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Line 1: ~~== Introduction ==~~ If you want to write an operating system in C, you'll [[Why_do_I_need_a_Cross_Compiler\|need a cross-compiler]]. However, [[GCC_Cross-Compiler\|building a GCC cross-compiler]] can be painful. If you just want to write C (not C++), you can use [https://andrewkelley.me/post/zig-cc-powerful-drop-in-replacement-gcc-clang.html <kbd>zig cc</kbd>] - a C cross-compiler that comes with the [https://ziglang.org/ Zig programming language]. There are [https://ziglang.org/download/ pre-compiled binaries] for Windows, Linux, MacOS, and FreeBSD. === Bare-Bones with <kbd>zig cc</kbd> === This section describes how to build [[Bare Bones]] using <kbd>zig cc</kbd>. First off, install the following software: * [https://ziglang.org/download/ Zig] (tested with version 0.6.0) * aGNU ~~modern~~binutils ~~gcc~~(we ~~toolchain~~just care about the [[LD\|linker]] - (if <kbd>ld --version</kbd> reports "GNU ld", you ~~should be~~'re good to go) * [[NASM]] IfStart ~~you~~off ~~want~~with tothe ~~complete~~standard [[Bare Bones]] ~~with <kbd>zig cc</kbd>~~setup, ~~you should~~but use the <kbd>boot.asm</kbd> file provided in [[Bare Bones with NASM]] instructions (since Zig does not come with an assembler, just a C compiler). At that point, you can continue with [[Bare Bones]], but instead of using <kbd>i686-elf-gcc</kbd>, use the following command to build <kbd>kernel.c</kbd>: <~~source~~syntaxhighlight lang="bash">zig build-obj --c-source kernel.c -target i386-freestanding</~~source~~syntaxhighlight> This should create a <kbd>kernel.o</kbd> file, just the same as if you had used gcc. When you get to the linking step, we won't be able to use <kbd>i686-elf-gcc</kbd>, but luckily, modern versions of [[LD\|GNU <kbd>ld</kbd>]] are able to emulate almost any other linker, so we can use the system <kbd>ld</kbd> like so: <~~source~~syntaxhighlight lang="bash">ld -m elf_i386 -T linker.ld -o myos.bin boot.o kernel.o</~~source~~syntaxhighlight> And at that point, you can carry on with [[Bare Bones]], and you should have an operating system, compiled without having to compile your own cross-compiler! [[Category:Compilers]] [[Category:Zig]]