Newbie question regarding multimediawidgets missing issue

MichRX7

Here is a link that describes the Visual Studio process better after you install VisualGDB.
New VisualGDB Project setup

My guess is if I update QT on my Rpi and start a new project it will bring those items down. But for me, not being a Linux person, this process seems daunting.

SGaist

Thanks for the informations !

Which process do you find daunting ?

MichRX7

@SGaist What do I find daunting... anything to do with Linux and installing? :)

It just seems that any time I try and do something that should be simple in Linux it never works and I spend more time trying to get something to just work than actually using the tool.

Take for instance I thought that maybe it would be best if I took an old machine I had laying around and install Linux on it. Well, I was able to get that done and installed the newest build of Debian (because the Pi also runs a version of Debian), but then I spent half a day trying different items to get x11VNC on it (which I never did get working). I spent half my day searching what was going on, and why I was getting errors. About 4am my phone went bling from someone on another forums who said maybe it's Debian/Wayland.

Anyhow, to ease my frustration I decided to install QT from the website, and I did get that running on the linux pc. As I figured since others had been able to do the cross-compile that way, maybe that would be best for me. But when I tried to compile one of the sample projects, to test it, I get "The selected build of GDB does not support Python scripting. It cannot be used in QT Creator." Well, I wasn't doing any Python. So, now I have to try and resolve that.

Then I went on to try and get cross-compile working because I thought maybe if that was setup it wouldn't think I was doing Python (for whatever reason). I came across this wiki post and failed miserably around Step 10, so I found this blog post and again failed miserably right around where he talks about the wiki's step 10 (the configure/make area). Now in their defense I was trying to install the newest version of QT, 5.14.1, and switching up some of their commands. And now I don't know where to go next.

I know I'm doing a lot of griping, but if I could just get it to work I'd stop, because then I'd be writing code, lol...

JonB

@MichRX7 said in Newbie question regarding multimediawidgets missing issue:

I get "The selected build of GDB does not support Python scripting. It cannot be used in QT Creator." Well, I wasn't doing any Python. So, now I have to try and resolve that.

I don't know about your other issues, or whether cross-compiling is a good or bad idea. But for this one: Qt Creator itself does use Python (scripts) for its gdb debugging, and that may require a newish version of gdb/gcc package? Where did you get those from, what versions are they at?

MichRX7

@JonB said in Newbie question regarding multimediawidgets missing issue:

@MichRX7 said in Newbie question regarding multimediawidgets missing issue:

I get "The selected build of GDB does not support Python scripting. It cannot be used in QT Creator." Well, I wasn't doing any Python. So, now I have to try and resolve that.

I don't know about your other issues, or whether cross-compiling is a good or bad idea. But for this one: Qt Creator itself does use Python (scripts) for its gdb debugging, and that may require a newish version of gdb/gcc package? Where did you get those from, what versions are they at?

If I do a python --version from a terminal window it tells my it is Python 2.7.16

Do I have to tell QT Creator where to find it?

JonB

@MichRX7
That is old Python2. Linux ships with python command pointing to Python2, but python3 command to point to Python3.

I don't think you have to tell Qt Creator anything about Python. As I said, what you need to look at is what version of gdb you have/it is using. The implication of the error message is that it is the gdb which is not good.

See also e.g. http://sourceware.org/gdb/current/onlinedocs/gdb/Python.html. It says:

This feature is available only if GDB was configured using --with-python.

Maybe your gdb is not built with that.

I'm afraid this is all outside my experience.

MichRX7

So I should have installed a newer version of Python before installing QT? Why wouldn't QT tell me that before I installed it? Is there an "Installing QT Creator for Dummies" area that walks me through step-by-step what I should have done?

MichRX7

This is what is so frustrating. I have Python3, if I enter "python3 --version" it tells me I have Python 3.7.3

MichRX7

@JonB said in Newbie question regarding multimediawidgets missing issue:

@MichRX7
That is old Python2. Linux ships with python command pointing to Python2, but python3 command to point to Python3.

I don't think you have to tell Qt Creator anything about Python. As I said, what you need to look at is what version of gdb you have/it is using. The implication of the error message is that it is the gdb which is not good.

See also e.g. http://sourceware.org/gdb/current/onlinedocs/gdb/Python.html. It says:

This feature is available only if GDB was configured using --with-python.

Maybe your gdb is not built with that.

I'm afraid this is all outside my experience.

So, how do I get the gdb "which is good"?

MichRX7

Do I download this Linux file from here, edit the versions inside and run it somehow to make a working gdb?

I'd really like to actually build something inside QT Creator, lol...

SGaist

One way to check it gdb was built with python is to call ldd $(which gdb). It will list the libraries gdb is linked against and you should have the python library if gdb was built against it including the version of Python.

jsulm

@MichRX7 What Linux distribution and version do you actually use?

MichRX7

@SGaist said in Newbie question regarding multimediawidgets missing issue:

ldd $(which gdb)

ldd $(which gdb)
linux-gate.so.1 (0xb7f38000)
libreadline.so.7 => /lib/i386-linux-gnu/libreadline.so.7 (0xb77e7000)
libz.so.1 => /lib/i386-linux-gnu/libz.so.1 (0xb77c8000)
libtinfo.so.6 => /lib/i386-linux-gnu/libtinfo.so.6 (0xb779f000)
libdl.so.2 => /lib/i386-linux-gnu/libdl.so.2 (0xb7799000)
libexpat.so.1 => /lib/i386-linux-gnu/libexpat.so.1 (0xb775e000)
libipt.so.2 => /lib/i386-linux-gnu/libipt.so.2 (0xb773d000)
libm.so.6 => /lib/i386-linux-gnu/libm.so.6 (0xb7637000)
libc.so.6 => /lib/i386-linux-gnu/libc.so.6 (0xb7459000)
/lib/ld-linux.so.2 (0xb7f3a000)
libpthread.so.0 => /lib/i386-linux-gnu/libpthread.so.0 (0xb7438000)

MichRX7

@jsulm said in Newbie question regarding multimediawidgets missing issue:

@MichRX7 What Linux distribution and version do you actually use?

Debian GNU/Linux 10 (buster)
Running it on an old Dell Latitude D630 I found sitting in a box. :)

SGaist

Which version of gdb do you have ? I thought that the buster current version was built with python support.

MichRX7

@SGaist said in Newbie question regarding multimediawidgets missing issue:

Which version of gdb do you have ? I thought that the buster current version was built with python support.

gdb --version
GNU gdb (Debian 8.2.1-2+b3) 8.2.1

jsulm

@MichRX7 This site tells me that GDB on that Debian version uses Python: https://packages.debian.org/buster/gdb
Are you sure you installed the default gdb package?

MichRX7

@jsulm Unsure, on that box I installed QT and Creator direct from the download page. Unless I did something trying to follow the directions somewhere on how to cross-compile on a raspberry pi (unsuccessfully follow that is) I do not know.