Recompiling installed-from-USB (Debian based) LinuxCNC

Hi

Apologies for what is probably a very simple question.

I would like to recompile LCNC, and I have the version installed from USB with Debian Stretch. The final recompiled version needs to be able to run real time, live machines as usual, so not a dev build (as I understand it the dev build is only for software testing?)

I tried following the documentation here linuxcnc.org/docs/2.4/html/install_compiling_emc2.html#r1_5 but it seems the USB installed build does not have a folder called emc2/src. I also tried looking for linuxcnc/src, no dice. Googling for "recompiling Linuxcnc" loops round to building from source, rather than recompiling a current installation.

I need to update the build with a mesa patch, among other things, hence the need to rebuild. I also replaced the 5axisgui file completely, and given the errors from lcnc when launching 5axis vismach, saying the file cannot be found I am assuming a rebuild is needed?

Cheers

Hi Tommy

Thanks for the reply. I can see the post has instructions on downloading the git and building, it has linuxcnc-dev builds and RIP builds as well as creating deb packages, and says "Each post assumes you have a fresh install of Linux Mint 18.1 installed."

This is not what I am doing however. I installed from an iso here www.linuxcnc.org/testing-stretch-rtpreempt/ and just want to rebuild after modifying some files. I am running in debian stretch.

I am relatively new to this side of linuxcnc so I apologise for not being able to extract the information from that post, I just could not see how it related to my situation.

Is there not just a folder somewhere in the build where I can run the configure and make commands, similar to what is suggested in the 15 year old documentation?

Edit: What is the most up to date source of documentation for LCNC? Is it all contained within the forum? If not, how can you tell which documentation is still valid? At present I am using a straight google to find the information, which obviously brings up these outdated instructions.

Ah ok, is it necessary to redownload the entire source and rebuild the live install, inserting your modified files into the source code? Anything to be aware of when uninstalling the previous version, or can you just go right ahead and install over the top?

Cheers

OK thats great. After a bit more reading around, I think I will do the sensible thing and switch to a RIP dev build under Ubuntu whilst modifying the files, then rebuild into the machine PC when needed.

Cheers!