How to build MQTT for android devices?

[Quang Phu]

Hi all,
I am devlop an app use MQTT protocol to communicate server.
First I build and run MQTT on desktop OK.
Then, I tried to build with android device, I got errors mqtt module is unknown. Then I tried to build mqtt for android as desktop way, but when I run program, It had error

So I just wonder how to build MQTT correctly for Android?

Info:

• Qt: 5.13.0
• OS: Ubuntu 18.04
• Project target: Android x86
• NDK: r20

[Pablo J. Rogina]

@quang-phu said in How to build MQTT for android devices?:

o I just wonder how to build MQTT correctly for Android?

I guess that you need to follow the same procedure you did for building the module for Desktop, this time using the compiler/tools from the NDK

[Quang Phu]

Hi @Pablo-J-Rogina,

I tried again, built as the procedure of Desktop one, there is an error:

cannot find -lc++

and this was fixed by adding -nostdlib++ into .../Qt5.13.0/5.13.0/android_x86/mkspecs/android-clang/qmake.conf as
https://codereview.qt-project.org/c/qt/qtbase/+/264903/9/mkspecs/android-clang/qmake.conf#34
Then building was successful, and it works now. I will mark this issue be resolved.
Thank for your help :)