[scribus] Linking error

[Wayne DePrince Jr.]

On mar, 2014-09-23 at 14:53 +0200, Morten Langlo wrote: 

> Tue, Sep 23, 2014 at 10:23:05AM +0200, skrev JLuc:
> > Le 22/09/2014 16:52, Morten Langlo a écrit :
> > 
> > >I think It tells You, that this symbol is found
> > >in libQt5PrintSupport.so.5 and wants You to link to it.
> > >try adding
> > >    -DCMAKE_EXE_LINKER_FLAGS=-lQt5PrintSupport
> > >to your cmake command, and see if it helps!
> > >Enjoy
> > 
> > Thanks for answerring. Alas, I tried various -DCMAKE_EXE_LINKER_FLAGS
> > but did not succeed.
> > 
> > BTW there's something i dont fully understand :
> > 
> > - Each Qt new version download comes with a bunch of .so packed in the the lib folder
> > These seem to be libraries.
> > Either declarations only or actual code, i dont know...
> > These libs change each time a new Qt version is out.
> 
> Yes, it is actual code, and change with each new version.
> 
> AND, if the header files are in a seperate package, 
> you also need to upgrade that one.
> 
> > - So as to get the compile/make/link/install process OK, i *also* have to install
> > some libraries packages on my OS (using apt-get or synaptics)
> > Most of these are -dev versions of some other libraries.
> > These libs usually dont change (except when going from Qt4 to Qt5)
> 
> Other libraries you only have to upgrade, if they in some way depend
> on the Qt library. But maybe those programmes - apt-get or synaptics - force
> an upgrade of other libraries together with an upgrade of Qt.
> 
> With an upgrade of Qt5 from 5.3.1 to 5.3.2 You do not need to upgrade 
> other packages, t.ex. scribus 1.5 compiled against Qt 5.3.1 runs happily
> against Qt 5.3.2 without any problem.
> 
> > What different roles do play these 2 sets of libraries ?
> > When do they each become used ?
> 
> If You by this mean .so package and dev-packages (headerfiles), 
> .so packages are used for running a program, and the header files 
> are used, when You compile a program.
> 
> And the dev-package MUST be the same version as the .so package.
> 
> > As with the libQt5PrintSupport issue,
> > could it be that the previously OK apt-get installed libraries
> > do not fit anymore the new Qt5.3.2 provided .so libraries ?
> 
> Well :-)
> now You forced me to upgrade to Qt5-5.3.2 to see what is going on, and found 
> that You now actual need to declare not one but two Qt libraries in the cmake command.
> 
> This works for me:
>    cmake ../Scribus -DCMAKE_INSTALL_PREFIX=/usr/local/scribus_svn  -DWANT_GRAPHICSMAGICK=1 \
>    -DCMAKE_EXE_LINKER_FLAGS="-lQt5Quick -lQt5PrintSupport"
> 
> So add this to whatever cmake command You use:
>    -DCMAKE_EXE_LINKER_FLAGS="-lQt5Quick -lQt5PrintSupport"
> 


    thanks so much, this worked perfectly with similar/long time linking
issues on Gentoo + QT 5.3.1:

https://bugs.gentoo.org/show_bug.cgi?id=486288#c6

thanks again!

peace, w



> before You compile, do a make clean to avoid trouble.
> 
> PS. I am doing this on slackware 14.1 64bit
> 
> Enjoy
> 
> 



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