Qwt-6.0.0-rc1

[Uwe]

I checked, and it worked. It compiled at once, and all header files are at the right place. No errors during the compilation of the examples and designer plugin.

Please one more check: is everything okay, when you build Qwt for debug and release ?

CONFIG           += debug_and_release
CONFIG           += build_all

CONFIG           += debug_and_release
CONFIG           += build_all

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I wanted to compile my application using "CONFIG += qwt", but I always got errors about missing headers, so obviously the qwt.prf file was not found by qmake. I checked the link that you posted some time ago (on how to make qmake know where the .prf file is), but setting "QMAKEFEATURES = /usr/local/qwt-6.0.0-svn/features" in my project file did not help.

This is a environment variable, so do "export QMAKEFEATURES = /usr/local/qwt-6.0.0-svn/features" in the shell ( assuming it is a bash ), where you execute qmake.

Or if you want to have it permanently you can set it as qmake property: "qmake -set QMAKEFEATURES /usr/local/qwt-6.0.0-svn/features".

Uwe

[mariposa]

Please one more check: is everything okay, when you build Qwt for debug and release ?

I checked, everything works fine.

This is a environment variable, so do "export QMAKEFEATURES = /usr/local/qwt-6.0.0-svn/features" in the shell ( assuming it is a bash ), where you execute qmake.

Or if you want to have it permanently you can set it as qmake property: "qmake -set QMAKEFEATURES /usr/local/qwt-6.0.0-svn/features".

Ah, many thanks, now it works using the "CONFIG += qwt" option

[msr]

Hello,

I installed qwt library and all the examples are built without problems.
However when I create a project I can't use Qwt.

I tried:
export QMAKEFEATURES = /usr/local/qwt-6.0.0/features
qmake -set QMAKEFEATURES /usr/local/qwt-6.0.0/features

The qwt.prf file is in the specified directory.

But when Im building the project I still get the error:

/home/mribeiro/Qt_Projects/QwtTest/qwttest: error while loading shared libraries: libqwt.so.6: cannot open shared object file: No such file or directory
/home/mribeiro/Qt_Projects/QwtTest/qwttest exited with code 127

The contens of .pro file are:

TARGET = qwttest
 
SOURCES += main.cpp \
    mainwindow.cpp \
    plot.cpp \
    curvedata.cpp \
    signaldata.cpp
HEADERS += mainwindow.h \
    plot.h \
    curvedata.h \
    signaldata.h
 
CONFIG += qwt

TARGET = qwttest

SOURCES += main.cpp \
    mainwindow.cpp \
    plot.cpp \
    curvedata.cpp \
    signaldata.cpp
HEADERS += mainwindow.h \
    plot.h \
    curvedata.h \
    signaldata.h

CONFIG += qwt

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What am I doing wrong?

[Im using Ubuntu 10.04]

[Uwe]

But when Im building the project I still get the error: ...

No you already have built your application successfully - these are error messages of the loader !

See LD_LIBRARY_PATH, ldd, ldconfig and friends.

Uwe

[msr]

Thanks for your response.

I tried the following:

export LD_LIBRARY_PATH=/usr/local/qwt-6.0.0/lib/
Edit file /etc/ld.so.conf and include "/usr/local/qwt-6.0.0/lib/"
Run ldconfig
Run ldconfig -n "/usr/local/qwt-6.0.0/lib"

None of them worked.

Any suggestions?

Im also reading http://tldp.org/HOWTO/Program-Librar...libraries.html and I think Im doing the right thing but it still doesn't work...

mribeiro@mribeiro-linux:/usr/local/lib/qwt-6.0.0/lib$ ls
libqwtmathml.so    libqwtmathml.so.6.0    libqwt.so    libqwt.so.6.0
libqwtmathml.so.6  libqwtmathml.so.6.0.0  libqwt.so.6  libqwt.so.6.0.0

mribeiro@mribeiro-linux:/usr/local/lib/qwt-6.0.0/lib$ ls
libqwtmathml.so    libqwtmathml.so.6.0    libqwt.so    libqwt.so.6.0
libqwtmathml.so.6  libqwtmathml.so.6.0.0  libqwt.so.6  libqwt.so.6.0.0

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Edit1:
Well, I copy-pasted libqwt.so.6 to /usr/lib and now it works. However I wonder how can I configure loader to search libraries in other directories. Any help is greatly appreciated!

Edit2: Done! For further reference: create a file "*.conf" (f.e., qwt.conf) in "/etc/ld.so.conf.d/" and add path "/usr/local/qwt-6.0.0/lib"