oscilloscope in qt

[thippu]

@SGaist @VRonin I read this https://sourceforge.net/p/qtoscilloscope/code/HEAD/tree/trunk/INSTALL , they did n't tell where files : libfftw3 Fourier transformation library

libdwf		Digilent Waveform SDK for example version 3
+	

http://www.digilentinc.com/Products/Detail.cfm?NavPath=2,66,849&Prod=WAVEFORMS
http://www.digilentinc.com/Products/Detail.cfm?Prod=ADEPT2
to be placed?
and plz tell me where to be placed and
qmake is successful but when build it says : /usr/bin/ld: cannot find -ldwf
/usr/bin/ld: cannot find -lfftw3
plz help me what do

[SGaist]

Depends on your OS, for Debian install the package named libfftw3-dev

[thippu]

@SGaist but What about this error Bro:
error: cannot find -ldwf

[VRonin]

http://doc.qt.io/qt-5/third-party-libraries.html
http://doc.qt.io/qtcreator/creator-project-qmake-libraries.html

Basically you need to add tha path to dwf to your PATH enviromental variable

[thippu]

@SGaist , @VRonin bro I tried to add lib to Qt project still errors
plz help this is the last error :
o/p:
/usr/bin/ld: skipping incompatible /home/mmrfic/Downloads/digilent.waveforms_3.7.5_i386/usr/lib//libdwf.so when searching for -ldwf
Makefile:316: recipe for target 'qt-oscilloscope' failed
/usr/bin/ld: cannot find -ldwf
collect2: error: ld returned 1 exit status
make: *** [qt-oscilloscope] Error 1
14:36:13: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project qt-oscilloscope (kit: Desktop Qt 5.9.0 GCC 64bit)
When executing step "Make"

[VRonin]

@VRonin said in oscilloscope in qt:

Basically you need to add tha path to dwf to your PATH enviromental variable

[thippu]

@VRonin Does environment variable have to be -ldwf? or just dwf?

[VRonin]

@thippu Ok, let's take a different approach. See in http://doc.qt.io/qt-5/third-party-libraries.html the part where it says LIBS += -L"3rdparty/CatWhisperer/lib" -lCatWhisperer?
Your program will probably just have something like LIBS += ldwf so you need to ass the -L part in front of it

[thippu]

@VRonin Do I have to open terminal and use export command to set system enviornment variable in ubuntu?

[thippu]

@thippu like that or in side Qt itself?

[thippu]

@VRonin , @SGaist this qmake I have changed plz tell this right or not?
qmake file:

# Automatically generated by qmake (2.01a) Sat Dec 13 16:33:29 2014
######################################################################
QT       += core gui widgets serialport multimedia multimediawidgets printsupport datavisualization charts

TEMPLATE = app
TARGET = qt-oscilloscope
DEPENDPATH += .
INCLUDEPATH += .
INCLUDEPATH += /usr/local/include/digilent/waveforms
INCLUDEPATH += /usr/include/digilent/waveforms
INCLUDEPATH +=/home/mmrfic/Desktop/qt-oscilloscope-1.0
CONFIG += qt


LIBS +=-l "digilent.waveforms_3.7.5_i386/usr/lib" -ldwf

LIBS+=-lfftw3

# Input
HEADERS += Horizontal.hh MainWindow.hh Trigger.hh Tube.hh Vertical.hh
HEADERS += Color.hh Color.def file.def Cursor.hh Device.hh State.hh
HEADERS += Wavegen.hh FftWindow.hh Analog_Discovery.hh Dummy_Device.hh

SOURCES += Horizontal.cc main.cc MainWindow.cc Trigger.cc Tube.cc Vertical.cc
SOURCES += Color.cc Cursor.cc State.cc Wavegen.cc Common.cc
SOURCES += FftWindow.cc Analog_Discovery.cc Dummy_Device.cc ```

[VRonin]

• -l "digilent.waveforms_3.7.5_i386/usr/lib" should be -L"digilent.waveforms_3.7.5_i386/usr/lib"
• does "digilent.waveforms_3.7.5_i386/usr/lib" contain a file called dwf.lib or dwf.a (sorry I don't remember the estension of gcc libraries)?
• You probably have to do the same for -lfftw3

[thippu]

@VRonin said in oscilloscope in qt:

• -l "digilent.waveforms_3.7.5_i386/usr/lib" should be -L"digilent.waveforms_3.7.5_i386/usr/lib"
  changes made,but again same error

[thippu]

@VRonin said in oscilloscope in qt:

• does "digilent.waveforms_3.7.5_i386/usr/libcontain a file calleddwf.libordwf.a` (sorry I don't remember the estension of gcc libraries)?
  yes, It has file dwf.h
  will that okay bro?

• You probably have to do the same for -lfftw3
  -lfftw3 working fine bro

[VRonin]

@thippu said in oscilloscope in qt:

yes, It has file dwf.h

Nope. it must be a compiled binary, not a header

[thippu]

@VRonin Bro Is libdwf.so are complied binary?

[VRonin]

yes so you have to change -ldwf to -llibdwf also

[aha_1980]

@VRonin

yes so you have to change -ldwf to -llibdwf also

Nope. If you want to link against library libxyz.so, the linker line is `-lxyz'.

Example: the math library libm.so is linked with -lm.

Don't ask me who invented this...

[thippu]

@aha_1980 , @VRonin , @SGaist Guys thank you!
Whatever u said I did,I'm sorry to say this,Not executing still.
Idk what do,paths are working,lib exists, but not executing why?! :(
If you try this on u r machine letme know if it works link:
https://sourceforge.net/projects/qtoscilloscope/

[aha_1980]

@thippu

so what is your exact problem? is it a compiler/linker error: then please post the error.

otherwise do a ldd <program> to list the dependencies (replace <program> with the final executables name) and post that.