DepthOS

stable, protected and very simple in usable OS, which don't restrict you

compile

make build

dependencies

runtime - grub

build on linux/mac - gnu binutils, gcc/g++, nasm, make

build on windows - CROSS* gnu binutils, CROSS* gcc/g++, nasm, make

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* if you don't know what this, read this - https://wiki.osdev.org/GCC_Cross-Compiler