Project ERROR: You need to set the ANDROID_NDK_ROOT environment variable to point to your Android NDK.

20Stefan05 · wrote on 27 May 2020, 15:01

Hello! I am trying to install the mqtt module to android_armv7. To do this, I create a folder named build and run this: ~/Qt/5.12.4/android_armv7/bin/qmake qmake -r ... Unfortunately I recieve this error:

Project ERROR: You need to set the ANDROID_NDK_ROOT environment variable to point to your Android NDK.
Could not read qmake configuration file /home/stefan/Qt/5.12.4/android_armv7/mkspecs/android-clang/qmake.conf.
Error processing project file: ../qtmqtt.pro

I have tried going to tools->External->Configure->Environment->External Tools->Update Translations and wrote:
ANDROID_NDK_ROOT=/home/stefan/Downloads/android-ndk-r19c/android-ndk-r19c
PATH=
in the Environment Change section. It didn't work. A strange thing (for me) is that I can deploy an application (without mqtt) on android_armv7. I am using Linux. What should I do now?

SGaist · 29 May 2020, 12:40

Hi,

It looks like you are trying to do that in a terminal and modify settings in an application. What exactly are you doing ?

Since you have it working in Qt Creator as it seems, just define these environment variable for the terminal you want to build qtmqtt in.

Quang Phu · wrote on 28 May 2020, 05:32

@20Stefan05 ,

If you want to install mqtt module, you have to install it inside lib of android, and they will make for all architecture.
You can refer this link to install it.
https://forum.qt.io/topic/107020/how-to-use-mqtt-client-class-in-qml/9

20Stefan05 · 29 May 2020, 13:03

@SGaist said in Project ERROR: You need to set the ANDROID_NDK_ROOT environment variable to point to your Android NDK.:

Hi,

It looks like you are trying to do that in a terminal and modify settings in an application. What exactly are you doing ?

Since you have it working in Qt Creator as it seems, just define these environment variable for the terminal you want to build qtmqtt in.

Hi and thank you for the reply. It works in the Qt Creator, but only for gcc_64. How should I define the environment variables?

jsulm · 29 May 2020, 13:35

@20Stefan05 said in Project ERROR: You need to set the ANDROID_NDK_ROOT environment variable to point to your Android NDK.:

How should I define the environment variables?

In the same way they are set in Build Environment in QtCreator: "Projects/Build & Run/Build/Build Environment".

20Stefan05 · J jsulm 29 May 2020, 13:03

@jsulm Thank you! But the ANDROID_NDK_ROOT variable points my Android NDK.

SGaist · 29 May 2020, 18:50

In your terminal ?

20Stefan05 · S SGaist 29 May 2020, 17:57

@SGaist
Here.

SGaist · 29 May 2020, 20:22

Well... that's Qt Creator. You have to set them in the terminal you are using to build the module.

20Stefan05 · 29 May 2020, 20:40

@SGaist But I don't know how to do it. Could you help me?

mrjj · 29 May 2020, 20:41

@20Stefan05
Hi
https://www.serverlab.ca/tutorials/linux/administration-linux/how-to-set-environment-variables-in-linux/

so try
export ANDROID_NDK_ROOT=/home/stefan/Downloads/android-ndk-r19c/android-ndk-r19c
in the terminal

20Stefan05 · M mrjj 29 May 2020, 20:40

@mrjj Thank you!

Sudhir Khanger · 31 May 2020, 10:18

Does Qt 5.15.0 works with ndk side-by-side? I have ndk version 21.2.6472646 installed via Android Studio. Qt Creator keeps wanting me to install 21.2.63xxxxx version.

Where can I find which Qt version requires which NDK version?

mrjj · 2 Jun 2020, 17:53

@Sudhir-Khanger

Hi
Here
https://doc.qt.io/qt-5/android-getting-started.html

Qt 5.14.0 or later, Qt 5.13.2 or later, and Qt 5.12.6 or later
NDK r20b or r21
android-clang
Note: Qt 5.14.0 and 5.14.1 with NDK r21 have a bug fixed at QTBUG-81461.

Qt 5.12.0 to 5.12.5 and Qt 5.13.0 to 5.13.1
NDK r19c
android-clang
Qt 5.11 and below
NDK r10e
GCC toolchain

Sudhir Khanger · M mrjj 31 May 2020, 10:18

@mrjj said in Project ERROR: You need to set the ANDROID_NDK_ROOT environment variable to point to your Android NDK.:

@Sudhir-Khanger

Hi
Here
https://doc.qt.io/qt-5/android-getting-started.html

Qt 5.14.0 or later, Qt 5.13.2 or later, and Qt 5.12.6 or later
NDK r20b or r21
android-clang
Note: Qt 5.14.0 and 5.14.1 with NDK r21 have a bug fixed at QTBUG-81461.

Qt 5.12.0 to 5.12.5 and Qt 5.13.0 to 5.13.1
NDK r19c
android-clang
Qt 5.11 and below
NDK r10e
GCC toolchain

There is no version r21. There's a version 21c which seems to have issue with Qt 5.15.0

https://developer.android.com/ndk/downloads/revision_history

Sudhir Khanger · 19 Jul 2020, 07:38

This is a bit problematic. There is no mention of r21 on NDK Revision History or NDK Downloads or Unsupported NDK Downloads. Qt should try to support the latest NDK which would be r21d.