building an OS (all streams)

Currently Playing: building my own operating system in c++ (week 91, cmake cross build)

(detailed timestamps in comments) #livecoding #operatingsystem #coding welcome: https://offlinemark.com/welcome discord: https://discord.gg/XsgpqpVxNu Welcome! I’m an aspiring systems programmer. Professionally, I used to work in infosec, but now I work on music production software & hardware. I stream OS/kernel development every week for 2 hours. (I’ve done this for over 75 weeks in a row! Sundays 10a-12 ET) From February 2024 to May 2025, I streamed myself doing all the labs for MIT’s old Operating Systems Engineering course (6.828 (2018)). Through doing this, I became very familiar with JOS, which is the x86 OS used for the course. This is the OS which I work with in all of my streams. I had almost no experience with OS development when I started, although I did have much experience with programming and low level concepts. I did the coursework because I wanted to write my own OS, but felt I wasn’t ready. Now, from May 2025 to present, I’m pursuing my own learning agenda with OS development. Eventually I will start writing my own OS when the time is right! If this resonates with you, please subscribe and I'll see you in a stream :) 00:00:00 start 00:01:52 Explaining the new dual build system with separate host and target directories 00:10:37 Beginning Git history cleanup using lazy git 00:29:39 Discovering and investigating linker errors when moving code to CPP files 00:43:20 Fixing CMake cross-compilation flags for kernel lib 01:01:04 Detailed Git rebasing and commit reorganization work 01:26:17 Resolving complex merge conflicts during the rebase process 01:42:10 Reviewing and organizing the cleaned up Git commit history 01:54:04 Simplifying tool chain configuration and removing unused code 02:11:32 Final testing and demonstration of the completed build system