Open62541 (OPC UA in C) Build and Install on Linux (Part 1) 

Hi, you are welcome :) First I would ask myself the question, if I really need to build the library. If you just want to use the standard functionality, just use a prebuild version of the library. You can find it on the open62541's homepage in the downloads section. Just take the dll and the include files and you should be ready to go. If you have to build the library on windows, there is a short desribtion, how to do it here: open62541.org/doc/current/building.html (Section Building with CMake on Windows). I hope this will help you. But I won't do a video about it for several reasons (no offense, this is just my point of view ;) ): 1. On GNU/Linux you have a default compiler - the GNU Compiler Collections c-Compiler. On Windows I would not know, which compiler I should choose. The mingw or the proprietary Visual Studio Compiler. 2. I don't have a Windows 10 or a Visual Studio License. 3. I want to promote free and open source software on my channel. I want to show what you can do with FOSS only. All my videos are made with FOSS tools. Using windows would not be the best idea here. 4. I do this for fun and for me programming on GNU/Linux is more fun then on Windows ;)

Hello, Of course you can clone the repo to your Home directory. I used the tmp folder because after executing make install all the binaries and library files are were the system can find them. And I copy the oprn62541.c/.h Files to my Home directory. I dont need the sources any longer, so why saving them on the PC?

@@johannes4gnu_linux96 thank you. I fixed it.. could you do a video on multicast discovery, explaining how the scenario with an example? Would be really helpful.

The reason, why I did this, was because it was recommended by the tutorials back in the days, I did my videos. I use this option to get the open62541.c and open62541.h files. This makes it easier for me to get started, because I didn't need any library to compile my programs. But if I would redo the videos today, I would just use the shared libraries ;)

@@johannes4gnu_linux96 Thanks, that helps!

@@johannes4gnu_linux96 could you explain how to use the shared libraries? I couldn't find any information online on installing open62541 with ua_amalgamation=off, and just copying the header files from the open62541 repo into the project directory throws a bunch of errors. Thanks!

I used the shared library at the end of this video: m.ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-a_QNZQ2C9IE.html

@@johannes4gnu_linux96 Thank you for responding! I wasn't able to find the share, bin, and lib directories from the video you linked in the open62541 repo, is this method still working? I tried to build using the amalgamated version but I run into the error "implicit declaration of seCustomHostname." I read somewhere this can be solved using (config -> serverURL), but I'm not sure what this means. Any tips?

I think for Windows you can also build it with cmake. The steps are explained in the documentation of open62541: www.open62541.org/doc/master/building.html#building-the-library

@@johannes4gnu_linux96 Well I followed the documentation and with that there little server code does not work at all. Just unresolved externals.