How to build Qt for Raspberry Pi3

sly110

@aktay
Thank you for the advice. I have followed this document MANY times and only once did I get 5.7 to compile for RPi2. But it does not have webView or virtual keyboard which I need. My goal is to follow the document using RPi3 and Qt5.8 everywhere BUT to date regardless of what I try it ALWAYS fails. Usually for different reasons. The latest is wont build webEngine. I have followed MANY other docs as well in which people were successful and my builds still fail.
I will keep trying. Thank you.

aktay

@sly110 said in How to build Qt for Raspberry Pi3:

I will keep trying. Thank you.

Did you follow the instructions below? I tried and it works for Qt 5.8.
[https://github.com/Kukkimonsuta/rpi-buildqt])

oniongarlic

@sly110 said in How to build Qt for Raspberry Pi3:

webView

The problem with the web components is that compiling it takes a lot of memory that the Pi just don't have.

sly110

@aktay
Thank you! This is an amazing link.

I still have problem building webView (as it needs web engine) which will not build

File "/home/syoung/raspi/src/qtwebengine/src/3rdparty/chromium/third_party/WebKit/Source/build/scripts/in_generator.py", line 108, in main
writer.write_files(options.output_dir)
File "/home/syoung/raspi/src/qtwebengine/src/3rdparty/chromium/third_party/WebKit/Source/build/scripts/in_generator.py", line 60, in write_files
self._write_file_if_changed(output_dir, generator(), file_name)
File "../../3rdparty/chromium/third_party/WebKit/Source/build/scripts/make_css_property_names.py", line 233, in generate_implementation
gperf = subprocess.Popen(gperf_args, stdin=subprocess.PIPE, stdout=subprocess.PIPE, universal_newlines=True)
File "/usr/lib/python2.7/subprocess.py", line 711, in init
errread, errwrite)
File "/usr/lib/python2.7/subprocess.py", line 1343, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory
ninja: build stopped: subcommand failed.
Makefile.gn_run:343: recipe for target 'run_ninja' failed
make[3]: *** [run_ninja] Error 1
make[3]: Leaving directory '/home/syoung/raspi/src/qtwebengine/src/core'
Makefile:78: recipe for target 'sub-gn_run-pro-make_first' failed
make[2]: *** [sub-gn_run-pro-make_first] Error 2
make[2]: Leaving directory '/home/syoung/raspi/src/qtwebengine/src/core'
Makefile:75: recipe for target 'sub-core-make_first' failed
make[1]: *** [sub-core-make_first] Error 2
make[1]: Leaving directory '/home/syoung/raspi/src/qtwebengine/src'
Makefile:44: recipe for target 'sub-src-make_first' failed
make: *** [sub-src-make_first] Error 2

aktay

@sly110
You can try to recompile the module.

sudo git clone http://code.qt.io/qt/qtwebengine -b 5.8
cd qtwebengine
sudo ~/raspi/build/qt5.8-host/bin/qmake -r // If I'm not mistaken, it is correct path.check it please.
sudo make -r
sudo make install -r

Good luck.

sneubert

@sly110
did you install gperf? It´s needed to build WebEngine.

sly110

@sneubert

Hi yes I installed these on the Pi in addition to the packages listed in
https://github.com/Kukkimonsuta/rpi-buildqt
RPi Install ninja on Rpi & resync
Rpi Install ruby on Rpi & resync
Rpi Installed Libxss
Rpi Installed Ninja-build
RPI installed gperf

when I build per aktay's recommendation I get an error in qmake step:

using python: /usr/bin/python version: 2.7.12
Using extra options found in /home/syoung/raspi/src/qtwebengine/src/core/qmake_extras.gypi
Using extra options found in /home/syoung/raspi/src/qtwebengine/src/core/qtwebengine_extras.gypi
Using extra options found in /home/syoung/raspi/src/qtwebengine/src/core/qmake_extras.gypi
Using extra options found in /home/syoung/raspi/src/qtwebengine/src/core/qtwebengine_extras.gypi
Updating projects from gyp files...
gyp: name 'arm_thumb' is not defined while evaluating condition 'arm_thumb==1' in /home/syoung/raspi/src/qtwebengine/src/core/resources/resources.gyp
gyp: name 'arm_thumb' is not defined while evaluating condition 'arm_thumb==1' in /home/syoung/raspi/src/qtwebengine/src/core/core_generated.gyp
Project ERROR: -- running gyp_qtwebengine failed --

