Regarding Qwt for charts

Pradeep Kumar

Means cant it find the lib,
their is a lib folder and library present , but still y?.

jsulm

@Pradeep-Kumar Sorry, I don't follow you. The linker apparently found the lib but complained that it is not compatible. So, it is there, just execute file command and pass the correct path to the lib.

Pradeep Kumar

sorry for not writing properly.

what i said was their is a lib folder and library present, but still y giving errors?.

So as u mentioned.
So, it is there, just execute file command and pass the correct path to the lib.

How can i achieve it?.

Thanks,

jsulm

@Pradeep-Kumar All you need to do is execute this line in a terminal:

file /home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/designer/../lib/libqwt.so

"but still y giving errors?." - yes it is present, this is not the problem. The problem is that this library is not compatible.

Pradeep Kumar

/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/designer/../lib/libqwt.so: symbolic link to `libqwt.so.6.1.3'

getting the error.

Thanks,

jsulm

@Pradeep-Kumar Then just do

file /home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/designer/../lib/libqwt.so.6.1.3

Pradeep Kumar

/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/designer/../lib/libqwt.so.6.1.3: ELF 32-bit LSB shared object, ARM, EABI5 version 1 (SYSV), dynamically linked, not stripped

its of 32 bit, is it a mismatch?

Thanks,

jsulm

@Pradeep-Kumar The lib was built for ARM. For which architecture do you need it?

Pradeep Kumar

Required for Desktop and Device both.

Thanks,

jsulm

@Pradeep-Kumar Then you need to build QWT for desktop using the correct Qt (correct qmake).

Pradeep Kumar

Correct Qt , qmake.

Where can i check it.

I am using Qt 5.6 versiona s mentioned earlier.

Thanks,

jsulm

@Pradeep-Kumar From your description:

cd to respective directory
cd /home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3
/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3$ PATH_TO_YOUR_DESKTOP_QT/qmake qwt.pro.
/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3$ make.

Pradeep Kumar

cd /home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3
/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3$ /home/user/Qt5.6.0/5.6/gcc_64/bin/qmake qwt.pro
/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3$ make.

Thats i used for Desktop,
same error.

Thanks,

jsulm

@Pradeep-Kumar Which same error? Did you build QWT for desktop? Do you get the error when building QWT or your app using QWT? Can you post the build log?

Pradeep Kumar

user@user-Inspiron-3558:~/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3$ /home/user/Qt5.6.0/5.6/gcc_64/bin/qmake qwt.pro
user@user-Inspiron-3558:~/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3$ make
cd src/ && ( test -e Makefile || /home/user/Qt5.6.0/5.6/gcc_64/bin/qmake /home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/src/src.pro -o Makefile ) && make -f Makefile 
make[1]: Entering directory `/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/src'
make[1]: Nothing to be done for `first'.
make[1]: Leaving directory `/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/src'
cd textengines/ && ( test -e Makefile || /home/user/Qt5.6.0/5.6/gcc_64/bin/qmake /home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/textengines/textengines.pro -o Makefile ) && make -f Makefile 
make[1]: Entering directory `/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/textengines'
make[1]: Nothing to be done for `first'.
make[1]: Leaving directory `/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/textengines'
cd doc/ && ( test -e Makefile || /home/user/Qt5.6.0/5.6/gcc_64/bin/qmake /home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/doc/doc.pro -o Makefile ) && make -f Makefile 
make[1]: Entering directory `/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/doc'
make[1]: Nothing to be done for `first'.
make[1]: Leaving directory `/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/doc'
cd designer/ && ( test -e Makefile || /home/user/Qt5.6.0/5.6/gcc_64/bin/qmake /home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/designer/designer.pro -o Makefile ) && make -f Makefile 
make[1]: Entering directory `/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/designer'
rm -f libqwt_designer_plugin.so
linking plugins/designer/libqwt_designer_plugin.so
/usr/bin/ld: skipping incompatible /home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/designer/../lib/libqwt.so when searching for -lqwt
/usr/bin/ld: cannot find -lqwt
collect2: error: ld returned 1 exit status
make[1]: *** [plugins/designer/libqwt_designer_plugin.so] Error 1
make[1]: Leaving directory `/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/designer'
make: *** [sub-designer-make_first-ordered] Error 2

Getting error while building QWT.

