How can I configure QT source code if it can't detect default installed OpenGl ES?

[UltraBurstXD]

I downloaded here: https://www.qt.io/offline-installers

[jsulm]

@UltraBurstXD As I said: offline installer is just one file. Make it executable (chmod u+x OFFLINE_INSTALLER_FILE) and execute it. No need to build anything.

[UltraBurstXD]

@jsulm I don't know name of offline installer... It's my first time using qt... perhaps should I specify qt modules path to qt creator? And configure the environment variables?

[jsulm]

@UltraBurstXD Lets do one step after another: you downloaded the offline installer, is that correct? Like http://download.qt.io/official_releases/qt/5.12/5.12.10/qt-opensource-linux-x64-5.12.10.run

[UltraBurstXD]

Yes, I did and extracted the files to home. As seen:

The archive name is qt-everywhere-src-5.15.2.tar.xz

[jsulm]

@UltraBurstXD You did NOT download the offline installer, you downloaded the source code. Can you please post the exact file name you downloaded?

[UltraBurstXD]

It turns out I downloaded Qt 5.15.x Source Packages... My internet data plan... And it can't configure because of OpenGL.

[jsulm]

@UltraBurstXD Didn't you want to install Qt using offline installer as @SGaist suggested? So, what do you want to do now? It is much much easier to install prebuild Qt than to build it by yourself. I suggest you use offline or (better) online installer to install prebuild Qt.

[SGaist]

Then lets go from scratch:

cd /somewhere_NOT_in_Qt_source
mkdir build_Qt
cd build_Qt
/path_to_Qt_sources/configure -nomake tests -nomake examples

What do you get now ?

[UltraBurstXD]

You cannot make a shadow build from a source tree containing a previous build.
Cannot proceed.

[SGaist]

I guess you kept the original archive, if so, just nuke the sources and extract them again. Then redo the procedure suggested above.

[UltraBurstXD]

New error:

Info: creating super cache file /home/USER/build_Qt/.qmake.super
Info: creating cache file /home/USER/build_Qt/.qmake.cache
ERROR: Unknown command line option '-nomake'.

[SGaist]

Please show the exact line you use.

[UltraBurstXD]

Which line?

~/qt_source/configure -nomake tests -nomake examples

That one?

[SGaist]

Wait, are you building from a git clone or from the source archives ?
Which version exactly are you trying to build ?

[UltraBurstXD]

macOS and Linux source archives. The version is 5.15.2 LTS. I'm trying to follow the instruction above.

[SGaist]

Where did you get the sources ?

[UltraBurstXD]

https://www.qt.io/offline-installers

[UltraBurstXD]

It doesn't accept any 'configure' options... Tried nearly all, the only it accepts is '-help' so far...

[SGaist]

And what does it show you in that case ?