Definitive guide to building source from downloaded .run file?
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@KH-219Design - I will try that. But in the meantime I actually built shared library libxcb.so "by hand" (since 'make' failed) and copied it into the plugins/platforms directory:
% g++ -shared -o libxcb.so *.o % sudo cp libxcb.so /usr/shared/Qt5.14.2/plugins/platforms/.I then rebuilt my app and tried to run it:
% qmake % make clean % make % ./mbgrdviz-2 qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in "/usr/local/Qt-5.14.2/plugins/platforms" This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem. Available platform plugins are: eglfs (from /usr/local/Qt-5.14.2/plugins/platforms), linuxfb (from /usr/local/Qt-5.14.2/plugins/platforms), minimal (from /usr/local/Qt-5.14.2/plugins/platforms), minimalegl (from /usr/local/Qt-5.14.2/plugins/platforms), offscreen (from /usr/local/Qt-5.14.2/plugins/platforms), vnc (from /usr/local/Qt-5.14.2/plugins/platforms), wayland-egl (from /usr/local/Qt-5.14.2/plugins/platforms), wayland (from /usr/local/Qt-5.14.2/plugins/platforms), webgl (from /usr/local/Qt-5.14.2/plugins/platforms), eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, webgl.So although the library I built, libxcb.so, is in /usr/shared/Qt5.14.2/plugsins/platforms, it is not detected as a "plugin" - why might that be? Is there some special step to "register" a plugin?
Thanks! -
Man, I have no idea how you guys are able to get this to work ;-)
Heh. I think it is like eating spicy food. First you develop a tolerance for it gradually, then you actually start to crave and enjoy it ;)
Hmmm....
I've got 2 thoughts now.
The most direct attack would be to get further into this:
./configure -qt-xcb [...] ERROR: Feature 'xcb' was enabled, but the pre-condition 'features.thread && features.xkbcommon && libs.xcb' failed.That seems to me like a good approach, and there must be more info "somewhere" about that failure. Isn't there a
config.logfile somewhere, as an output from the configure? Its contents should look roughly like:... truncated ... executing config test linuxfb + cd /opt/repositories/fc-build-01/qt5_dbg_configuration/config.tests/linuxfb && PKG_CONFIG_SYSROOT_DIR=/ PKG_CONFIG_LIBDIR=//usr/lib/pkgconfig://usr/share/pkgconfig://usr/lib/x86_64-linux-gnu/pkgconfig /opt/repositories/fc-build-01/qt5_dbg_configuration/qtbase/bin/qmake "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared warn_off console single_arch" "QMAKE_CFLAGS += --sysroot=/" "QMAKE_CXXFLAGS += --sysroot=/" "QMAKE_LFLAGS += --sysroot=/" -early "CONFIG += cross_compile" /opt/repositories/fc-build-01/qt5_dbg_configuration/config.tests/linuxfb + cd /opt/repositories/fc-build-01/qt5_dbg_configuration/config.tests/linuxfb && MAKEFLAGS= /usr/bin/make > g++ -c -pipe --sysroot=/ --sysroot=/ -g -w -fPIC -I. -I/opt/repositories/qt5_sources/qtbase/mkspecs/linux-g++ -o main.o main.cpp > g++ --sysroot=/ --sysroot=/ -o linuxfb main.o test config.qtbase_gui.tests.linuxfb succeeded looking for library mtdev Trying source 0 (type pkgConfig) of library mtdev ... + PKG_CONFIG_SYSROOT_DIR=/ PKG_CONFIG_LIBDIR=//usr/lib/pkgconfig://usr/share/pkgconfig://usr/lib/x86_64-linux-gnu/pkgconfig /usr/bin/pkg-config --exists --silence-errors mtdev + PKG_CONFIG_SYSROOT_DIR=/ PKG_CONFIG_LIBDIR=//usr/lib/pkgconfig://usr/share/pkgconfig://usr/lib/x86_64-linux-gnu/pkgconfig /usr/bin/pkg-config --modversion mtdev > 1.1.5 + PKG_CONFIG_SYSROOT_DIR=/ PKG_CONFIG_LIBDIR=//usr/lib/pkgconfig://usr/share/pkgconfig://usr/lib/x86_64-linux-gnu/pkgconfig /usr/bin/pkg-config --libs-only-L mtdev + PKG_CONFIG_SYSROOT_DIR=/ PKG_CONFIG_LIBDIR=//usr/lib/pkgconfig://usr/share/pkgconfig://usr/lib/x86_64-linux-gnu/pkgconfig /usr/bin/pkg-config --libs-only-l mtdev > -lmtdev + PKG_CONFIG_SYSROOT_DIR=/ PKG_CONFIG_LIBDIR=//usr/lib/pkgconfig://usr/share/pkgconfig://usr/lib/x86_64-linux-gnu/pkgconfig /usr/bin/pkg-config --cflags mtdev + cd /opt/repositories/fc-build-01/qt5_dbg_configuration/config.tests/mtdev && PKG_CONFIG_SYSROOT_DIR=/ PKG_CONFIG_LIBDIR=//usr/lib/pkgconfig://usr/share/pkgconfig://usr/lib/x86_64-linux-gnu/pkgconfig /opt/repositories/fc-build-01/qt5_dbg_configuration/qtbase/bin/qmake "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared warn_off console single_arch" "QMAKE_CFLAGS += --sysroot=/" "QMAKE_CXXFLAGS += --sysroot=/" "QMAKE_LFLAGS += --sysroot=/" -early "CONFIG += cross_compile" 'QMAKE_USE += mtdev' 'QMAKE_LIBS_MTDEV = -lmtdev' /opt/repositories/fc-build-01/qt5_dbg_configuration/config.tests/mtdev + cd /opt/repositories/fc-build-01/qt5_dbg_configuration/config.tests/mtdev && MAKEFLAGS= /usr/bin/make > g++ -c -pipe --sysroot=/ --sysroot=/ -g -w -fPIC -I. -I/opt/repositories/qt5_sources/qtbase/mkspecs/linux-g++ -o main.o main.cpp > g++ --sysroot=/ --sysroot=/ -o mtdev main.o -lmtdev => source accepted. test config.qtbase_gui.libraries.mtdev succeeded looking for library openvg Trying source 0 (type pkgConfig) of library openvg ... + PKG_CONFIG_SYSROOT_DIR=/ PKG_CONFIG_LIBDIR=//usr/lib/pkgconfig://usr/share/pkgconfig://usr/lib/x86_64-linux-gnu/pkgconfig /usr/bin/pkg-config --exists --silence-errors vg pkg-config did not find package. => source produced no result. Trying source 1 (type makeSpec) of library openvg ... VG/openvg.h not found in [] and global paths. => source produced no result. test config.qtbase_gui.libraries.openvg FAILED executing config test qpa_default_platform test config.qtbase_gui.tests.qpa_default_platform gave result xcb looking for library harfbuzz Trying source 0 (type inline) of library harfbuzz ... + cd /opt/repositories/fc-build-01/qt5_dbg_configuration/config.tests/harfbuzz && PKG_CONFIG_SYSROOT_DIR=/ PKG_CONFIG_LIBDIR=//usr/lib/pkgconfig://usr/share/pkgconfig://usr/lib/x86_64-linux-gnu/pkgconfig /opt/repositories/fc-build-01/qt5_dbg_configuration/qtbase/bin/qmake "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared warn_off console single_arch" "QMAKE_CFLAGS += --sysroot=/" "QMAKE_CXXFLAGS += --sysroot=/" "QMAKE_LFLAGS += --sysroot=/" -early "CONFIG += cross_compile" 'QMAKE_USE += harfbuzz' 'QMAKE_LIBS_HARFBUZZ = -lharfbuzz' /opt/repositories/fc-build-01/qt5_dbg_configuration/config.tests/harfbuzz ... truncated ...Hopefully there would be a more precise answer in there as to exactly what steps caused "features.xkbcommon" (and the others) to fail.
A less direct attack would be:
... if we assume the configure failed because you simply need more dev headers of more cascading dependencies to be available on your machine for the compiler to use...
Then if you try this and things get installed:
sudo sed -i -- 's/#deb-src/deb-src/g' /etc/apt/sources.list sudo sed -i -- 's/# deb-src/deb-src/g' /etc/apt/sources.list sudo apt-get update sudo apt-get build-dep qt5-defaultThen just try
./configure -qt-xcbagain (or even a bare./configure), and this time configure should be able to detect more build dependencies on the system.@KH-219Design - taking the "direct attack" by looking into the config.log file... I just installed the ubuntu package for xkbcommon (apt install libxkbcommon-dev), verified presence of /usr/include/xkbcommon/xkbcommon.h. Then re-ran "./configure -qt-xcb" which again gives "ERROR: Feature 'xcb' was enabled, but the pre-condition 'features.thread && features.xkbcommon && libs.xcb' failed." I look in config.logs and see these lines:
loaded result for library config.qtbase_gui.libraries.xkbcommon Trying source 0 (type pkgConfig) of library xkbcommon ... + /usr/bin/pkg-config --exists --silence-errors xkbcommon '>=' 0.5.0 pkg-config did not find package. => source produced no result. Trying source 1 (type inline) of library xkbcommon ... xkbcommon/xkbcommon.h not found in [] and global paths. => source produced no result. test config.qtbase_gui.libraries.xkbcommon FAILEDSo configure cannot find /usr/include/xkbcommon/xkbcommon.h - even though it exists?