FYI: This is the config summary from the qmake step from aktay:

//Configure summary:

Qt WebEngine:
  Proprietary Codecs ..................... no
  Spellchecker ........................... yes
  ALSA ................................... yes
  PulseAudio ............................. yes

Qt is now configured for building. Just run 'make'.
Once everything is built, Qt is installed.
You should NOT run 'make install'.
Note that this build cannot be deployed to other machines or devices``

Thanks to everyone.

aktay

@sly110
Can you share the error and the operation you are doing?

sly110

@aktay

I am following your reply exactly:

in src directory:
sudo git clone http://code.qt.io/qt/qtwebengine -b 5.8
cd qtwebengine
sudo ~/raspi/build/qt5.8-host/bin/qmake -r
//fails so:
Sudo git submodule update --init
//retry
sudo ~/raspi/build/qt5.8-host/bin/qmake -r

//young@Ubuntu16-VM:~/raspi/src/qtwebengine$ sudo git submodule update --init
Submodule 'src/3rdparty' (http://code.qt.io/qt/qtwebengine-chromium.git) registered for path 'src/3rdparty'
Cloning into 'src/3rdparty'...
remote: Counting objects: 477672, done.
remote: Compressing objects: 100% (372217/372217), done.
remote: Total 477672 (delta 294694), reused 168949 (delta 97583)
Receiving objects: 100% (477672/477672), 797.76 MiB | 3.47 MiB/s, done.
Resolving deltas: 100% (294694/294694), done.
Checking connectivity... done.
Submodule path 'src/3rdparty': checked out '675c165d44ac5d39e9b37263e561dc1673f3bfa4'
syoung@Ubuntu16-VM:~/raspi/src/qtwebengine$ sudo ~/raspi/build/qt5.8-host/bin/qmake -r
[sudo] password for syoung: 

Running configuration tests...
Done running configuration tests.

Configure summary:

Qt WebEngine:
  Proprietary Codecs ..................... no
  Spellchecker ........................... yes
  ALSA ................................... yes
  PulseAudio ............................. yes

Qt is now configured for building. Just run 'make'.
Once everything is built, Qt is installed.
You should NOT run 'make install'.
Note that this build cannot be deployed to other machines or devices.

Prior to reconfiguration, make sure you remove any leftovers from
the previous build.

