Update build.zig to support 0.11

[silbinarywolf]

The issue

From what I can tell there was seemingly nothing to set the build path for the obj file in 0.11. After digging around and trying to figure out how to get this working, I discovered this solution that works with 0.11.

Version

0.11.0-dev.3394+c842deea7

Code

const std = @import("std");
const Builder = std.build.Builder;

pub fn build(b: *Builder) void {
    const obj = b.addObject(.{
        .name = "wiimain",
        .root_source_file = .{
            .path = "src/main.zig",
        },
        .optimize = b.standardOptimizeOption(.{}),
        .target = .{
            .cpu_arch = .powerpc,
            .os_tag = .freestanding,
            .abi = .eabi,
            .cpu_model = .{ .explicit = &std.Target.powerpc.cpu.@"750" },
            .cpu_features_add = std.Target.powerpc.featureSet(&.{.hard_float}),
        },
        .link_libc = true,
    });
    obj.setLibCFile(std.build.FileSource{ .path = "libc.txt" });
    obj.addIncludePath("vendor/devkitpro/libogc/include");

    const devkitFolder = "C:/devkitPro"; // Change this to wherever you've installed devKitPro
    const elf = b.addSystemCommand(&[_][]const u8{devkitFolder ++ "/devkitPPC/bin/powerpc-eabi-gcc"});
    elf.addFileSourceArg(obj.getOutputSource()); // add argument to "wiimain.o" that'll be somewhere in zig-cache
    elf.addArgs(&[_][]const u8{ "-g", "-DGEKKO", "-mrvl", "-mcpu=750", "-meabi", "-mhard-float", "-Wl,-Map,zig-out/.map", "-L" ++ devkitFolder ++ "/libogc/lib/wii", "-lwiiuse", "-lbte", "-logc", "-lm", "-o", "zig-out/zig-wii.elf" });
    const dol = b.addSystemCommand(&[_][]const u8{ devkitFolder ++ "/tools/bin/elf2dol", "zig-out/zig-wii.elf", "zig-out/zig-wii.dol" });
    b.default_step.dependOn(&dol.step);
    dol.step.dependOn(&elf.step);
    elf.step.dependOn(&obj.step);
}