Maybe you have another Qt installed by your system?
See https://forums.gentoo.org/viewtopic-p-7864110.html
lasconic
2017-02-21 21:25 GMT+01:00 Maurizio M. Gavioli <miwa...@miwarre.org>:
> Sorry to revive this thread, but this is happening again to me. Background:
> having just had an HD failure, I had to re-install and re-configure
> everything. Looking ahead I installed the latest Qt, 5.8, which compiles
> ver. 3.0 (aka master) perfectly. So far, so good.
>
> Having to deal with 2.1 too, parallel to Qt 5.8, I also installed Qt 5.4
> via
> Qt own maintenance tool. It does compile everything, but it has problems
> when linking the executable.
>
> First of all, it seems unable to find some of its own libraries
> (libicui18n.so.53 and libicuuc.so.53), which I solved via a suitable
> LD_LIBRARY_LOAD environment variable.
>
> Then, it complains about:
>
> "libQt5WebKit.so.5.4.2: undefined reference to
> `QWindowSystemInterface::registerTouchDevice(QTouchDevice*)'"
>
> I have installed everything about 5.4 (except Android and source code).
> Note
> that the class QWindowSystemInterface seems unknown to Qt own help system.
>
> Just for info, my system is Linux Mint 17.3 with Mate desktop. Any advise
> is
> welcome...
>
>
>
> --
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> Error-while-compiling-tp7579819p7580145.html
> Sent from the MuseScore Developer mailing list archive at Nabble.com.
>
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