Running configure tests
Checking for alsa... yes
Checking for khr... yes
Checking for libvpx... no
Checking for snappy... no
Checking for srtp... no
Project MESSAGE: PKG_CONFIG_LIBDIR automatically set to /home/syoung/raspi/sysroot/usr/lib/pkgconfig:/home/syoung/raspi/sysroot/usr/share/pkgconfig:/home/syoung/raspi/sysroot/usr/lib/arm-linux-gnueabihf/pkgconfig
Project MESSAGE: PKG_CONFIG_SYSROOT_DIR automatically set to /home/syoung/raspi/sysroot
System zlib or minizip not found. Using Chromium's copies.
System libwebp or libwebpdemux not found. Using Chromium's copies.
System libevent not found. Using Chromium's copy.
System jsoncpp not found. Using Chromium's copy.
System opus not found. Using Chromium's copy.
System protobuf not found. Using Chromium's copy.
Compatible system libvpx not found. Using Chromium's copy.
System libsrtp not found. Using Chromium's copy.
System snappy not found. Using Chromium's copy.
System library dependencies:
  ICU ................................ Using internal copy (Default, force system ICU with WEBENGINE_CONFIG+=use_system_icu)
  FFMPEG ............................. Using internal copy (Default, force system FFMPEG with WEBENGINE_CONFIG+=use_system_ffmpeg)
  Optional system libraries used ..... libxslt libxml2
  Optional bundled libraries used .... libevent jsoncpp opus protobuf libvpx srtp snappy icu ffmpeg
Configurable features:
  Proprietary codecs (H264, MP3) ..... Not enabled         (Default, enable with WEBENGINE_CONFIG+=use_proprietary_codecs)
  Geolocation ........................ Not enabled         (Requires Qt Positioning module)
  Certificate handling ............... Using bundled BoringSSL
Reading /home/syoung/raspi/src/qtwebengine/src/src.pro
 Reading /home/syoung/raspi/src/qtwebengine/src/core/core.pro
  Reading /home/syoung/raspi/src/qtwebengine/src/core/core_headers.pro
Project MESSAGE: perl -w /home/syoung/raspi/build/qt5.8-host/bin/syncqt.pl -module QtWebEngineCore -version 5.8.1 -outdir /home/syoung/raspi/src/qtwebengine /home/syoung/raspi/src/qtwebengine
<srcbase> = /home/syoung/raspi/src/qtwebengine 
<outbase> = /home/syoung/raspi/src/qtwebengine 
QtWebEngineCore: created fwd-include header(s) for <srcbase>/src/core/api/ { qtwebenginecoreglobal.h (1), qtwebenginecoreglobal_p.h (1), qwebenginecallback.h (2), qwebenginecallback_p.h (1), qwebenginecookiestore.h (2), qwebenginecookiestore_p.h (1), qwebengineurlrequestinfo.h (2), qwebengineurlrequestinfo_p.h (1), qwebengineurlrequestinterceptor.h (2), qwebengineurlrequestjob.h (2), qwebengineurlschemehandler.h (2) }
QtWebEngineCore: created version header
QtWebEngineCore: created master header
QtWebEngineCore: created headers.pri file
  Reading /home/syoung/raspi/src/qtwebengine/src/core/core_gyp_generator.pro
  Reading /home/syoung/raspi/src/qtwebengine/src/core/gyp_configure_host.pro
  Reading /home/syoung/raspi/src/qtwebengine/src/core/gyp_configure_target.pro
  Reading /home/syoung/raspi/src/qtwebengine/src/core/gyp_run.pro
Project MESSAGE: PKG_CONFIG_LIBDIR automatically set to /home/syoung/raspi/sysroot/usr/lib/pkgconfig:/home/syoung/raspi/sysroot/usr/share/pkgconfig:/home/syoung/raspi/sysroot/usr/lib/arm-linux-gnueabihf/pkgconfig
