I cannot use Qwt

[8Observer8]

Hello, Everyone!

I installed qwt-6.0.2:

qmake
mingw32-make

With the file 'qwtconfig.pri':

################################################################
# Qwt Widget Library
# Copyright (C) 1997   Josef Wilgen
# Copyright (C) 2002   Uwe Rathmann
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the Qwt License, Version 1.0
################################################################
 
QWT_VER_MAJ      = 6
QWT_VER_MIN      = 0
QWT_VER_PAT      = 2
QWT_VERSION      = $${QWT_VER_MAJ}.$${QWT_VER_MIN}.$${QWT_VER_PAT}
 
######################################################################
# Install paths
######################################################################
 
QWT_INSTALL_PREFIX = $$[QT_INSTALL_PREFIX]
 
unix {
    QWT_INSTALL_PREFIX    = /usr/local/qwt-$$QWT_VERSION
}
 
win32 {
    QWT_INSTALL_PREFIX    = C:/Qwt-$$QWT_VERSION
}
 
QWT_INSTALL_DOCS      = $${QWT_INSTALL_PREFIX}/doc
QWT_INSTALL_HEADERS   = $${QWT_INSTALL_PREFIX}/include
QWT_INSTALL_LIBS      = $${QWT_INSTALL_PREFIX}/lib
 
######################################################################
# Designer plugin
######################################################################
 
QWT_INSTALL_PLUGINS   = $${QWT_INSTALL_PREFIX}/plugins/designer
# QWT_INSTALL_PLUGINS   = $${QT_INSTALL_PREFIX}/plugins/designer
 
######################################################################
# Features
# When building a Qwt application with qmake you might want to load
# the compiler/linker flags, that are required to build a Qwt application
# from qwt.prf. Therefore all you need to do is to add "CONFIG += qwt" 
# to your project file and take care, that qwt.prf can be found by qmake.
# ( see http://doc.trolltech.com/4.7/qmake-advanced-usage.html#adding-new-configuration-features )
# I recommend not to install the Qwt features together with the
# Qt features, because you will have to reinstall the Qwt features,
# with every Qt upgrade. 
######################################################################
 
QWT_INSTALL_FEATURES  = $${QWT_INSTALL_PREFIX}/features
# QWT_INSTALL_FEATURES  = $${QT_INSTALL_PREFIX}/features
 
######################################################################
# qmake internal options
######################################################################
 
CONFIG           += qt     # Also for Qtopia Core!
CONFIG           += warn_on
CONFIG           += thread
CONFIG           += silent
 
win32 {
    # On Windows you can't mix release and debug libraries.
    # The designer is built in release mode. If you like to use it
    # you need a release version. For your own application development you
    # might need a debug version. 
    # Enable debug_and_release + build_all if you want to build both.
 
    #CONFIG           += release     # release/debug/debug_and_release
    CONFIG           += debug_and_release
    #CONFIG           += build_all
}
 
######################################################################
# Build the static/shared libraries.
# If QwtDll is enabled, a shared library is built, otherwise
# it will be a static library.
######################################################################
 
#QWT_CONFIG           += QwtDll
 
######################################################################
# QwtPlot enables all classes, that are needed to use the QwtPlot 
# widget. 
######################################################################
 
QWT_CONFIG       += QwtPlot
 
######################################################################
# QwtWidgets enables all classes, that are needed to use the all other
# widgets (sliders, dials, ...), beside QwtPlot. 
######################################################################
 
QWT_CONFIG     += QwtWidgets
 
######################################################################
# If you want to display svg images on the plot canvas, or
# export a plot to a SVG document
######################################################################
 
QWT_CONFIG     += QwtSvg
 
######################################################################
# You can use the MathML renderer of the Qt solutions package to 
# enable MathML support in Qwt. Because of license implications
# the ( modified ) code of the MML Widget solution is included and
# linked together with the QwtMathMLTextEngine into an own library. 
# To use it you will have to add "CONFIG += qwtmathml"
# to your qmake project file.
######################################################################
 
