link C libraries in omega2

Jasvivek Reehal

Below is a paragraph mentioned on the onion website page : Compiling C on the Omega

Library Header Availability

When the Omega’s OS is built, the header files for libraries that are not regularly part of the C standard library are not included as a space saving measure. If you take a look at /usr/lib, where the library shared object are kept and compare it to /usr/include, where the library header files are kept, you’ll see the discrepancy: some library objects do not have corresponding header files!

This includes libraries such as:

libugpio
libonioni2c
libonionpwmexp
libonionoledexp
libonionrelayexp
libuci
libubus
libjson-c
libiwinfo

i was not able to link the libonioni2c library with my main c++ program.
Kindly, provide me with proper steps for doing that.

Also, how to implement the linker command. I am new to all this.

Jasvivek Reehal

Any support guys??

Maximilian Gerhardt

I have recompiled and copied header files for multiple Onion2 relevant libraries here. Includes: libupgpio, libonioni2c, libonionmcp23008, libonionoledexp, libonionpwmexp, libonionrelayexp, liboniondebug, libalsa, libonionspi and two of my own libs. You can either cross-compile or locally compile the remaining libraries

Pavel Metrokhin

@Jasvivek-Reehal In order to use those libraries in your C/C++ code you need to cross-compile your program first using our build system. Please refer to our guide on how to setup the build system, how to compile C programs and how to actually cross-compile programs. You will find all the necessary steps and description. Also, check out our documentation to learn more about Library for Linker. I hope this will help!