Project MESSAGE: PKG_CONFIG_SYSROOT_DIR automatically set to /home/syoung/raspi/sysroot
Project MESSAGE: Running gyp_qtwebengine "/home/syoung/raspi/src/qtwebengine/src/core" -D qt_cross_compile=1 -D os_posix=1 -D qt_os="embedded_linux" -I config/embedded_linux.gypi -D pkg-config="/home/syoung/raspi/src/qtwebengine/src/core/pkg-config_wrapper.sh 2> /dev/null" -D use_qt=1 -D v8_use_external_startup_data=0 -D enable_web_speech=0 -D enable_extensions=0 -D linux_use_bundled_gold=0 -D linux_use_bundled_binutils=0 -D linux_use_gold_flags=0 -D toolkit_uses_gtk=0 -D use_ash=0 -D use_aura=1 -D use_cairo=0 -D use_clipboard_aurax11=0 -D use_cups=0 -D use_gconf=0 -D use_gio=0 -D use_gnome_keyring=0 -D use_kerberos=0 -D use_pango=0 -D use_openssl=1 -D use_allocator=none -D use_experimental_allocator_shim=0 -D use_nss_certs=0 -D use_nss_verifier=0 -D use_openssl_certs=1 -D use_system_libpng=1 -D use_system_libjpeg=1 -D use_pulseaudio=1 -D use_alsa=1 -D use_system_libxml=1 -D clang=0 -D desktop_linux=0 -D disable_nacl=1 -D embedded=1 -D enable_autofill_dialog=0 -D enable_automation=0 -D enable_basic_printing=0 -D enable_captive_portal_detection=0 -D enable_extensions=0 -D enable_google_now=0 -D enable_language_detection=0 -D enable_managed_users=0 -D enable_pdf=0 -D enable_plugin_installation=0 -D enable_plugins=0 -D enable_print_preview=0 -D enable_session_service=0 -D enable_task_manager=0 -D enable_themes=0 -D enable_webrtc=0 -D gtest_target_type=none -D host_clang=0 -D notifications=0 -D ozone_auto_platforms=0 -D ozone_platform_dri=0 -D ozone_platform_test=0 -D p2p_apis=0 -D safe_browsing=0 -D toolkit_views=1 -D use_custom_freetype=0 -D use_libpci=0 -D use_ozone=1 -D use_system_fontconfig=1 -D use_x11=0 -D v8_use_snapshot=false -D want_separate_host_toolset=1 -D angle_enable_gl=0  -D qtwe_process_name_debug=QtWebEngineProcess -D qtwe_process_name_release=QtWebEngineProcess -D disable_glibcxx_debug=1 -D remove_webcore_debug_symbols=1 -D remove_v8base_debug_symbols=1 -D disable_fatal_linker_warnings=1 -D sysroot="/home/syoung/raspi/sysroot" -D CXX="/home/syoung/raspi/tools/arm-bcm2708/arm-rpi-4.9.3-linux-gnueabihf/bin/arm-linux-gnueabihf-g++" -D target_arch=arm -D arm_arch="armv8-a" -D arm_tune="cortex-a53" -D arm_float_abi="hard" -D arm_version="8" -D arm_fpu="crypto-neon-fp-armv8" -D arm_neon=1 -D release_optimize=s -D debug_optimize=s -D win_release_Optimization=1 -D release_unwind_tables=0 -D enable_spellcheck=1.
using python: /usr/bin/python version: 2.7.12
Using extra options found in /home/syoung/raspi/src/qtwebengine/src/core/qmake_extras.gypi
Using extra options found in /home/syoung/raspi/src/qtwebengine/src/core/qtwebengine_extras.gypi
Using extra options found in /home/syoung/raspi/src/qtwebengine/src/core/qmake_extras.gypi
Using extra options found in /home/syoung/raspi/src/qtwebengine/src/core/qtwebengine_extras.gypi
Updating projects from gyp files...
gyp: name 'arm_thumb' is not defined while evaluating condition 'arm_thumb==1' in /home/syoung/raspi/src/qtwebengine/src/core/resources/resources.gyp
gyp: name 'arm_thumb' is not defined while evaluating condition 'arm_thumb==1' in /home/syoung/raspi/src/qtwebengine/src/core/core_generated.gyp
Project ERROR: -- running gyp_qtwebengine failed --
``