Thanks,

jsulm

@Pradeep-Kumar You should better do out of source builds or at least start from a clean source code tree. Currently you're not building anything as you built in same location before.

Pradeep Kumar

I did clean and then started from first

Got the below output :)

user@user-Inspiron-3558:~/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3$ make

cd src/ && ( test -e Makefile || /home/user/Qt5.6.0/5.6/gcc_64/bin/qmake /home/user/Documents/QwtQwt_forcharts_documents/qwt-6.1.3/src/src.pro -o Makefile ) && make -f Makefile 
make[1]: Entering directory `/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/src'
compiling qwt_abstract_scale_draw.cpp
compiling qwt_clipper.cpp
compiling qwt_color_map.cpp
compiling qwt_column_symbol.cpp
compiling qwt_date.cpp
compiling qwt_date_scale_draw.cpp
compiling qwt_date_scale_engine.cpp
compiling qwt_dyngrid_layout.cpp
compiling qwt_event_pattern.cpp
compiling qwt_graphic.cpp
compiling qwt_interval.cpp
compiling qwt_interval_symbol.cpp
compiling qwt_math.cpp
compiling qwt_magnifier.cpp
compiling qwt_null_paintdevice.cpp
compiling qwt_painter.cpp
compiling qwt_painter_command.cpp
compiling qwt_panner.cpp
compiling qwt_picker.cpp
compiling qwt_picker_machine.cpp
compiling qwt_pixel_matrix.cpp
compiling qwt_point_3d.cpp
compiling qwt_point_polar.cpp
compiling qwt_round_scale_draw.cpp
compiling qwt_scale_div.cpp
compiling qwt_scale_draw.cpp
compiling qwt_scale_map.cpp
compiling qwt_spline.cpp
compiling qwt_scale_engine.cpp
compiling qwt_symbol.cpp
compiling qwt_system_clock.cpp
compiling qwt_text_engine.cpp
compiling qwt_text_label.cpp
compiling qwt_text.cpp
compiling qwt_transform.cpp
compiling qwt_widget_overlay.cpp
compiling qwt_curve_fitter.cpp
compiling qwt_abstract_legend.cpp
compiling qwt_legend.cpp
compiling qwt_legend_data.cpp
compiling qwt_legend_label.cpp
compiling qwt_plot.cpp
compiling qwt_plot_renderer.cpp
compiling qwt_plot_xml.cpp
compiling qwt_plot_axis.cpp
compiling qwt_plot_curve.cpp
compiling qwt_plot_dict.cpp
compiling qwt_plot_directpainter.cpp
compiling qwt_plot_grid.cpp
compiling qwt_plot_histogram.cpp
compiling qwt_plot_item.cpp
compiling qwt_plot_abstract_barchart.cpp
compiling qwt_plot_barchart.cpp
compiling qwt_plot_multi_barchart.cpp
compiling qwt_plot_intervalcurve.cpp
compiling qwt_plot_zoneitem.cpp
compiling qwt_plot_tradingcurve.cpp
compiling qwt_plot_spectrogram.cpp
compiling qwt_plot_spectrocurve.cpp
compiling qwt_plot_scaleitem.cpp
compiling qwt_plot_legenditem.cpp
compiling qwt_plot_seriesitem.cpp
compiling qwt_plot_shapeitem.cpp
compiling qwt_plot_marker.cpp
compiling qwt_plot_textlabel.cpp
compiling qwt_plot_layout.cpp
compiling qwt_plot_canvas.cpp
compiling qwt_plot_panner.cpp
compiling qwt_plot_rasteritem.cpp
compiling qwt_plot_picker.cpp
compiling qwt_plot_zoomer.cpp
compiling qwt_plot_magnifier.cpp
compiling qwt_plot_rescaler.cpp
compiling qwt_point_mapper.cpp
compiling qwt_raster_data.cpp
compiling qwt_matrix_raster_data.cpp
compiling qwt_sampling_thread.cpp
compiling qwt_series_data.cpp
