6.3.1-2017.05-x86_64_arm-linux-gnueabihf/bin/../lib/gcc/arm-linux-gnueabihf/6.3.1/../../../../arm-linux-gnueabihf/bin/ld: warning: libGLdispatch.so.0, needed by /run/media/nt/rootfs/usr/lib/arm-linux-gnueabihf/libGLESv2.so, not found (try using -rpath or -rpath-link)
> /run/media/nt/rootfs/usr/lib/arm-linux-gnueabihf/libGLESv2.so: undefined reference to `__glDispatchRegisterStubCallbacks'
> /run/media/nt/rootfs/usr/lib/arm-linux-gnueabihf/libGLESv2.so: undefined reference to `__glDispatchFini'
> /run/media/nt/rootfs/usr/lib/arm-linux-gnueabihf/libGLESv2.so: undefined reference to `__glDispatchUnregisterStubCallbacks'
> /run/media/nt/rootfs/usr/lib/arm-linux-gnueabihf/libGLESv2.so: undefined reference to `_glapi_tls_Current'
> /run/media/nt/rootfs/usr/lib/arm-linux-gnueabihf/libGLESv2.so: undefined reference to `__glDispatchInit'
> collect2: error: ld returned 1 exit status
> Makefile:67: recipe for target 'opengl_es2' failed
> gmake: *** [opengl_es2] Error 1
 => source failed verification.

you can find the complete log file on this link

[jsulm]

@ununez said in Beaglebone Cross Compile:

on the config log I found some errors like this

These errors are not necessarily a problem.
config.qtbase.tests.c++1z for example tests whether the compiler supports C++17 which is not mandatory. In your case the compiler does not support C++17.
You should check the configure summary to see whether everything you need is activated.

"'opengl_es2' failed" - if you need OpenGL ES then check whether needed libs are installed (see "warning: libGLdispatch.so.0, needed by /run/media/nt/rootfs/usr/lib/arm-linux-gnueabihf/libGLESv2.so" from the log).

[ununez]

@jsulm By config summary, do you mean the beagleboard qmake.conf file?

and for the libGLDispatch.so.0, I have it on the sysroot, let me take a look if I need to configure something else.

[jsulm]

@ununez said in Beaglebone Cross Compile:

By config summary, do you mean the beagleboard qmake.conf file?

No, I mean the output from configure when it finishes.

[ununez]

@jsulm

I'm looking into this if you have an advice please let me know:

Configure summary:

Building on: linux-g++ (x86_64, CPU features: mmx sse sse2)
Building for: devices/linux-beagleboard-g++ (arm, CPU features: neon)
Target compiler: gcc 6.3.1
Configuration: cross_compile compile_examples enable_new_dtags largefile neon precompile_header shared rpath release c++11 c++14 concurrent dbus reduce_exports stl
Build options:
  Mode ................................... release
  Optimize release build for size ........ no
  Building shared libraries .............. yes
  Using C standard ....................... C11
  Using C++ standard ..................... C++14
  Using ccache ........................... no
  Using gold linker ...................... no
  Using new DTAGS ........................ yes
  Using precompiled headers .............. yes
  Using LTCG ............................. no
  Target compiler supports:
    NEON ................................. yes
  Build parts ............................ libs
Qt modules and options:
  Qt Concurrent .......................... yes
  Qt D-Bus ............................... yes
  Qt D-Bus directly linked to libdbus .... no
  Qt Gui ................................. yes
  Qt Network ............................. yes
  Qt Sql ................................. yes
  Qt Testlib ............................. yes
  Qt Widgets ............................. yes
  Qt Xml ................................. yes
Support enabled for:
  Using pkg-config ....................... yes
  udev ................................... no
  Using system zlib ...................... no
Qt Core:
  DoubleConversion ....................... yes
    Using system DoubleConversion ........ no
  GLib ................................... no
  iconv .................................. no
  ICU .................................... yes
  Tracing backend ........................ <none>
  Logging backends:
    journald ............................. no
    syslog ............................... no
    slog2 ................................ no
  Using system PCRE2 ..................... no
Qt Network:
  getifaddrs() ........................... yes
  IPv6 ifname ............................ yes
  libproxy ............................... no
  Linux AF_NETLINK ....................... yes
  OpenSSL ................................ yes
    Qt directly linked to OpenSSL ........ no
  OpenSSL 1.1 ............................ yes
  DTLS ................................... yes
  SCTP ................................... no
  Use system proxies ..................... yes
Qt Gui:
  Accessibility .......................... yes
  FreeType ............................... yes
    Using system FreeType ................ no
  HarfBuzz ............................... yes
    Using system HarfBuzz ................ no
  Fontconfig ............................. no
  Image formats:
    GIF .................................. yes
    ICO .................................. yes
    JPEG ................................. yes
      Using system libjpeg ............... no
    PNG .................................. yes
      Using system libpng ................ no
  EGL .................................... no
  OpenVG ................................. no
  OpenGL:
    Desktop OpenGL ....................... no
    OpenGL ES 2.0 ........................ no
    OpenGL ES 3.0 ........................ no
    OpenGL ES 3.1 ........................ no
    OpenGL ES 3.2 ........................ no
  Vulkan ................................. no
  Session Management ..................... yes
Features used by QPA backends:
  evdev .................................. yes
  libinput ............................... no
  INTEGRITY HID .......................... no
  mtdev .................................. no
  tslib .................................. no
  xkbcommon .............................. no
  X11 specific:
    XLib ................................. no
    XCB Xlib ............................. no
    EGL on X11 ........................... no
QPA backends:
  DirectFB ............................... no
  EGLFS .................................. no
  LinuxFB ................................ yes
  VNC .................................... yes
  Mir client ............................. no
Qt Sql:
  SQL item models ........................ yes
Qt Widgets:
  GTK+ ................................... no
  Styles ................................. Fusion Windows
Qt PrintSupport:
  CUPS ................................... no
Qt Sql Drivers:
  DB2 (IBM) .............................. no
  InterBase .............................. no
  MySql .................................. no
  OCI (Oracle) ........................... no
  ODBC ................................... no
  PostgreSQL ............................. no
  SQLite2 ................................ no
  SQLite ................................. yes
    Using system provided SQLite ......... no
  TDS (Sybase) ........................... no
Qt Testlib:
  Tester for item models ................. yes
Qt SerialBus:
  Socket CAN ............................. yes
  Socket CAN FD .......................... yes
Further Image Formats:
  JasPer ................................. no
  MNG .................................... no
  TIFF ................................... yes
    Using system libtiff ................. no
  WEBP ................................... yes
    Using system libwebp ................. no
Qt QML:
  QML network support .................... yes
  QML debugging and profiling support .... yes
  QML sequence object .................... yes
  QML list model ......................... yes
  QML XML http request ................... yes
  QML Locale ............................. yes
  QML delegate model ..................... yes
Qt Quick:
  Direct3D 12 ............................ no
  AnimatedImage item ..................... yes
  Canvas item ............................ yes
  Support for Qt Quick Designer .......... yes
  Flipable item .......................... yes
  GridView item .......................... yes
  ListView item .......................... yes
  TableView item ......................... yes
  Path support ........................... yes
  PathView item .......................... yes
  Positioner items ....................... yes
  Repeater item .......................... yes
  ShaderEffect item ...................... yes
  Sprite item ............................ yes
Qt Scxml:
  ECMAScript data model for QtScxml ...... yes
Qt Gamepad:
  SDL2 ................................... no
Qt 3D GeometryLoaders:
  Autodesk FBX ........................... no
Qt Wayland Client ........................ no
Qt Wayland Compositor .................... no
Qt Bluetooth:
  BlueZ .................................. no
  BlueZ Low Energy ....................... no
  Linux Crypto API ....................... no
  WinRT Bluetooth API (desktop & UWP) .... no
Qt Sensors:
  sensorfw ............................... no
Qt Quick Controls 2:
  Styles ................................. Default Fusion Imagine Material Universal
Qt Quick Templates 2:
  Hover support .......................... yes
  Multi-touch support .................... yes
Qt Positioning:
  Gypsy GPS Daemon ....................... no
  WinRT Geolocation API .................. no
Qt Location:
  Qt.labs.location experimental QML plugin . yes
  Geoservice plugins:
    OpenStreetMap ........................ yes
    HERE ................................. yes
    Esri ................................. yes
    Mapbox ............................... yes
    MapboxGL ............................. no
    Itemsoverlay ......................... yes
QtXmlPatterns:
  XML schema support ..................... yes
Qt Multimedia:
  ALSA ................................... no
  GStreamer 1.0 .......................... no
  GStreamer 0.10 ......................... no
  Video for Linux ........................ yes
  OpenAL ................................. no
  PulseAudio ............................. no
  Resource Policy (libresourceqt5) ....... no
  Windows Audio Services ................. no
  DirectShow ............................. no
  Windows Media Foundation ............... no
Qt Tools:
  QDoc ................................... no
Qt WebEngine:
  Embedded build ......................... yes
  Full debug information ................. no
  Pepper Plugins ......................... no
  Printing and PDF ....................... no
  Proprietary Codecs ..................... no
  Spellchecker ........................... yes
  Native Spellchecker .................... no
  WebRTC ................................. no
  Use System Ninja ....................... no
  Geolocation ............................ yes
  WebChannel support ..................... yes
  Use v8 snapshot ........................ yes
  Kerberos Authentication ................ no
  Support qpa-xcb ........................ no
  Building v8 snapshot supported ......... yes
  Use ALSA ............................... no
  Use PulseAudio ......................... no
  Optional system libraries used:
    re2 .................................. no
    icu .................................. no
    libwebp, libwebpmux and libwebpdemux . no
    opus ................................. no
    ffmpeg ............................... no
    libvpx ............................... no
    snappy ............................... no
    glib ................................. no
    zlib ................................. no
    minizip .............................. no
    libevent ............................. no
    jsoncpp .............................. no
    protobuf ............................. no
    libxml2 and libxslt .................. no
    lcms2 ................................ no
    png .................................. no
    JPEG ................................. no
    harfbuzz ............................. no
    freetype ............................. no
  Required system libraries:
    fontconfig ........................... no
    dbus ................................. no
    nss .................................. no
    khr .................................. yes
    glibc ................................ yes
  Required system libraries for qpa-xcb:
    x11 .................................. yes
    libdrm ............................... yes
    xcomposite ........................... no
    xcursor .............................. no
    xi ................................... no
    xtst ................................. no