QWT_CONFIG     += QwtMathML
 
######################################################################
# If you want to build the Qwt designer plugin, 
# enable the line below.
# Otherwise you have to build it from the designer directory.
######################################################################
 
QWT_CONFIG     += QwtDesigner
 
######################################################################
# If you want to auto build the examples, enable the line below
# Otherwise you have to build them from the examples directory.
######################################################################
 
# QWT_CONFIG     += QwtExamples
 
######################################################################
# When Qt has been built as framework qmake ( qtAddLibrary ) wants 
# to link frameworks instead of regular libs
######################################################################
 
macx:CONFIG(qt_framework, qt_framework|qt_no_framework) {
 
    QWT_CONFIG += QwtFramework
}

################################################################
# Qwt Widget Library
# Copyright (C) 1997   Josef Wilgen
# Copyright (C) 2002   Uwe Rathmann
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the Qwt License, Version 1.0
################################################################

QWT_VER_MAJ      = 6
QWT_VER_MIN      = 0
QWT_VER_PAT      = 2
QWT_VERSION      = $${QWT_VER_MAJ}.$${QWT_VER_MIN}.$${QWT_VER_PAT}

######################################################################
# Install paths
######################################################################

QWT_INSTALL_PREFIX = $$[QT_INSTALL_PREFIX]

unix {
    QWT_INSTALL_PREFIX    = /usr/local/qwt-$$QWT_VERSION
}

win32 {
    QWT_INSTALL_PREFIX    = C:/Qwt-$$QWT_VERSION
}

QWT_INSTALL_DOCS      = $${QWT_INSTALL_PREFIX}/doc
QWT_INSTALL_HEADERS   = $${QWT_INSTALL_PREFIX}/include
QWT_INSTALL_LIBS      = $${QWT_INSTALL_PREFIX}/lib

######################################################################
# Designer plugin
######################################################################

QWT_INSTALL_PLUGINS   = $${QWT_INSTALL_PREFIX}/plugins/designer
# QWT_INSTALL_PLUGINS   = $${QT_INSTALL_PREFIX}/plugins/designer

######################################################################
# Features
# When building a Qwt application with qmake you might want to load
# the compiler/linker flags, that are required to build a Qwt application
# from qwt.prf. Therefore all you need to do is to add "CONFIG += qwt" 
# to your project file and take care, that qwt.prf can be found by qmake.
# ( see http://doc.trolltech.com/4.7/qmake-advanced-usage.html#adding-new-configuration-features )
# I recommend not to install the Qwt features together with the
# Qt features, because you will have to reinstall the Qwt features,
# with every Qt upgrade. 
######################################################################

QWT_INSTALL_FEATURES  = $${QWT_INSTALL_PREFIX}/features
# QWT_INSTALL_FEATURES  = $${QT_INSTALL_PREFIX}/features

######################################################################
# qmake internal options
######################################################################

CONFIG           += qt     # Also for Qtopia Core!
CONFIG           += warn_on
CONFIG           += thread
CONFIG           += silent

win32 {
    # On Windows you can't mix release and debug libraries.
    # The designer is built in release mode. If you like to use it
    # you need a release version. For your own application development you
    # might need a debug version. 
    # Enable debug_and_release + build_all if you want to build both.

    #CONFIG           += release     # release/debug/debug_and_release
    CONFIG           += debug_and_release
    #CONFIG           += build_all
}

######################################################################
# Build the static/shared libraries.
# If QwtDll is enabled, a shared library is built, otherwise
# it will be a static library.
######################################################################

#QWT_CONFIG           += QwtDll

######################################################################
# QwtPlot enables all classes, that are needed to use the QwtPlot 
# widget. 
######################################################################

QWT_CONFIG       += QwtPlot

######################################################################
# QwtWidgets enables all classes, that are needed to use the all other
# widgets (sliders, dials, ...), beside QwtPlot. 
######################################################################

QWT_CONFIG     += QwtWidgets

######################################################################
# If you want to display svg images on the plot canvas, or
# export a plot to a SVG document
######################################################################

