build.zig

const std = @import("std");

pub fn build(b: *std.Build) void {
    const target = b.standardTargetOptions(.{ .default_target = .{
        .cpu_arch = .x86,
        .os_tag = .freestanding,
    } });
    const optimize = b.standardOptimizeOption(.{});

    _ = target;

    // Note: This build.zig is a reference for the project structure.
    // The actual build process for Linux 0.11 requires:
    // 1. Compile each Zig module to a .o file
    // 2. Assemble the .s/.S files
    // 3. Link everything together as a flat binary at 0x00000
    // 4. Combine with bootsect and setup to create a floppy image
    //
    // A full build system would need to replicate the original Makefile
    // structure using Zig's build system, with appropriate linker scripts.

    // Create a library that gathers all kernel Zig sources
    const kernel_lib = b.addStaticLibrary(.{
        .name = "kernel_zig",
        .root_source_file = b.path("init/main.zig"),
        .target = b.resolveTargetQuery(.{
            .cpu_arch = .x86,
            .os_tag = .freestanding,
        }),
        .optimize = optimize,
    });

    // Assembly files that need to be assembled separately
    const asm_files = [_][]const u8{
        "kernel/asm.s",
        "kernel/system_call.s",
        "kernel/chr_drv/kb.S",
        "kernel/chr_drv/rs_io.s",
        "mm/page.s",
    };

    for (asm_files) |asm_file| {
        kernel_lib.addAssemblyFile(b.path(asm_file));
    }

    // The boot assembly files are separate and compiled to flat binaries
    // bootsect.s -> bootsect (512 bytes)
    // setup.s -> setup (4 sectors)
    // head.s is linked as part of the kernel
}