compiling qwt_point_data.cpp
compiling qwt_scale_widget.cpp
compiling qwt_plot_svgitem.cpp
compiling qwt_plot_glcanvas.cpp
compiling qwt_abstract_slider.cpp
compiling qwt_abstract_scale.cpp
compiling qwt_arrow_button.cpp
compiling qwt_analog_clock.cpp
compiling qwt_compass.cpp
compiling qwt_compass_rose.cpp
compiling qwt_counter.cpp
compiling qwt_dial.cpp
compiling qwt_dial_needle.cpp
compiling qwt_knob.cpp
compiling qwt_slider.cpp
compiling qwt_thermo.cpp
compiling qwt_wheel.cpp
moc qwt_dyngrid_layout.h
compiling moc/moc_qwt_dyngrid_layout.cpp
moc qwt_magnifier.h
compiling moc/moc_qwt_magnifier.cpp
moc qwt_panner.h
compiling moc/moc_qwt_panner.cpp
moc qwt_picker.h
compiling moc/moc_qwt_picker.cpp
moc qwt_text_label.h
compiling moc/moc_qwt_text_label.cpp
moc qwt_abstract_legend.h
compiling moc/moc_qwt_abstract_legend.cpp
moc qwt_legend.h
compiling moc/moc_qwt_legend.cpp
moc qwt_legend_label.h
compiling moc/moc_qwt_legend_label.cpp
moc qwt_plot.h
compiling moc/moc_qwt_plot.cpp
moc qwt_plot_renderer.h
compiling moc/moc_qwt_plot_renderer.cpp
moc qwt_plot_canvas.h
compiling moc/moc_qwt_plot_canvas.cpp
moc qwt_plot_panner.h
compiling moc/moc_qwt_plot_panner.cpp
moc qwt_plot_picker.h
compiling moc/moc_qwt_plot_picker.cpp
moc qwt_plot_zoomer.h
compiling moc/moc_qwt_plot_zoomer.cpp
moc qwt_plot_magnifier.h
compiling moc/moc_qwt_plot_magnifier.cpp
moc qwt_sampling_thread.h
compiling moc/moc_qwt_sampling_thread.cpp
moc qwt_scale_widget.h
compiling moc/moc_qwt_scale_widget.cpp
moc qwt_plot_glcanvas.h
compiling moc/moc_qwt_plot_glcanvas.cpp
moc qwt_abstract_slider.h
compiling moc/moc_qwt_abstract_slider.cpp
moc qwt_abstract_scale.h
compiling moc/moc_qwt_abstract_scale.cpp
moc qwt_analog_clock.h
compiling moc/moc_qwt_analog_clock.cpp
moc qwt_compass.h
compiling moc/moc_qwt_compass.cpp
moc qwt_counter.h
compiling moc/moc_qwt_counter.cpp
moc qwt_dial.h
compiling moc/moc_qwt_dial.cpp
moc qwt_knob.h
compiling moc/moc_qwt_knob.cpp
moc qwt_slider.h
compiling moc/moc_qwt_slider.cpp
moc qwt_thermo.h
compiling moc/moc_qwt_thermo.cpp
moc qwt_wheel.h
compiling moc/moc_qwt_wheel.cpp
rm -f libqwt.so.6.1.3 libqwt.so libqwt.so.6 libqwt.so.6.1
linking ../lib/libqwt.so.6.1.3
ln -s libqwt.so.6.1.3 libqwt.so
ln -s libqwt.so.6.1.3 libqwt.so.6
ln -s libqwt.so.6.1.3 libqwt.so.6.1
rm -f ../lib/libqwt.so.6.1.3
mv -f libqwt.so.6.1.3  ../lib/ 
rm -f ../lib/libqwt.so
rm -f ../lib/libqwt.so.6
rm -f ../lib/libqwt.so.6.1
mv -f libqwt.so ../lib/ 
mv -f libqwt.so.6 ../lib/ 
mv -f libqwt.so.6.1 ../lib/ 
make[1]: Leaving directory `/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/src'
cd textengines/ && ( test -e Makefile || /home/user/Qt5.6.0/5.6/gcc_64/bin/qmake /home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/textengines/textengines.pro -o Makefile ) && make -f Makefile 
make[1]: Entering directory `/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/textengines'
make[1]: Nothing to be done for `first'.
make[1]: Leaving directory `/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/textengines'