aktay

@sly110 said in How to build Qt for Raspberry Pi3:

sudo git clone http://code.qt.io/qt/qtwebengine -b 5.8

Are you sure git is installed? Try this, please.

sudo apt-get install git
sudo git clone http://code.qt.io/qt/qtwebengine -b 5.8
cd qtwebengine
sudo ~/raspi/build/qt5.8-host/bin/qmake -r
sudo make -r
sudo make install -r

Will you share the output of the following commands with me?

sudo git clone http://code.qt.io/qt/qtwebengine -b 5.8
sudo ~/raspi/build/qt5.8-host/bin/qmake -r
sudo make -r

sly110

@aktay
1st of all - thank you so much for your help!

git is definitely installed on host but was not installed on Pi. Installed & sync with 2_sync.sh.

on host:

//syoung@Ubuntu16-VM:~/raspi/src$ sudo git clone http://code.qt.io/qt/qtwebengine -b 5.8
Cloning into 'qtwebengine'...
remote: Counting objects: 28483, done.
remote: Compressing objects: 100% (20287/20287), done.
remote: Total 28483 (delta 21000), reused 10717 (delta 7667)
Receiving objects: 100% (28483/28483), 7.77 MiB | 1.56 MiB/s, done.
Resolving deltas: 100% (21000/21000), done.
Checking connectivity... done.
``


syoung@Ubuntu16-VM:~/raspi/src$ cd qtwebengine/
syoung@Ubuntu16-VM:~/raspi/src/qtwebengine$ sudo ~/raspi/build/qt5.8-host/bin/qmake -r
Info: creating stash file /home/syoung/raspi/src/qtwebengine/.qmake.stash
Info: creating cache file /home/syoung/raspi/src/qtwebengine/.qmake.cache

Running configuration tests...
Checking for ALSA... yes
Checking for PulseAudio >= 0.9.10... yes
Done running configuration tests.

Configure summary:

Qt WebEngine:
  Proprietary Codecs ..................... no
  Spellchecker ........................... yes
  ALSA ................................... yes
  PulseAudio ............................. yes

Qt is now configured for building. Just run 'make'.
Once everything is built, Qt is installed.
You should NOT run 'make install'.
Note that this build cannot be deployed to other machines or devices.

Prior to reconfiguration, make sure you remove any leftovers from
the previous build.

Project ERROR: Submodule qtwebengine-chromium does not exist. Run 'git submodule update --init'.
syoung@Ubuntu16-VM:~/raspi/src/qtwebengine$

sudo git submodule update --init
...
syoung@Ubuntu16-VM:~/raspi/src/qtwebengine$ sudo git submodule update --init
Submodule 'src/3rdparty' (http://code.qt.io/qt/qtwebengine-chromium.git) registered for path 'src/3rdparty'
Cloning into 'src/3rdparty'...
remote: Counting objects: 477672, done.
remote: Compressing objects: 100% (372217/372217), done.
remote: Total 477672 (delta 294696), reused 168949 (delta 97583)
Receiving objects: 100% (477672/477672), 797.69 MiB | 4.51 MiB/s, done.
Resolving deltas: 100% (294696/294696), done.
Checking connectivity... done.
Submodule path 'src/3rdparty': checked out '675c165d44ac5d39e9b37263e561dc1673f3bfa4'
syoung@Ubuntu16-VM:~/raspi/src/qtwebengine$

syoung@Ubuntu16-VM:~/raspi/src/qtwebengine$ sudo ~/raspi/build/qt5.8-host/bin/qmake -r

Running configuration tests...
Done running configuration tests.

Configure summary:

Qt WebEngine:
  Proprietary Codecs ..................... no
  Spellchecker ........................... yes
  ALSA ................................... yes
  PulseAudio ............................. yes

Qt is now configured for building. Just run 'make'.
Once everything is built, Qt is installed.
You should NOT run 'make install'.
Note that this build cannot be deployed to other machines or devices.

Prior to reconfiguration, make sure you remove any leftovers from
the previous build.

