Kernel include directory

[alimodarresi]

Hi. I am following the https://github.com/open-switch/opx-build and building OPX for dell 4048ON. But in the installed OPX there is no include directory in kernel. actually kernel is not complete. I want to write a kernel module hello world and I can't do it. What I am missing here?

[gunasekaran-t]

@alimodarresi Generally header files are not included as part of installation. However any required package can be installed via apt.

For OPX compilation happens inside a docker and any dependency packages required to build a particular package should be mentioned as 'Build-Depends' in debian/control file. You can take a look at the existing opx repos for sample.

[alimodarresi]

@gunasekaran-t Can you give me a link of the headers that I have to install. I want to install it manually.
Thanks

[gunasekaran-t]

@alimodarresi you can do apt-get install linux-headers-$(uname -r). It will install linux header files for the current linux kernel version which is 4.9.110 for opx.

[alimodarresi]

Thanks @gunasekaran-t I have installed the headers by your help. Can you tell me which toolchain I can use to croos compile kernel module for OPX?
Or can you give me a guide on this topic?

[alimodarresi]

@gunasekaran-t and also where can I find kernel source for OPX?

[gunasekaran-t]

@alimodarresi easiest approach is to use docker for compilation. opx packages are built using opxhub/build docker image.

For linux kernel details you can refer https://github.com/open-switch/opx-linux-config