Re: [stable build from source] Ubuntu 20.04 scintilla not found

[John W. Eaton]

On 6/17/20 2:36 PM, JuanPi wrote:
> Hi all,
>
> Thanks for the support. I have re-installed all the packages that were
> listed for 19.10 (changed one texlive package, updated our wiki)[1].
> This doesn't solve the issue.
> The errors I get if I ignore the false negative detection of
> qscintilla are below
>
> /usr/bin/ld: cannot find -lQt5Network
> /usr/bin/ld: cannot find -lQt5PrintSupport
> /usr/bin/ld: cannot find -lQt5Help
> /usr/bin/ld: cannot find -lQt5Widgets
> /usr/bin/ld: cannot find -lQt5Gui
> /usr/bin/ld: cannot find -lQt5Sql
> /usr/bin/ld: cannot find -lQt5Xml
> /usr/bin/ld: cannot find -lQt5Core
> collect2: error: ld returned 1 exit status
> make[2]: *** [Makefile:15710: src/octave-svgconvert] Error 1
> make[2]: *** Waiting for unfinished jobs....
> make[2]: Leaving directory '/home/juanpi/Devel/octave/builds/stable'
> make[1]: *** [Makefile:27451: all-recursive] Error 1
> make[1]: Leaving directory '/home/juanpi/Devel/octave/builds/stable'
> make: *** [Makefile:11076: all] Error 2

This looks like it is failing to build octave-svgconvert?  Could you run

  make V=1

and show the context for the last failure?  The last 50 lines or so 
should be enough, but I need to see the commands that were executed 
along with the error messages.

> This is preceded by huge list of warnings similar to
> /usr/include/x86_64-linux-gnu/qt5/QtWidgets/qstyleoption.h: In member
> function ‘QStyleOptionSizeGrip& QStyleOptionSizeGrip::operator=(const
> QStyleOptionSizeGrip&)’:
> /usr/include/x86_64-linux-gnu/qt5/QtWidgets/qstyleoption.h:645:24:
> warning: implicitly-declared ‘QStyleOptionComplex&
> QStyleOptionComplex::operator=(const QStyleOptionComplex&)’ is
> deprecated [-Wdeprecated-copy]

Those are because GCC added some new warnings.  You can ignore them. 
The Qt code is still valid, but should be updated to conform to current 
C++ standards.

jwe