Note: Also available for Linux: linux-clang linux-icc

Note: -libdir is not a subdirectory of -prefix.

Note: PKG_CONFIG_LIBDIR automatically set to /run/media/nt/rootfs/usr/lib/pkgconfig:/run/media/nt/rootfs/usr/share/pkgconfig:/run/media/nt/rootfs/usr/lib/arm-linux-gnueabihf/pkgconfig

Note: PKG_CONFIG_SYSROOT_DIR automatically set to /run/media/nt/rootfs

Note: The following modules are not being compiled in this configuration:
    3dcore
    3drender

WARNING: QDoc will not be compiled, probably because libclang could not be located. This means that you cannot build the Qt documentation.

Either ensure that llvm-config is in your PATH environment variable, or set LLVM_INSTALL_DIR to the location of your llvm installation.
On Linux systems, you may be able to install libclang by installing the libclang-dev or libclang-devel package, depending on your distribution.
On macOS, you can use Homebrew's llvm package.
On Windows, you must set LLVM_INSTALL_DIR to the installation path.

WARNING: gperf is required to build QtWebEngine.

ERROR: Feature 'opengles2' was enabled, but the pre-condition 'config.win32 || (!config.watchos && !features.opengl-desktop && libs.opengl_es2)' failed.

ERROR: The OpenGL functionality tests failed!
You might need to modify the include and library search paths by editing QMAKE_INCDIR_OPENGL[_ES2],
QMAKE_LIBDIR_OPENGL[_ES2] and QMAKE_LIBS_OPENGL[_ES2] in the mkspec for your platform.
[nt@localhost qtbuild]$ 

[jsulm]

@ununez Well, you should know what you need and then check whether it is activated (yes) or not (no)

[ununez]

@jsulm
Well, I guess i was able to add opengl availability and mark solved this topic, Thanks!

The solution was I missed to set up the platform parameter which apparently it has to be linux-g++-64 and remove the no-use-gold-linker

I'll let you know if something appears during the make execution.

[SardorBuriev]

@ununez try this https://sysprogs.com/w/fixing-rpath-link-issues-with-cross-compilers/. I had the same problem. Don't use gold linker. This is my configure: /opt/qt5pi/qt-everywhere-src-5.11.3/configure -opengl es2 -device buildroot -device-option CROSS_COMPILE=/opt/qt5pi/gcc-linaro-7.5.0-2019.12-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf- -sysroot /opt/qt5pi/sysroot -prefix /usr/local/qt5pi -confirm-license -opensource -skip qtscript -skip wayland -skip qtwebengine -skip qtdatavis3d -nomake examples -make libs -pkg-config -no-use-gold-linker -v. Creat a folder called etc in sysroot(for expamle, /opt/qt5pi/sysroot/etc/ld.so.conf ). My ld.so.conf: /usr/local/lib/arm-linux-gnueabihf
/lib/arm-linux-gnueabihf
/usr/lib/arm-linux-gnueabihf

/usr/local/lib

Just see the site the above

My target device is Armbian Buster with Linux 5.3.9-sunxi and host computer ubuntu(Distributor ID: Ubuntu
Description: Ubuntu 16.04.7 LTS
Release: 16.04
Codename: xenial
)