Re: [Discuss-gnuradio] Qt installation

[Tom Rondeau]

On Thu, Mar 31, 2016 at 12:00 PM, Alexander Levedahl <address@hidden> wrote:

Hello,

The OS is RHEL6.5.  I have to download and install packages manually.  This is not something I can get around. 

The GnuRadio version is 3.7.9.1.  I am trying to upgrade our version of gnuradio.  We have a GUI that I have to make extensive modifications to and decided to switch from Wx to Qt since that is the recommended path going forward.

pkg-config does not report anything for qwt.  Does the line find_package(Qwt) in the gr-qtgui/CMakeLists.txt check the pkg-config list?

No, QWT does not install a .pc file (and I've no idea why they won't).

 

Currently I have qwt6.1.2 installed.  The directory qwt-6.1.2 was installed in /usr/local/lib64/.  There is a shared object in there.  I made a symlink to one of them from a directory in LD_LIBRARY_PATH. 

Do you have the devel package installed, too? That is, the header files in /usr/local/include? You can try to add this to the cmake command line to force them to be found:

-DQWT_LIBRARIES=/usr/local/lib64/libqwt.so

-DQWT_INCLUDE_DIRS=/usr/local/include

(I'm assuming that's the correct include path based on your library path.)

 

At the moment, I think I will hold off on installing PyQwt since it is unnecessary per Tom, and I do not need it. 

Yes, don't worry about that.

Final thought. Have you tried to install GNU Radio using PyBOMBS? I know the original PyBOMBS worked fine on older RedHat installations, though I'm not positive that anyone's tried the new version on it.

Tom

 

Thanks,

Alex

On Thu, Mar 31, 2016 at 9:44 AM, Tom Rondeau <address@hidden> wrote:

On Thu, Mar 31, 2016 at 9:40 AM, Marcus Müller <address@hidden> wrote:

Hi Alex,

yes, Qwt is necessary; what OS are you on?
Qwt is kind of a problem child; we need Qwt-qt4, in a version somewhere between 5.2 and 6.2.0.

If you're on Linux (which distro?), what does

pkg-config --list-all|grep -i qwt 

tell you¹?

When do you get that error, and could you share it with a bit of context in verbatim?

Best regards,
Marcus

¹ Mine tells me there's

qwt5-qt4                            qwt5-qt4 - Qt Widgets for Technical Applications
qwt                                 Qwt6 - Qt Widgets for Technical Applications
qwtmathml                           qwtmathml - Qwt MathML renderer

Yes, QWT is required, but PyQWT is no longer necessary. What version of GNU Radio are you trying to build?

The gr_filter_design tool still uses PyQWT, so you won't be able to run that, but gr-qtgui can be built and run fine without it.

Tom

 

On 31.03.2016 15:31, Alexander Levedahl wrote:

Hello,

I was able to install PyQt.  When I attempted to build gnuradio, it complained that it could not find PyQwt and refused to build the gr-qtgui component.  The gnuradio website gives the impression it is not necessary.  When I attempted to install Qwt, I got an error QT_STATIC_CONST.  I believe that is a necessary step to installing PyQwt. 

Is PyQwt necessary to install the gr-qtgui component?  If so, has anyone experienced this issue before?

Thanks,

Alex

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