Running configure tests
Checking for alsa... yes
Checking for khr... yes
Checking for libvpx... no
Checking for snappy... no
Checking for srtp... no
Project MESSAGE: PKG_CONFIG_LIBDIR automatically set to /home/syoung/raspi/sysroot/usr/lib/pkgconfig:/home/syoung/raspi/sysroot/usr/share/pkgconfig:/home/syoung/raspi/sysroot/usr/lib/arm-linux-gnueabihf/pkgconfig
Project MESSAGE: PKG_CONFIG_SYSROOT_DIR automatically set to /home/syoung/raspi/sysroot
System zlib or minizip not found. Using Chromium's copies.
System libwebp or libwebpdemux not found. Using Chromium's copies.
System libevent not found. Using Chromium's copy.
System jsoncpp not found. Using Chromium's copy.
System opus not found. Using Chromium's copy.
System protobuf not found. Using Chromium's copy.
Compatible system libvpx not found. Using Chromium's copy.
System libsrtp not found. Using Chromium's copy.
System snappy not found. Using Chromium's copy.
System library dependencies:
  ICU ................................ Using internal copy (Default, force system ICU with WEBENGINE_CONFIG+=use_system_icu)
  FFMPEG ............................. Using internal copy (Default, force system FFMPEG with WEBENGINE_CONFIG+=use_system_ffmpeg)
  Optional system libraries used ..... libxslt libxml2
  Optional bundled libraries used .... libevent jsoncpp opus protobuf libvpx srtp snappy icu ffmpeg
Configurable features:
  Proprietary codecs (H264, MP3) ..... Not enabled         (Default, enable with WEBENGINE_CONFIG+=use_proprietary_codecs)
  Geolocation ........................ Not enabled         (Requires Qt Positioning module)
  Certificate handling ............... Using bundled BoringSSL
Reading /home/syoung/raspi/src/qtwebengine/src/src.pro
 Reading /home/syoung/raspi/src/qtwebengine/src/core/core.pro
  Reading /home/syoung/raspi/src/qtwebengine/src/core/core_headers.pro
Project MESSAGE: perl -w /home/syoung/raspi/build/qt5.8-host/bin/syncqt.pl -module QtWebEngineCore -version 5.8.1 -outdir /home/syoung/raspi/src/qtwebengine /home/syoung/raspi/src/qtwebengine
<srcbase> = /home/syoung/raspi/src/qtwebengine 
<outbase> = /home/syoung/raspi/src/qtwebengine 
QtWebEngineCore: created fwd-include header(s) for <srcbase>/src/core/api/ { qtwebenginecoreglobal.h (1), qtwebenginecoreglobal_p.h (1), qwebenginecallback.h (2), qwebenginecallback_p.h (1), qwebenginecookiestore.h (2), qwebenginecookiestore_p.h (1), qwebengineurlrequestinfo.h (2), qwebengineurlrequestinfo_p.h (1), qwebengineurlrequestinterceptor.h (2), qwebengineurlrequestjob.h (2), qwebengineurlschemehandler.h (2) }
QtWebEngineCore: created version header
QtWebEngineCore: created master header
QtWebEngineCore: created headers.pri file
  Reading /home/syoung/raspi/src/qtwebengine/src/core/core_gyp_generator.pro
  Reading /home/syoung/raspi/src/qtwebengine/src/core/gyp_configure_host.pro
  Reading /home/syoung/raspi/src/qtwebengine/src/core/gyp_configure_target.pro
  Reading /home/syoung/raspi/src/qtwebengine/src/core/gyp_run.pro
Project MESSAGE: PKG_CONFIG_LIBDIR automatically set to /home/syoung/raspi/sysroot/usr/lib/pkgconfig:/home/syoung/raspi/sysroot/usr/share/pkgconfig:/home/syoung/raspi/sysroot/usr/lib/arm-linux-gnueabihf/pkgconfig
Project MESSAGE: PKG_CONFIG_SYSROOT_DIR automatically set to /home/syoung/raspi/sysroot
