Hi,
I am using RUT240 as IoT Router and want to receive MQTT message from Azure IoT Hub. For that reason, I use Azure IoT Hub C SDK from Microsoft. I am totally a newbie with OpenWrt and therefore, I started with "Hello world" for OpenWrt and did it successfully.
But for complicated library like Azure IoT Hub C SDK, I did the same steps and receive error:
Thanks in advance.
If it's a shared library, and you want to do it "right", you need to package it separately and then add it as a dependency to your project.
Thank you andyboeh but I don't get your idea. Do you mean, I should create binary file (*.ipk) of every single library and install it?
I created a binary file from the example of Azure for Debian without package library to binary file. So, I guess for OpenWrt it should work the same.
If it's a shared library, then yes. Other packages can then depend on it, reducing the needed space. I don't know if that's possible or wanted with your particular application.
I use the library for my particular application, no more than that. So it is better, if all the library and application stay in one binary file. 
OK, so it's not a shared library 
Then you need to edit the Makefile or CMakeLists.txt to build all required source files.
Yes, that is my question. How could all the library be included in Makefile or CMakeLists.txt? I mean, I did the "helloworld" example but they didn't use any lib.
In this case you just add the individual source files. This is standard software project management and not OpenWrt-specific. Please research how to add new source files to a project.
