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Static Qt 5.4.1 without libtiff dependency?



  • Hi there,

    I have a Qt application which I build for a variety of operating systems including Linux. Up until recently I've been using Qt 4 for Linux because it seems to have a lot less dependencies than Qt 5. Very recently I tried building against Qt 5 and let a few of our users try it out. I've tried minimizing dependencies on system libraries using this configuration:

    ./configure -static -nomake examples -qt-zlib -qt-libpng -qt-libjpeg -qt-freetype -qt-harfbuzz -qt-xcb -qt-xkbcommon

    It emerged that dependencies on the ICU and libtiff system libraries were causing compatibility issues on other Linux distributions. ICU was easy to take care of, I just added the -no-icu switch. Webkit needs it, but I don't use Webkit in my project. However I can't figure how to remove the libtiff dependecy. Earlier versions of Qt 5 had a -qt-libtiff switch but not Qt 5.4.1. I could do without tiff support entirely if it's an option. Does anyone know of a possible way to address this issue?

    Thanks, Nir


  • Lifetime Qt Champion

    Hi,

    The tiff support has moved to the qtimageformats plugin. You can also find the sources of libtiff in that module

    Hope it helps



  • Interesting. I tried: QTPLUGINS += qtiff in my project file and it told me it was redundant, I guess because qtiff is already included. So then why is there a dependency on the system's tiff library? I event tried removing the qtiff plugin with QTPLUGINS -= qtiff but it didn't change anything. Maybe there's another component in the Qt library that might rely on it that's creating this dependency?


  • Lifetime Qt Champion

    Are you using stuff that is only in qtbase ?



  • My project file uses:

    QT += widgets core gui network multimedia

    Is that what you mean?


  • Lifetime Qt Champion

    Yes that's what I meant. What you can do is just build qtbase first and then qtmultimedia afterwards. So you'll ensure that you have only these two built, no qtimageformats etc.


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