Project MESSAGE: Running gyp_qtwebengine "/home/syoung/raspi/src/qtwebengine/src/core" -D qt_cross_compile=1 -D os_posix=1 -D qt_os="embedded_linux" -I config/embedded_linux.gypi -D pkg-config="/home/syoung/raspi/src/qtwebengine/src/core/pkg-config_wrapper.sh 2> /dev/null" -D use_qt=1 -D v8_use_external_startup_data=0 -D enable_web_speech=0 -D enable_extensions=0 -D linux_use_bundled_gold=0 -D linux_use_bundled_binutils=0 -D linux_use_gold_flags=0 -D toolkit_uses_gtk=0 -D use_ash=0 -D use_aura=1 -D use_cairo=0 -D use_clipboard_aurax11=0 -D use_cups=0 -D use_gconf=0 -D use_gio=0 -D use_gnome_keyring=0 -D use_kerberos=0 -D use_pango=0 -D use_openssl=1 -D use_allocator=none -D use_experimental_allocator_shim=0 -D use_nss_certs=0 -D use_nss_verifier=0 -D use_openssl_certs=1 -D use_system_libpng=1 -D use_system_libjpeg=1 -D use_pulseaudio=1 -D use_alsa=1 -D use_system_libxml=1 -D clang=0 -D desktop_linux=0 -D disable_nacl=1 -D embedded=1 -D enable_autofill_dialog=0 -D enable_automation=0 -D enable_basic_printing=0 -D enable_captive_portal_detection=0 -D enable_extensions=0 -D enable_google_now=0 -D enable_language_detection=0 -D enable_managed_users=0 -D enable_pdf=0 -D enable_plugin_installation=0 -D enable_plugins=0 -D enable_print_preview=0 -D enable_session_service=0 -D enable_task_manager=0 -D enable_themes=0 -D enable_webrtc=0 -D gtest_target_type=none -D host_clang=0 -D notifications=0 -D ozone_auto_platforms=0 -D ozone_platform_dri=0 -D ozone_platform_test=0 -D p2p_apis=0 -D safe_browsing=0 -D toolkit_views=1 -D use_custom_freetype=0 -D use_libpci=0 -D use_ozone=1 -D use_system_fontconfig=1 -D use_x11=0 -D v8_use_snapshot=false -D want_separate_host_toolset=1 -D angle_enable_gl=0  -D qtwe_process_name_debug=QtWebEngineProcess -D qtwe_process_name_release=QtWebEngineProcess -D disable_glibcxx_debug=1 -D remove_webcore_debug_symbols=1 -D remove_v8base_debug_symbols=1 -D disable_fatal_linker_warnings=1 -D sysroot="/home/syoung/raspi/sysroot" -D CXX="/home/syoung/raspi/tools/arm-bcm2708/arm-rpi-4.9.3-linux-gnueabihf/bin/arm-linux-gnueabihf-g++" -D target_arch=arm -D arm_arch="armv8-a" -D arm_tune="cortex-a53" -D arm_float_abi="hard" -D arm_version="8" -D arm_fpu="crypto-neon-fp-armv8" -D arm_neon=1 -D release_optimize=s -D debug_optimize=s -D win_release_Optimization=1 -D release_unwind_tables=0 -D enable_spellcheck=1.
using python: /usr/bin/python version: 2.7.12
Using extra options found in /home/syoung/raspi/src/qtwebengine/src/core/qmake_extras.gypi
Using extra options found in /home/syoung/raspi/src/qtwebengine/src/core/qtwebengine_extras.gypi
Using extra options found in /home/syoung/raspi/src/qtwebengine/src/core/qmake_extras.gypi
Using extra options found in /home/syoung/raspi/src/qtwebengine/src/core/qtwebengine_extras.gypi
Updating projects from gyp files...
gyp: name 'arm_thumb' is not defined while evaluating condition 'arm_thumb==1' in /home/syoung/raspi/src/qtwebengine/src/core/resources/resources.gyp
gyp: name 'arm_thumb' is not defined while evaluating condition 'arm_thumb==1' in /home/syoung/raspi/src/qtwebengine/src/core/core_generated.gyp
Project ERROR: -- running gyp_qtwebengine failed --
syoung@Ubuntu16-VM:~/raspi/src/qtwebengine$