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regarding the question about not finding a plugin... I'm not really sure, but you might try running
lddon thesoyou built.if
lddproduces anything like either of these, then you would be missing load-time dependencies for yourso:bad outcome #1:
ldd libQt5Gui.so.5.14.0 # this message about the version not found is bad: ./libQt5Gui.so.5.14.0: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5.14' not found (required by ./libQt5Gui.so.5.14.0) linux-vdso.so.1 (0x00007ffe7e3e5000) libQt5Core.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 (0x00007f30cdac6000) libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f30cd8a7000)bad outcome #2 ("not found"):
ldd libQt5Gui.so.5.14.0 linux-vdso.so.1 (0x00007ffc16ba5000) libQt5Core.so.5 => not found # <-- anything "not found" is a problem libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f624ce6a000) libGL.so.1 => /usr/lib/x86_64-linux-gnu/libGL.so.1 (0x00007f624cbde000) libharfbuzz.so.0 => /usr/lib/x86_64-linux-gnu/libharfbuzz.so.0 (0x00007f624c940000)(Note: I ran
lddon libQt5Gui only for the sake of generating sample output. I am not suggesting youlddlibQt5Gui, but rather that youlddlibxcb.so )Regarding your results from the direct attack on configure failures:
+ /usr/bin/pkg-config --exists --silence-errors xkbcommon '>=' 0.5.0 pkg-config did not find package.You could run
/usr/bin/pkg-config --libs xkbcommonand see what you get.You could also run
apt-cache show libxkbcommon-devand make sure the version is greater than 0.5.0Racking my brain trying to think what else...
I guess just make sure any "left over cruft" from previous configure attempts are interfering... (but I could not enumerate what kinds of cruft you should be looking for).
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Running pkg-config from the command line:
% /usr/bin/pkg-config --libs xkbcommon -lxkbcommonAnd "apt-cache show libxkbcommon-dev" shows version 0.8.0-1.
Thanks for all your help @KH-219Design !
I've been evaluating Qt for a seafloor-mapping project for a few months now - Qt has its share of bugs, there are many many moving pieces to it, many of those pieces barely documented or not documented at all - a very steep learning curve, at least for me. I'm grateful that you and others in the community provide invaluable help! -
What Ubuntu version are you running ?
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@Tom-asso said in Definitive guide to building source from downloaded .run file?:
xkbcommon.h not found in [] and global paths
I'm reading through this right now... seems like the same "xkbcommon" problem: https://forum.qt.io/topic/100908/qt-5-12-2-raspberry-pi-x11/16
www.219design.com
Software | Electrical | Mechanical | Product Design -
@Tom-asso said in Definitive guide to building source from downloaded .run file?:
xkbcommon.h not found in [] and global paths
I'm reading through this right now... seems like the same "xkbcommon" problem: https://forum.qt.io/topic/100908/qt-5-12-2-raspberry-pi-x11/16
@KH-219Design said in Definitive guide to building source from downloaded .run file?:
seems like the same "xkbcommon" problem: https://forum.qt.io/topic/100908/qt-5-12-2-raspberry-pi-x11/16
Maybe I spoke too soon. Although the same error is mentioned, that thread seems entirely RPi specific in the end. Arggg...
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I also found this: https://github.com/RudolfCardinal/camcops/issues/3
... which seems to circle back to:
sudo sed -i -- 's/#deb-src/deb-src/g' /etc/apt/sources.list sudo sed -i -- 's/# deb-src/deb-src/g' /etc/apt/sources.list sudo apt-get update sudo apt-get build-dep qt5-defaultHas that been tried yet? I've lost track :)
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Thanks @KH-219Design - I haven't tried the "sed" yet - what exactly will those commands do?
sudo sed -i -- 's/#deb-src/deb-src/g' /etc/apt/sources.list sudo sed -i -- 's/# deb-src/deb-src/g' /etc/apt/sources.list sudo apt-get update sudo apt-get build-dep qt5-default -
@Tom-asso said in Definitive guide to building source from downloaded .run file?:
I haven't tried the "sed" yet - what exactly will those commands do?
