Re: [Discuss-gnuradio] Qt installation

[Alexander Levedahl]

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?

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. 

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

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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