sly110

@aktay

FYI: using https://github.com/Kukkimonsuta/rpi-buildqt
I have previously built:
3.1, 3.2, 3.3. 34. AND svg, virtualkeyboard, serialport

tried doing connectivity but it apparently depends on NFC that I did not see in the qt repo.

aktay

@sly110 said in How to build Qt for Raspberry Pi3:

sudo git submodule update --init

You can review the below guide.
https://wiki.qt.io/How_to_Try_QtWebEngine

sly110

I believe this is finally solved although it was an arduous process.

Started with fresh Ubuntu16 LTS and fresh Jessie Lite
Followed Aktays instructions to manually build qtwebengine. Each time it failed, tried to determine missing dependencies. This is what is needed on the VM in addition to those listed in Kukkimonsuta/rpi-buildqt : gperf, bison, flex, gcc-mulitlib, g++ mulitlib, libx32gcc-4.8-dev.

Thanks to everyone who helped!

JHBR

@sly110
What did you do that actually solved the "gyp: name 'arm_thumb' is not defined" error?

Is this actually linked to missing dependencies on the host or target?

I've been trying to cross-compile Qt 5.8 for my RPi3 many different ways now, including the steps mentioned here, but I always end up with this error when it tries to compile qtwebengine.

amruz

I am also trying to crosscompile qt in raspberry pi 2 for the past weeks following the

https://www.ics.com/blog/configuring-qt-creator-raspberry-pi

https://wiki.qt.io/RaspberryPi2EGLFS

. I configured it without any errors. When i am running a console application the output is getting displayed on the raspberry pi but when i am trying to debug a widget application i am getting this displayed in my qt creator.

Unable to find dynamic linker breakpoint function.
GDB will be unable to debug shared library initializers
and track explicitly loaded dynamic code.Could not load shared library symbols for 22 libraries, e.g. /usr/lib/arm-linux-gnueabihf/libarmmem.so.
Use the "info sharedlibrary" command to see the complete listing.
Do you need "set solib-search-path" or "set sysroot"?Unable to query physical screen size, defaulting to 100 dpi.
To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).

can anyone help me in this?
thanks in advance

sneubert

Hi amruz,

the build of your qt libraries is not in you sysroot. You can either copy qt5pi directory to <your sysroot>/usr/local/ on your development host or tell gdb to load the libraries from your target (see https://forum.qt.io/topic/76928/raspberry-pi-3-debug-info-how-to-fix/38)

amruz

@sneubert i tried by writing these commands in additional startup commands in qt
set sysroot target:/
but the same warning is coming..
when i am running a console app it is getting displayed in the raspberry without any problems.
but for widget application

Unable to query physical screen size, defaulting to 100 dpi.
To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).

is coming.
:(

sneubert

@amruz

ok, my answer was to solve the problem not beeing abel to debug your application:

Unable to find dynamic linker breakpoint function.
GDB will be unable to debug shared library initializers
and track explicitly loaded dynamic code.Could not load shared library symbols for 22 libraries, e.g. /usr/lib/arm-linux-gnueabihf/libarmmem.so.
Use the "info sharedlibrary" command to see the complete listing.
Do you need "set solib-search-path" or "set sysroot"?

for the remaining message:

Unable to query physical screen size, defaulting to 100 dpi.
To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).

take a look at previous posts in this forum, e.g.
https://forum.qt.io/topic/77387/eglfs-unable-to-query-physical-screen-size-defaulting-to-100-dpi

Zevero

Work around for arm_thumb error is to be found here
https://github.com/Kukkimonsuta/rpi-buildqt/pull/7

Following
https://github.com/Kukkimonsuta/rpi-buildqt/issues/8
I succeeded even in compiling 5.9 (arm_thumb work around was not necessary any more)

Both qtwebengine 5.8 and 5.9 work nicely and fast BUT mouse interaction does not work (only keyboard). Anybody had this experience? Very frustrating after all the trouble...