QWT_CONFIG     += QwtSvg

######################################################################
# You can use the MathML renderer of the Qt solutions package to 
# enable MathML support in Qwt. Because of license implications
# the ( modified ) code of the MML Widget solution is included and
# linked together with the QwtMathMLTextEngine into an own library. 
# To use it you will have to add "CONFIG += qwtmathml"
# to your qmake project file.
######################################################################

QWT_CONFIG     += QwtMathML

######################################################################
# If you want to build the Qwt designer plugin, 
# enable the line below.
# Otherwise you have to build it from the designer directory.
######################################################################

QWT_CONFIG     += QwtDesigner

######################################################################
# If you want to auto build the examples, enable the line below
# Otherwise you have to build them from the examples directory.
######################################################################

# QWT_CONFIG     += QwtExamples

######################################################################
# When Qt has been built as framework qmake ( qtAddLibrary ) wants 
# to link frameworks instead of regular libs
######################################################################

macx:CONFIG(qt_framework, qt_framework|qt_no_framework) {

    QWT_CONFIG += QwtFramework
}

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I went in the directory 'c:\qt\qwt-6.0.2\examples\bode\'

And I changed the file 'bode.pro':

################################################################
# Qwt Widget Library
# Copyright (C) 1997   Josef Wilgen
# Copyright (C) 2002   Uwe Rathmann
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the Qwt License, Version 1.0
################################################################
 
include( $${PWD}/../examples.pri )
 
TARGET       = bode
 
HEADERS = \
    mainwindow.h \
    plot.h \
    complexnumber.h \ 
    pixmaps.h
 
SOURCES = \
    plot.cpp \
    mainwindow.cpp \
    main.cpp
 
QWT_LOCATION = c:\qt\qwt-6.0.2
INCLUDEPATH += $${QWT_LOCATION}/src
LIBS = -L$${QWT_LOCATION}/lib \
     -lqwt
 
if(!debug_and_release|build_pass):CONFIG(debug, debug|release) { 
    win32:LIBS = $$member(LIBS, 0) \
        $$member(LIBS, 1)d
}

################################################################
# Qwt Widget Library
# Copyright (C) 1997   Josef Wilgen
# Copyright (C) 2002   Uwe Rathmann
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the Qwt License, Version 1.0
################################################################

include( $${PWD}/../examples.pri )

TARGET       = bode

HEADERS = \
    mainwindow.h \
    plot.h \
    complexnumber.h \ 
    pixmaps.h

SOURCES = \
    plot.cpp \
    mainwindow.cpp \
    main.cpp

QWT_LOCATION = c:\qt\qwt-6.0.2
INCLUDEPATH += $${QWT_LOCATION}/src
LIBS = -L$${QWT_LOCATION}/lib \
     -lqwt

if(!debug_and_release|build_pass):CONFIG(debug, debug|release) { 
    win32:LIBS = $$member(LIBS, 0) \
        $$member(LIBS, 1)d
}

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I wrote two commands:

qmake -o Makefile bode.pro
mingw32-make

I saw the file with the extension '.o'. But I did not see the file 'bode.exe'

Output:

C:\qt\qwt-6.0.2\examples\bode>qmake -o Makefile bode.pro
WARNING: c:\qt\qwt-6.0.2\examples\bode\bode.pro:25: Unescaped backslashes are deprecated.
WARNING: c:\qt\qwt-6.0.2\examples\bode\bode.pro:25: Unescaped backslashes are deprecated.
WARNING: c:\qt\qwt-6.0.2\examples\bode\bode.pro:25: Unescaped backslashes are deprecated.
 