The sed commands are to work around:
E: You must put some 'source' URIs in your sources.listDescribed here: https://wiki.qt.io/Building_Qt_5_from_Git#Linux.2FX11
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I'm reluctant to install the ubuntu qt5-default at this point - in the past I've run into problems when mixing ubuntu qt-related packages with source/software downloaded from download.qt.io. And I don't think I've actually seen the message "E: You must put some 'source' URIs in your sources.list".
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Ah. I totally understand your concern about mixing and matching the "Ubuntu system Qt5" with the one that you built.
But not to fear! The command suggested by me (and several wiki pages, and on that github issue I linked to this morning) is not for installing the Qt5 system binary libraries!
The command is to install BUILD dependencies:
sudo apt-get build-dep qt5-defaultNote the: build-dep
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Wow. An eerily similar discussion is going on simultaneously: https://forum.qt.io/topic/114826/static-build-qt-getting-error-because-of-xcb/6
Maybe there is something broken with
configureof 5.14.2.The last time I successfully built from source was 5.14.0, so I wonder...
(If I have time later today or tomorrow, perhaps I will try with 14.2)
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Hmm... I'm stuck in a place with really slow bandwidth, but I'll try to get qt-everywhere-src-5.14.0.tar.xz and build.
@KH-219Design - did you build 5.14.0 on ubuntu? What version, and how did it go? -
@Tom-asso said in Definitive guide to building source from downloaded .run file?:
did you build 5.14.0 on ubuntu? What version, and how did it go?
I built in on both Ubuntu 18.04 and 16.04 and it went perfectly well. But I cloned the sources from code.qt.io and used the script I linked to earlier: https://github.com/219-design/build_qt_binaries/blob/09ad9369c8abfead615075f067f402fd89f/script.sh
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@KH-219Design said in Definitive guide to building source from downloaded .run file?:
sudo sed -i -- 's/#deb-src/deb-src/g' /etc/apt/sources.list
sudo sed -i -- 's/# deb-src/deb-src/g' /etc/apt/sources.list
sudo apt-get updatesudo apt-get build-dep qt5-default
I ran those commands. apt-get build-dep qt5-default said:
The following NEW packages will be installed: debhelper dh-autoreconf dh-strip-nondeterminism freetds-common freetds-dev gir1.2-gtk-2.0 libasound2-dev libatk1.0-dev libatspi2.0-dev libcairo-script-interpreter2 libcairo2-dev libct4 libcups2-dev libcupsimage2-dev libevdev-dev libfile-stripnondeterminism-perl libgbm-dev libgdk-pixbuf2.0-dev libgstreamer-plugins-base1.0-dev libgstreamer1.0-dev libgtk2.0-dev libinput-dev libmtdev-dev liborc-0.4-dev liborc-0.4-dev-bin libpango1.0-dev libpixman-1-dev libproxy-dev libpulse-dev libsybdb5 libudev-dev libwacom-dev libxcb-icccm4-dev libxcb-image0-dev libxcb-keysyms1-dev libxcb-render-util0-dev libxcb-shm0-dev libxcb-xkb-dev libxcomposite-dev libxcursor-dev libxi-dev libxinerama-dev libxkbcommon-x11-dev libxml2-utils libxtst-dev pkg-kde-tools po-debconf x11proto-composite-dev x11proto-record-dev x11proto-xinerama-dev xvfbSo it wants to install libxkbcommon-11-dev, among other things. I let it run, then again tried to configure the build:
./configure -qt-xcb [...] ERROR: Feature 'xcb' was enabled, but the pre-condition 'features.thread && features.xkbcommon && libs.xcb' failed.And config.log still contains this:
loaded result for library config.qtbase_gui.libraries.xkbcommon Trying source 0 (type pkgConfig) of library xkbcommon ... + /usr/bin/pkg-config --exists --silence-errors xkbcommon '>=' 0.5.0 pkg-config did not find package. -
I downloaded and extracted qt-everywhere-src-5.14.0.tar.xz, ran './configure -qt-xcb' without error, built and installed it. My qtdatavisualization3d app links successfully and runs. Likewise with qt-everywhere-src-5.14.1.tar.xz. HOWEVER my app runs extremely and unacceptably slowly with 5.14.0 and 5.14.1, so this does NOT solve my problem. But this result indicates there's a problem in configuration scripts for 5.14.2. @SGaist , how do we make this problem known to the Qt team?
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Check the bug report system.
