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[answered] static build my first project
Howdy! I'm trying to statically build my first project, so that it can run on another Linux (Ubuntu) computer.
So far, I've followed the instructions from the following sites:
Here's what I've done:
downloaded a new copy of the tar.gz source code from here: http://qt-project.org/downloads
unpacked the tar file in a new directory on my computer
configure it via: ./configure -prefix /opt/path/name -static -nomake examples -nomake tools -release
make -j 3
Open QtCreator -> Tools -> Options -> Build & Run
clicked "Add...", and added the new qmake file from my new Static Qt directory
The next step: tell my program to change the qmake version in my program's Build Settings. Seems I need to change the "PATH" variable in QtCreator -> Projects -> Build Environment.
Here is my original (unchanged) path:
I changed both the folders that say "/opt/Qt5.2.1/5.2.1/gcc_64/bin", because that was where the old qmake was.
Now, when I Rebuild my project, it does not use the new qmake. Here's what my compile output says:
13:49:24: Running steps for project testPlot2...
13:49:24: Starting: "/usr/bin/make" clean
rm -f moc_mainwindow.cpp moc_qcustomplot.cpp
rm -f ui_mainwindow.h
rm -f main.o mainwindow.o qcustomplot.o moc_mainwindow.o moc_qcustomplot.o
rm -f *~ core *.core
13:49:24: The process "/usr/bin/make" exited normally.
13:49:24: Configuration unchanged, skipping qmake step.
13:49:24: Starting: "/usr/bin/make"
Why does it skip the qmake step? How do I force it to qmake, thereby creating a new Makefile with my new static Qt files?
You need to add that new Qt version to Qt Creator, then make a kit with it and finally use that kit with your project
Awesome - that worked. Now my new executable is 16.5MB (previously it was 750kB) so that's a good sign.
Unfortunately, I'm not all the way there yet. It seems I still have other dependencies with this new static build. Here is the error when I try to run on another computer:
./testQtStatic: error while loading shared libraries: libxcb-render-util.so.0: cannot open shared object file: No such file or directory
Weird thing is, I don't have this file on my original computer anywhere (not in the static Qt, or in my "regular" dynamic Qt). So - how can the executable work on my original computer without this file? Is the file somehow hidden?
I found this thread, it seems to explain similar details, but not my issue. http://qt-project.org/forums/viewthread/5080 Maybe I'm missing something :)
libxcb is a system library used for the xcb platform plugin, you'll need to have it installed on your other computer in order to run the application
Excellent. I forgot that I had done that on my original computer (I had copy-pasted the commands from a WikiHow page and didn't realize what it was doing).
Now - I'm finally done with the errors. Here was the last hiccup:
QFontDatabase: Cannot find font directory /opt/Qt5.2.1/static_5.2.1/lib/fonts - is Qt installed correctly?
Aborted (core dumped)
I've found some "information (your old thread)":https://qt-project.org/forums/viewthread/26779 which seems to say that it is necessary to "make install" the Static build.
Since I did do the make install on my original computer, I knew this wasn't it.
I came across "another thread (thread)":http://www.qtcentre.org/threads/56362-Qt5-prebuilt-Linux-64-bit-libraries-segfaults-with-quot-QFontDatabase-Cannot-find-font-d that states that this error goes away if you create the directory it wants. This works for me - seems to be a silly work-around, but I'm ok with that.
Indeed, you must install every build unless you are doing a developer build