building my first Hal component

I am attempting to build my first Hal component
I have consulted the docs at
linuxcnc.org/docs/html/hal_comp.html#r1_14

I copied the arraydemo code and placed it in a file
named componet-arraydemo

I looked for emc2/src/hal/components but the
/src/hal/components did not exist so I created
the directory structure and placed the file
componet-arraydemo into it.

I opened a terminal and entered the command line
comp --install component-arraydemo.comp
this is was the response it appears nothing happend

me@CNC:~$ comp --compile co,ponent-arraydemo.comp
The program 'comp' can be found in the following packages:
* nmh
* mailutils-mh
Try: sudo apt-get install <selected package>
bash: comp: command not found
me@CNC:~$

I tried several variations on the command line
but faild to get results. An explicit example of how
to make this process work would be very helpful

Thanks

OK figured out that I had to down load and install emc2-dev
Now comp seems to be working but it gives me an error
“Unrecognized file type for mode preprocess “ don’t
know what this exactly means. Could still use a guiding
hand with learning how to do this.

I found a post here by someone that was experiencing the same problem
And fallowed the instructions he received.

Used ubuntu's system > software sources & the synaptic package manager
to locate and install emc2-div this appeared to work.

According to the comp docs there are several ways to use comp and some
limitations. I tried several combos hoping to stumble onto the correct
arrangement.

The error message was produced on my first attempts at comp. Currently
the error message I receive is “IOError: [Errno 2] No such file or directory:
arraydemo.c “

I have tried tweaking the file name extension and moving the file to several
different directories with no success.

I searched for the directory structure emc2-div/src/hal/components and failed
to find any thing like it. Perhaps comp is not installed after all????

Being a Linux newbie tends to compound these difficulties.

YES thats what I was in need of, things look more like they should,
now I think I have a chance of making a component.
But as Yogi Berra said "it ain't over till its over"

Many thanks

Still getting no where with this. Tried comp with an existing comp file got the same errors

me@CNC:~$ comp biquad.comp
Traceback (most recent call last):
File "/usr/bin/comp", line 1297, in <module>
main()
File "/usr/bin/comp", line 1266, in main
process(f, mode, outfile)
File "/usr/bin/comp", line 1140, in process
a, b = parse(filename)
File "/usr/bin/comp", line 386, in parse
f = open(filename).read()
IOError: [Errno 2] No such file or directory: 'biquad.comp'

me@CNC:~$ comp --install biquad.comp
Traceback (most recent call last):
File "/usr/bin/comp", line 1297, in <module>
main()
File "/usr/bin/comp", line 1266, in main
process(f, mode, outfile)
File "/usr/bin/comp", line 1140, in process
a, b = parse(filename)
File "/usr/bin/comp", line 386, in parse
f = open(filename).read()
IOError: [Errno 2] No such file or directory: 'biquad.comp'
me@CNC:~$

What am i doing wrong????

OK I have successfully got comp to convert a comp into a c program
not sure if I have seceded in creating a real time component yet.
I will test this soon.

A question since I am writing C code can I do any thing C or are
there significant restrictions. For example can I open a disk file
and read data into an array in my C code which this ultimately
happens in the hal component when it executes,

Again thanks for the patient assistance.