C:\qt\qwt-6.0.2\examples\bode>mingw32-make
C:/MinGW/bin/mingw32-make.EXE -f Makefile.Debug all
mingw32-make.EXE[1]: Entering directory `C:/qt/qwt-6.0.2/examples/bode'
compiling plot.cpp
compiling mainwindow.cpp
compiling main.cpp
moc mainwindow.h
compiling moc/moc_mainwindow.cpp
moc plot.h
compiling moc/moc_plot.cpp
linking ..\bin\bode.exe
mingw32-make.EXE[1]: Leaving directory `C:/qt/qwt-6.0.2/examples/bode'
C:/MinGW/bin/mingw32-make.EXE -f Makefile.Release all
mingw32-make.EXE[1]: Entering directory `C:/qt/qwt-6.0.2/examples/bode'
compiling plot.cpp
compiling mainwindow.cpp
compiling main.cpp
compiling moc/moc_mainwindow.cpp
compiling moc/moc_plot.cpp
linking ..\bin\bode.exe
mingw32-make.EXE[1]: Leaving directory `C:/qt/qwt-6.0.2/examples/bode'

C:\qt\qwt-6.0.2\examples\bode>qmake -o Makefile bode.pro
WARNING: c:\qt\qwt-6.0.2\examples\bode\bode.pro:25: Unescaped backslashes are deprecated.
WARNING: c:\qt\qwt-6.0.2\examples\bode\bode.pro:25: Unescaped backslashes are deprecated.
WARNING: c:\qt\qwt-6.0.2\examples\bode\bode.pro:25: Unescaped backslashes are deprecated.

C:\qt\qwt-6.0.2\examples\bode>mingw32-make
C:/MinGW/bin/mingw32-make.EXE -f Makefile.Debug all
mingw32-make.EXE[1]: Entering directory `C:/qt/qwt-6.0.2/examples/bode'
compiling plot.cpp
compiling mainwindow.cpp
compiling main.cpp
moc mainwindow.h
compiling moc/moc_mainwindow.cpp
moc plot.h
compiling moc/moc_plot.cpp
linking ..\bin\bode.exe
mingw32-make.EXE[1]: Leaving directory `C:/qt/qwt-6.0.2/examples/bode'
C:/MinGW/bin/mingw32-make.EXE -f Makefile.Release all
mingw32-make.EXE[1]: Entering directory `C:/qt/qwt-6.0.2/examples/bode'
compiling plot.cpp
compiling mainwindow.cpp
compiling main.cpp
compiling moc/moc_mainwindow.cpp
compiling moc/moc_plot.cpp
linking ..\bin\bode.exe
mingw32-make.EXE[1]: Leaving directory `C:/qt/qwt-6.0.2/examples/bode'

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Thanks!

Ivan

[Uwe]

I installed qwt-6.0.2:

All you did is to build Qwt, it is not installed !.

A proper installation always ends with:

mingw32-make install

mingw32-make install

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The project files for building the Qwt examples are completely different to the project files of an application. Better throw away what you did so far.

• When you want to check the examples use the project files as they are. All you need to do is to set the PATH variable, so that the lib and examples/bin directories ( read the line "linking" in the output you have posted ) are found.
• For building an application configure qmake, so that it finds qwt.prf where you have Qwt installed: see https://qt-project.org/doc/qt-4.8/qm...ation-features.
  
  I prefer to use option 2 using the QMAKEFEATURES property:

  qmake -set QMAKEFEATURES "C:/Qwt-6.0/features:..."

  qmake -set QMAKEFEATURES "C:/Qwt-6.0/features:..."

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  Then simply add the following line to your project file:
  

  CONFIG += qwt

  CONFIG += qwt

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When it is a new project I recommend to start with Qwt 6.1.

Uwe

[8Observer8]

Thank you very much!

Yes, I found the file 'bode.exe' in the directory 'C:\qt\qwt-6.0.2\examples\bin'

What will be happened when I will install the Qwt? I can get the file '.exe' without the installation of the Qwt (without: mingw32-make install)

Your reply is very useful for me. I am studying the documentation of the qmake now.

[Uwe]

What will be happened when I will install the Qwt?

No reason for being afraid of something - your system won't be modified in any way beside that Qwt copies some files in a proper way below the directory you have configured in qwtconfig.pri. After removing the directory your system is in the same state as before.

Running into problems because of not doing this step makes absolutely no sense.

Uwe

[8Observer8]

Thanks!

Ivan