sdk/ndk/openSSL qt app Android

[Albator]

Hi, it's me again :)

I think this question has already been asked but I am not satisfied with my research I would like advice and explanation on the implementation of the development environment necessary to make applications.

i have read lot of doc and i found a few things

but I get stuck :(

I thought I'd figured out how to get out of it but as always a pangolin is trying to set me a trap...

Project ERROR: You need to set the ANDROID_NDK_ROOT environment variable to point to your Android NDK.
Could not read qmake configuration file C:/Qt/5.15.0/android/mkspecs/android-clang/qmake.conf.
Le chemin d'accŠs sp‚cifi‚ est introuvable.
2020-07-12T21:15:33 Clang Code Model: Error: The clangbackend process has finished unexpectedly and was restarted.

clarification on what is needed is welcome :)