Compiler Explorer

Source code

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

pub fn build(b: *Builder) void {
    // Standard target options allows the person running `zig build` to choose
    // what target to build for. Here we do not override the defaults, which
    // means any target is allowed, and the default is native. Other options
    // for restricting supported target set are available.
    const target = b.standardTargetOptions(.{});

// Standard release options allow the person running `zig build` to select
    // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall.
    const mode = b.standardReleaseOptions();

// We have the following project structure
    //
    // app.zig
    //   ^
    //   |
    // main.c
    //

// First, we compile the zig layer to an object file
    const zig_layer = b.addObject("zig_layer", "src/engine/app/app.zig");
    zig_layer.linkSystemLibrary("c");
    zig_layer.addIncludeDir("src/engine/app/");
    zig_layer.setTarget(target);
    zig_layer.setBuildMode(mode);
    //zig_layer.install();

// It is the first build step
    b.default_step.dependOn(&zig_layer.step);

// still not quite sure what run does
    //const zig_layer_run = zig_layer.run();

// Then we compile the c layer, with the sokol-defined main(), calling the
    // zig_layer.o
    const c_main = b.addExecutable("untitled_game", null);
    c_main.addCSourceFile("src/engine/app/main.c", &[_][]const u8{"-std=c99"});
    c_main.linkSystemLibrary("c");
    c_main.addIncludeDir("src/engine/app/");
    c_main.addObject(zig_layer);
    c_main.setTarget(target);
    c_main.setBuildMode(mode);
    //c_main.install();

// It is the second build step, relying on the zig_layer to be .o'ified
    // first
    //c_main.step.dependOn(&zig_layer_run.step);

// still not quite sure what run does
    const c_main_run = c_main.run();
    //c_main_run.step.dependOn(b.getInstallStep());

// Defines the "zig run" command?
    const run_app_step = b.step("run", "Run the app");
    run_app_step.dependOn(&c_main_run.step);
}