another hobby operating system :)
https://www.benjidial.net/weblog/calcite
| disk/limine | ||
| kernel | ||
| .gitignore | ||
| compile_flags.txt | ||
| get-dependencies.sh | ||
| license.txt | ||
| makefile | ||
| qemu.gdb | ||
| readme.txt | ||
____ _ _ _ / ___|__ _| | ___(_) |_ ___ | | / _` | |/ __| | __/ _ \ | |__| (_| | | (__| | || __/ \____\__,_|_|\___|_|\__\___| Calcite is a hobby operating system. I am maintaining a weblog with occasional status updates at <https://www.benjidial.net/weblog/calcite>. Calcite is very much alpha software. Do not expect it to do anything useful. === Building Calcite requires some software to be installed before it can be built: * curl * GCC (Any C compiler supporting both C99 and C23 should work.) * GNU Binutils (Specifically, "ld" is used to link the kernel.) * GNU Make (I don't think I have used any GNU extensions.) * GNU tar (Any POSIX tar should be fine.) * GNU xorriso * NASM On Debian, it is sufficient to run this command: apt install binutils curl gcc make nasm tar xorriso To build Calcite, first run "sh get-dependencies.sh", then run "make". This will build a disk image at "build/disk.iso" that can be booted with either BIOS or UEFI. === Debugging Once Calcite has been built, some more software is required to debug it: * GNU's GDB * QEMU, including the x86_64 system On Debian, it is sufficient to run this command: apt install gdb qemu-system-x86 Then, just run "make debug". Calcite will be booted in QEMU, and GDB will be attached to it. Use "c" or "continue" in GDB to start execution. While debugging, it is useful to disable optimizations and enable debugging information. In the makefile, under CC_EXTRA_FLAGS, you can change "-O3" to "-Og -ggdb". Then, run "make clean" and then "make" again. === License Calcite is Copyright 2025 Benji Dial, and licensed under the GNU GPL v3. See "license.txt" for the text of the license. The disk image includes the Limine bootloader. Limine is Copyright 2019-2025 Mintsuki and contributors, and is released under the BSD 2-Clause license. You can find Limine online at <https://github.com/limine-bootloader/limine>. After running "sh get-dependencies.sh", you can find the license of Limine at "dependencies/limine/LICENSE". Limine also has its own dependencies. In the source repository of Limine, you can find a list of these with their licenses at "3RDPARTY.md".