Definitive guide to building source from downloaded .run file?

KH-219Design

regarding the question about not finding a plugin... I'm not really sure, but you might try running ldd on the so you built.

if ldd produces anything like either of these, then you would be missing load-time dependencies for your so:

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 ldd on libQt5Gui only for the sake of generating sample output. I am not suggesting you ldd libQt5Gui, but rather that you ldd libxcb.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 xkbcommon and see what you get.

You could also run apt-cache show libxkbcommon-dev and make sure the version is greater than 0.5.0

Racking 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).

Tom asso

Running pkg-config from the command line:

% /usr/bin/pkg-config --libs xkbcommon
-lxkbcommon

And "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!

SGaist

What Ubuntu version are you running ?

KH-219Design

@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

@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...

KH-219Design

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-default

Has that been tried yet? I've lost track :)

Tom asso

@SGaist - I am running Ubuntu 18.04.4

Tom asso

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

KH-219Design

@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.list

Described here: https://wiki.qt.io/Building_Qt_5_from_Git#Linux.2FX11

Tom asso

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".

KH-219Design

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-default

Note the: build-dep

https://askubuntu.com/questions/324845/whats-the-difference-between-apt-get-install-and-apt-get-build-dep

KH-219Design

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 configure of 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)

Tom asso

This post is deleted!

Tom asso

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?

KH-219Design

@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

Tom asso

@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 update

sudo 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 xvfb

So 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.

Tom asso

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?

SGaist

Check the bug report system.

Tom asso

Many thanks to all for your help in solving this problem for me!

The following procedure to build Qt from the "offline installer" .run file,
e.g. qt-opensource-linux-x64-5.14.2.run, works for me on ubuntu 18.04.4:

Download .run file from "official release" site
Execute the .run file downloaded in the previous step and answer questions prompted by the "wizard"
Do the following:

% cd <QtHome>/5.14.2/Src
% ./configure -qt-xcb   # I want to build Qt's xcb sources
% make
% make install  # Installs into /usr/local/Qt5.14.2 by default

To build Qt applications using those sources and libraries do the following:

% export PATH=/usr/local/Qt5.14.2/bin:$PATH
% export LD_LIBRARY_PATH=/usr/local/Qt5.14.2/lib:$LD_LIBRARY_PATH

Setting PATH like this ensures that the qmake executable is properly associated with the headers and libraries you installed in /usr/local/Qt5.14.2.