Re: EMC and rtai

[Paul <paul.corner-at-tesco.net>]

Hi Ian

First steps are to download the latest EMC sources from sourceforge, get a 
virgin 2.4.16 kernel and rtai-24.1.7. I then took the following steps to 
compile on a RH7.2 :-
Created a /usr/src/linux-2.4.16 directory for the kernel sources.
Made two symlinks, /usr/src/linux and /usr/src/linux-2.4 both pointing to the 
kernel directory.
Deleted the /usr/include/asm and /usr/include/linux directories and created 
symlinks of the same names pointing to the coresponding entries in src/linux.
Installed the egcs-6.2-compat & egcs++-6.2-compat packages along with their 
dependencies.
Removed the existing gcc and gcc++ binaries in /usr/bin and renamed the egcs 
& egcs++.
Followed the instructions for applying the rtai patch.
Did the usual "make menuconfig", "make dep clean etc" followed by running 
lilo after editing the lilo.conf.
Rebooted and did the "make menuconfig" in the rtai directory. Cursed when I 
found the make failed with some of the lxrt stuff - Went back one step and 
removed the offending items in the menuconfig.
moving on to the tests, the b**** thing refused to load any of the rtai 
modules. Swore profusely and re-read the documents. Going back to the kernel 
config stage, I disabled the Module Version option and went through the 
compile stages again.
This time the test did work..... Yippee !!

Now for the fun stuff - Changing to the rcslib directory, skipping the 
iterations and curses :-
./buildrcs linux_rtai
./buildrcs rtai
cd ../
./compile

The compile script is a modified generic/install script with the PLAT and 
RTPLAT variables explicitly declared.
After a number of emails to Will (thank you for your patience Will), and a 
few minor changes to the EMC sources, i finally got it to run.
These changes have been committed to sourceforge, so you do not have to worry 
about them.

Have fun - And make shure you disable the power management in XFree86. The 
system will crash frrom time to time when the screensaver kicks in.


Regards, Paul.



On Wednesday 09 January 2002 11:25 pm, Ian Wright wrote:

> Did you have to make many changes to the makefiles or move things around
> etc. Perhaps you would like to share your expertise with the rest of us who
> are stumbling around in the dark?