cd doc/ && ( test -e Makefile || /home/user/Qt5.6.0/5.6/gcc_64/bin/qmake /home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/doc/doc.pro -o Makefile ) && make -f Makefile 
make[1]: Entering directory `/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/doc'
make[1]: Nothing to be done for `first'.
make[1]: Leaving directory `/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/doc'
cd designer/ && ( test -e Makefile || /home/user/Qt5.6.0/5.6/gcc_64/bin/qmake /home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/designer/designer.pro -o Makefile ) && make -f Makefile 
make[1]: Entering directory `/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/designer'
compiling qwt_designer_plugin.cpp
In file included from qwt_designer_plugin.h:13:0,
                 from qwt_designer_plugin.cpp:23:
/home/user/Qt5.6.0/5.6/gcc_64/include/QtDesigner/QDesignerCustomWidgetInterface:4:4: warning: #warning Header <QtDesigner/QDesignerCustomWidgetInterface> is deprecated. Please include <QtUiPlugin/QDesignerCustomWidgetInterface> instead. [-Wcpp]
 #  warning Header <QtDesigner/QDesignerCustomWidgetInterface> is deprecated. Please include <QtUiPlugin/QDesignerCustomWidgetInte
    ^
compiling qwt_designer_plotdialog.cpp
rcc qwt_designer_plugin.qrc
compiling resources/qrc_qwt_designer_plugin.cpp
moc qwt_designer_plugin.h
compiling moc/moc_qwt_designer_plugin.cpp
In file included from moc/../qwt_designer_plugin.h:13:0,
                 from moc/moc_qwt_designer_plugin.cpp:9:
/home/user/Qt5.6.0/5.6/gcc_64/include/QtDesigner/QDesignerCustomWidgetInterface:4:4: warning: #warning Header <QtDesigner/QDesignerCustomWidgetInterface> is deprecated. Please include <QtUiPlugin/QDesignerCustomWidgetInterface> instead. [-Wcpp]
 #  warning Header <QtDesigner/QDesignerCustomWidgetInterface> is deprecated. Please include <QtUiPlugin/QDesignerCustomWidgetInte
    ^
moc qwt_designer_plotdialog.h
compiling moc/moc_qwt_designer_plotdialog.cpp
rm -f libqwt_designer_plugin.so
linking plugins/designer/libqwt_designer_plugin.so
/usr/bin/ld: skipping incompatible /home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/designer/../lib/libqwt.so when searching for -lqwt
/usr/bin/ld: cannot find -lqwt
collect2: error: ld returned 1 exit status
make[1]: *** [plugins/designer/libqwt_designer_plugin.so] Error 1
make[1]: Leaving directory `/home/user/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3/designer'
make: *** [sub-designer-make_first-ordered] Error 2
user@user-Inspiron-3558:~/Documents/Qwt/Qwt_forcharts_documents/qwt-6.1.3$

Thanks,

jsulm

@Pradeep-Kumar I just built version 6.1.3 on Linux without any issues. I don't know why you get a lib for ARM. Did you set any environment variables?

Pradeep Kumar

Nope i did not.
and by the way how did u build it. from where did u download?.

Thanks,

jsulm

@Pradeep-Kumar Downloaded it from the same location (qwt-6.1.3.tar.bz2). Did:

qwt $ mkdir build
qwt $ cd build
qwt $ ~/qt/5.8/gcc_64/bin/qmake ../qwt-6.1.3/qwt.pro
qwt $ make