You do not mention which os you are targeting I'll assume its buster from 
snibbles of what you present:

I'm not sure the Machinekit repo is fully prepaired/updated for Debian 
Buster (as the split -cnc/-hal repos are)
So to build natively for buster I'll recommend cloning the machinekit-hal 
repo <https://github.com/machinekit/machinekit-hal> and following the 
instructions:

If you want to build as a RIP, you need to clone *machinekit-hal*.
>
> From the root of that clone run scripts/build_with_cnc
>
> This will clone *machinekit-cnc* into the root of the *machinekit-hal*
>  clone.
>
> *machinekit-hal* is built, then *machinekit-cnc* is built with necessary 
> artifacts from *machinekit-hal* build copied over.
>
> Then the required libs/binaries/scripts/configs etc are copied into 
> *machinekit-hal* and the environment var is set ready to run the RIP
>

from the machinekit-cnc repo <https://github.com/machinekit/machinekit-cnc>

Personally I prefer having docker installed and cross-building the packages 
via the docker-builder <https://github.com/zultron/mk-cross-builder> locally 
(see Building locally  section)

Best wishes
Michael


On Sunday, 27 October 2019 20:08:05 UTC+1, Joseph wrote:
>
> Standard 32-bit armhf image.  Built 4.19.y-rt kernel7l image and installed.
>
> Joe
>
> On Sunday, October 27, 2019 at 11:02:35 AM UTC-7, Michael Brown wrote:
>>
>> Are you running a 32-bit(armhf) or 64-bit(arm64) build ?
>>
>> Michael
>>
>> On Sunday, 27 October 2019 00:35:15 UTC+2, Joseph wrote:
>>>
>>> First issue: Tried installing the MK package on RPi4 but get dependency 
>>> error as follows
>>>
>>> pi@rpi4-2gb:~ $ sudo apt-get install machinekit-rt-preempt
>>> Reading package lists... Done
>>> Building dependency tree       
>>> Reading state information... Done
>>> Some packages could not be installed. This may mean that you have
>>> requested an impossible situation or if you are using the unstable
>>> distribution that some required packages have not yet been created
>>> or been moved out of Incoming.
>>> The following information may help to resolve the situation:
>>>
>>> The following packages have unmet dependencies:
>>>  machinekit-rt-preempt : Depends: machinekit (= 
>>> 0.1.1570528621.git9239acb-1~buster) but it is not going to be installed
>>>                          Depends: yapps2-runtime but it is not 
>>> installable
>>> E: Unable to correct problems, you have held broken packages.
>>>
>>>
>>>
>>> Second issue: building MK on RPi4 native and get link error
>>> /usr/bin/ld: objects/hal/utils/halcmd_commands.o: undefined reference to 
>>> symbol '__atomic_load_8@@LIBATOMIC_1.0'
>>> /usr/bin/ld: //usr/lib/arm-linux-gnueabihf/libatomic.so.1: error adding 
>>> symbols: DSO missing from command line
>>> collect2: error: ld returned 1 exit status
>>> make: *** [hal/utils/Submakefile:32: ../bin/halcmd] Error 1
>>> make: Leaving directory '/home/pi/machinekit/src'
>>>
>>> The library is present and running strings on it shows the symbol is 
>>> available
>>>
>>> pi@rpi4-2gb:/usr/lib/arm-linux-gnueabihf $ ls -l libatom*
>>> lrwxrwxrwx 1 root root    18 Apr 15  2019 libatomic.so.1 -> 
>>> libatomic.so.1.2.0
>>> -rw-r--r-- 1 root root 30104 Apr 15  2019 libatomic.so.1.2.0
>>> pi@rpi4-2gb:/usr/lib/arm-linux-gnueabihf $ strings libatomic.so.1.2.0
>>> fU.+
>>> fU2+
>>> __gmon_start__
>>> _ITM_deregisterTMCloneTable
>>> _ITM_registerTMCloneTable
>>> __cxa_finalize
>>> __atomic_load_8
>>> memcpy
>>> __atomic_load_1
>>> __atomic_load_2
>>> __atomic_load_4
>>> __atomic_load
>>> ...
>>>
>>> Has anyone successfully built MK for the RPi4?  If so would you share 
>>> your method?
>>>
>>> Thank you,   Joe
>>>
>>>

-- 
website: http://www.machinekit.io blog: http://blog.machinekit.io github: 
https://github.com/machinekit
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