Hello,

Am Mittwoch, 7. Februar 2018, 00:02:52 CET schrieb t-v.k@gmx.net:

this is my first time on a mailing list. I'm not sure how this works.

You write to the list address, everyone also subscribed gets your mail, 
including you. Some people will set you in Cc additionally.

I'm currently trying to automate the build of a Linux kernel with the RT
PREEMPT patch. The kernel that I'm trying to build is in this git
repository: https://github.com/raspberrypi/linux (branch rpi-4.14.y)

It's the official kernel for the Raspberry Pi.

Yes, and it has some patches on top of the upstream vanilla kernel, IIRC 
around 200 the last time a looked at it.

But at the moment I am stuck. There are two problems. When I apply the
patch "patch-4.14.15-rt13.patch.gz", I get errors like:

Hunk #9 FAILED at 795.
...
1 out of 20 hunks FAILED -- saving rejects to file kernel/softirq.c.rej
...

and as a result of this it exits with code 1.

Here is the full build process output:
https://gitlab.com/T-vK/rpi-rt-kernel/-/jobs/51343435

When I just ignore it and continue I get to the point where I can run
"make zImage", which then fails with this:

This makes no sense, the patch must apply. You don't want to build anything 
with a half applied patch.

Can anyone help me with these issues?

If you're on v4.14 anyway, I would recommend to run a vanilla kernel and put 
the RT patch(es) on top. At least for a system without graphics, this should 
work. (I had a RPi 1B running with vanilla v4.12 built with ptxdist and the 
DistroKit BSP some time ago, v4.14 and v4.15 also run fine headless. Should 
also work for RPi 2.)

HTH & Greets
Alex