[scribus] Compiling Scribus 1.4.3 on an ARM CPU (Debian Wheezy)

[Dan Horák]

On Tue, 20 Aug 2013 17:12:50 +0100 (BST)
William Bell <whbell at btinternet.com> wrote:

> Hi,
> 
> I am trying to build Scribus 1.4.3 on an ARM CPU that runs 
> Debian Wheezy (Raspbian).  Following the installation of all of the 
> dependencies, the compilation goes well until 

we in Fedora use
http://pkgs.fedoraproject.org/cgit/scribus.git/tree/scribus-to-double.patch
for ARM, resulting rpms are at
http://koji.fedoraproject.org/koji/taskinfo?taskID=5830461


		Dan

> [ 66%] Building CXX object
> scribus/CMakeFiles/scribus.dir/scpainter.cpp.o /home/pi/Scribus/scribus/scpainter.cpp:
> In member function ‘void ScPainter::drawVPath
> (int)’: /home/pi/Scribus/scribus/scpainter.cpp:1119:31: error: no
> matching function for call to ‘QPen::setDashPattern(QVector<double>&)’
> /home/pi/Scribus/scribus/scpainter.cpp:1119:31: note: candidate is:
> /usr/include/qt4/QtGui/qpen.h:87:10: note: void QPen::setDashPattern
> (const QVector<float>&) /usr/include/qt4/QtGui/qpen.h:87:10:
>  note:   no known conversion for argument 1 from ‘QVector<double>’
>  to ‘const QVector<float>&’
> make[2]: *** [scribus/CMakeFiles/scribus.dir/scpainter.cpp.o] Error 1
> make[1]: *** [scribus/CMakeFiles/scribus.dir/all] Error 2
> make: *** [all]
>  Error 2
> 
> It is very clear why this fails.  In Qt4 there is
> 
> /usr/include/qt4/Qt/qglobal.h
> 
> typedef QT_COORD_TYPE qreal;
> #elif defined(QT_NO_FPU) || defined(QT_ARCH_ARM) || defined
> #(QT_ARCH_WINDOWSCE) || defined(QT_ARCH_SYMBIAN)
> typedef float qreal;
> #else
> typedef double qreal;
> #endif
> 
> The Qt functions use qreal, rather than double of float.  In the
> Scribus source code there are lots of 
> 
> QList<double> and QVector<double>
> 
> While I could use sed to switch these to qreal, there are other
> pieces of code such as
> 
> Scribus/scribus/util.cpp
> 
> void getDashArray(int dashtype, double linewidth, QVector<float>
> &m_array) { QVector<double> tmp;
>    getDashArray(dashtype, linewidth, tmp);
>    m_array.clear();
>    for (int i = 0; i < tmp.count(); ++i) {
>    m_array <<
>  static_cast<float>(tmp[i]);
>   }
> }
> 
> void getDashArray(int dashtype, double linewidth, QVector<double>
> &m_array) {
>         m_array.clear();
>         if ((dashtype == 1) || (dashtype == 0))
>                 return;
>         double Dt = qMax(1.0*linewidth, 0.1);
>         double Sp = qMax(2.0*linewidth,
>  0.1);
>         double Da = qMax(4.0*linewidth, 0.1);
>         switch (dashtype)
>         {
> 
> 
> Why is QVector<double> used instead of QVector<qreal> etc?  If I use
> sed, I will have to remove overloaded functions that include
> <float>.  Is this safe?
> 
> Thanks and best regards,
> Will
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