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In order to compile the RTLinux kernel, first you need to download the kernel for which RTLinux was built. To do so, note that there are patches in the top-level directory by the name kernel_patch*. For RTLinux 3.1, these files are:
Where:
Please make sure you have all software required to run the specific kernel version. This information can be found in Documentation/Changes file in the kernel tree.
In particular, RedHat 7.0 and 7.1 systems tend to have problems with compiling RTLinux 2.4.x kernels because of wrong gcc versions in these distributions. If you use a 2.4.x kernel on a recent RedHat system, you need to change the
CC = $(CROSS_COMPILE)gccin the Linux kernel Makefile to
CC = kgcc
OR, if you're using a 2.4.xx kernel:
Enabling APM support is not recommended. APM BIOS calls may have unpredictable effect on real-time performance.
On Alpha machines, you need to enable RTLinux Support (CONFIG_RTLINUX). On i386 and PPC, this is done automatically.
Please make sure to specify the correct CPU type for the target machine.
Install the Linux kernel and modules:
image=/boot/rtzImage
label=rtlinux
read-only
root=/dev/hda1
WARNING: replace root=/dev/hda1 in the above with your root filesystem. The easiest way to find out which filesystem it should be, take a look at the existing entry in your /etc/lilo.conf for "root=". Alternatively, type "df", and look for the line for "/" in the "mounted on" column. The corresponding entry in the "Filesystem" column is your root filesystem.
Restart the computer:
Load the RTLinux kernel: At the LILO: prompt, press "Shift" or "Tab". This will give you a listing of the available kernels. Enter:
The RTLinux kernel should boot.
The next step is to compile RTLinux proper.
To be able to run any programs, you must first load the rtlinux modules. To do so, type:
You can also try running the examples. To do so, simply go to the appropriate directory under /usr/src/rtlinux/rtlinux-3.1/examples and follow the instructions in the corresponding README file.
The docs/html/GettingStarted document contains a brief introduction to RTLinux. Additional documents in docs/html also provide information about other aspects to RTLinux such as web installation, CD installation, FAQ, and RTiC-Lab.
In case of problems, please consult the FAQ first, available in the docs/ directory.
If all of the above fails, you can obtain help from your peers via the rtl@rtlinux.org mailing list for which you can un/subscribe to via http://www.rtlinux.org/mailing_lists.html .
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