Building/installing Qt-6.5.2 from source on ubuntu-22.04
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@SGaist
I am having below warning now....WARNING: No backend for low level audio found.
WARNING: QtWebEngine won't be built. Could not find all necessary libraries for qpa-xcb support. X11:YES LIBDRM:YES XCOMPOSITE:YES XCURSOR:YES XRANDR:YES XI:YES XPROTO:YES XSHMFENCE:NO XTST:YES
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@SGaist
I am having below warning now....WARNING: No backend for low level audio found.
WARNING: QtWebEngine won't be built. Could not find all necessary libraries for qpa-xcb support. X11:YES LIBDRM:YES XCOMPOSITE:YES XCURSOR:YES XRANDR:YES XI:YES XPROTO:YES XSHMFENCE:NO XTST:YES@prathyuch-1999 said in Building/installing Qt-6.5.2 from source on ubuntu-22.04:
XSHMFENCE:NO
Isn't this obvoius enough? Install the appropriate develpoment package if you need QtWebEngine
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@prathyuch-1999 said in Building/installing Qt-6.5.2 from source on ubuntu-22.04:
XSHMFENCE:NO
Isn't this obvoius enough? Install the appropriate develpoment package if you need QtWebEngine
@Christian-Ehrlicher
Thanks @Christian-Ehrlicher, i installed that package, now QtWebEngine warning is not there. -
@Christian-Ehrlicher
Thanks @Christian-Ehrlicher, i installed that package, now QtWebEngine warning is not there.@prathyuch-1999 said in Building/installing Qt-6.5.2 from source on ubuntu-22.04:
i installed that package, now QtWebEngine warning is not there.
What does 'is not there' means? Did configure warn about QtWebEngine missing dependencies? If not then it will also be built.
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@prathyuch-1999 said in Building/installing Qt-6.5.2 from source on ubuntu-22.04:
i installed that package, now QtWebEngine warning is not there.
What does 'is not there' means? Did configure warn about QtWebEngine missing dependencies? If not then it will also be built.
@Christian-Ehrlicher
Yes, now there is now warning of QtWebEngine at configure step.
But after successfully configured now i am getting following error related to gn, while doing next step (cmake --build . --parallel) screenshot of error is below :
Error Screenshot-2
Error Screenshot-3
Please suggest me what is the problem ?
How to remove this gn error ? -
@Christian-Ehrlicher
Yes, now there is now warning of QtWebEngine at configure step.
But after successfully configured now i am getting following error related to gn, while doing next step (cmake --build . --parallel) screenshot of error is below :
Error Screenshot-2
Error Screenshot-3
Please suggest me what is the problem ?
How to remove this gn error ?As you can see it's failing when looking for cups-config.
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As you can see it's failing when looking for cups-config.
@Christian-Ehrlicher
Thanks for your advice, i did same and now there is no warning of QtWebEngine at configure step.
But it was getting failed in next step with below error :
"c++: fatal error: Killed signal terminated program cc1plus"
I checked with dmesg, and found some out of memory things.
Even though i have 16GB of RAM, then I increased my swap size from 2 GB to 8GB.
Again did cmake....
But now, after some time terminal is getting crashed without any warning or error.
I checked with top command and found that some time cpu utilization is getting 85% to 100% by cc1plus and kswapd0.How to overcome this error ?
dmesg output:
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@Christian-Ehrlicher
Thanks for your advice, i did same and now there is no warning of QtWebEngine at configure step.
But it was getting failed in next step with below error :
"c++: fatal error: Killed signal terminated program cc1plus"
I checked with dmesg, and found some out of memory things.
Even though i have 16GB of RAM, then I increased my swap size from 2 GB to 8GB.
Again did cmake....
But now, after some time terminal is getting crashed without any warning or error.
I checked with top command and found that some time cpu utilization is getting 85% to 100% by cc1plus and kswapd0.How to overcome this error ?
dmesg output:
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@prathyuch-1999
I think you have to reduce the number of parallel builds/processes going on. There was a recent (last month?) thread to this effect, you might try to find it while awaiting a definitive answer.@JonB said in Building/installing Qt-6.5.2 from source on ubuntu-22.04:
There was a recent (last month?) thread to this effect,
Please share the link of above thread.
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@JonB said in Building/installing Qt-6.5.2 from source on ubuntu-22.04:
There was a recent (last month?) thread to this effect,
Please share the link of above thread.
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@JonB said in Building/installing Qt-6.5.2 from source on ubuntu-22.04:
There was a recent (last month?) thread to this effect,
Please share the link of above thread.
@prathyuch-1999 Simply add -j NUMBER_OF_BUILD_PROCESSES to your cmake --build call...
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@jsulm
I already did this also, i have 12 core processor so i added -j12 in cmake, but no solution. Same problem exists, terminal getting crashed.@prathyuch-1999 said in Building/installing Qt-6.5.2 from source on ubuntu-22.04:
@jsulm
I already did this also, i have 12 core processor so i added -j12 in cmake, but no solution. Same problem exists, terminal getting crashed.That is not reducing the number of threads ;-) Use
-j1or-j2, this will reduce RAM usage considerably. -
@prathyuch-1999 said in Building/installing Qt-6.5.2 from source on ubuntu-22.04:
@jsulm
I already did this also, i have 12 core processor so i added -j12 in cmake, but no solution. Same problem exists, terminal getting crashed.That is not reducing the number of threads ;-) Use
-j1or-j2, this will reduce RAM usage considerably. -
@sierdzio
It didn't worked, same problem.... system is getting stucked. -
@prathyuch-1999 are you building Qt under root? If yes, do not do it. You should build it under your user name and install it somewhere under root.
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@JoeCFD
Thanks for your advice, i tried to build as a user this time system is not stucked but doing cmake, build is getting failed at same position.
2nd screenshot
dmesg output
Looks like you need more RAM.
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@sierdzio
Hi,
I have RAM-16GB, 12 core processor and created swap of size 8GB ?
16GB RAM is not sufficient ? or what could be the problem ?@prathyuch-1999 said in Building/installing Qt-6.5.2 from source on ubuntu-22.04:
@sierdzio
Hi,
I have RAM-16GB, 12 core processor and created swap of size 8GB ?
16GB RAM is not sufficient ? or what could be the problem ?Well the compiler clearly tells you that it does not have enough memory. So perhaps yes, 16GB may be too small. I don't know for sure, I never compile the web engine module when I compile Qt.
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@prathyuch-1999 said in Building/installing Qt-6.5.2 from source on ubuntu-22.04:
@sierdzio
Hi,
I have RAM-16GB, 12 core processor and created swap of size 8GB ?
16GB RAM is not sufficient ? or what could be the problem ?Well the compiler clearly tells you that it does not have enough memory. So perhaps yes, 16GB may be too small. I don't know for sure, I never compile the web engine module when I compile Qt.
@sierdzio
I increased my swap size again and it worked for me.
Thanks to all of you for your advice, finally i have successfully build and install Qt-6.5.2 in my Ubuntu PC.
I have successfully build and install QtCreator-11.0.3 also.
But now QtCreator-11.0.3 is not working properly, whenever i will click on gui components in left panel, QtCreator is getting crashed with message in terminal "Segmentation fault (core dumped)".
I am not able to drag and drop or put any gui widget in form(.ui file) in qtcreator, it's getting crashed immediately just after click on that.
What could be the error ? How to resolve this issue.
