[build] Zig compiler uses wrong paths for files

[hardliner66]

Please, before submitting a new issue verify and check:

• I tested it on latest raylib version from master branch
• I checked there is no similar issue already reported
• I checked the documentation on the wiki
• My code has no errors or misuse of raylib

Issue description

Today I worked the whole day on a game in zig + raylib, when suddenly the compiler complains about not finding one of the raylib headers. This was kinda confusing, because it already worked earlier. I tried restarting my environment and deleting and cloning my repository to make sure everything is clean, but it still has the same error.

I'm not 100% sure if the problem is related to raylib directly or if it's a bug in the zig compiler, but I thought I'd start here and find out.

The problem seems to be, that it want's the file /home/<user>/projects/zig/bug/thirdparty/raylib/src/rcore.c, but somehow adds the project path to the beginning again and now tries to search for /home/<user>/projects/zig/bug/home/<user>/projects/zig/bug/thirdparty/raylib/src/rcore.c which obviously doesn't exist.

Environment

WSL2 on Windows 11

Issue Log

install
└─ install zig_game
   └─ zig build-exe zig_game Debug native
      └─ zig build-lib raylib Debug native 1 errors
error: unable to check cache: stat file '/home/<user>/projects/zig/bug/home/<user>/projects/zig/bug/thirdparty/raylib/src/rcore.c' failed: FileNotFound
error: the following command failed with 1 compilation errors:
/snap/zig/10680/zig build-lib -cflags -std=gnu99 -D_GNU_SOURCE -DGL_SILENCE_DEPRECATION=199309L -fno-sanitize=undefined -- /home/<user>/projects/zig/bug/home/<user>/projects/zig/bug/thirdparty/raylib/src/rcore.c /home/<user>/projects/zig/bug/home/<user>/projects/zig/bug/thirdparty/raylib/src/utils.c -cflags -std=gnu99 -D_GNU_SOURCE -DGL_SILENCE_DEPRECATION=199309L -fno-sanitize=undefined -- /home/<user>/projects/zig/bug/home/<user>/projects/zig/bug/thirdparty/raylib/src/raudio.c -cflags -std=gnu99 -D_GNU_SOURCE -DGL_SILENCE_DEPRECATION=199309L -fno-sanitize=undefined -- /home/<user>/projects/zig/bug/home/<user>/projects/zig/bug/thirdparty/raylib/src/rmodels.c -cflags -std=gnu99 -D_GNU_SOURCE -DGL_SILENCE_DEPRECATION=199309L -fno-sanitize=undefined -- /home/<user>/projects/zig/bug/home/<user>/projects/zig/bug/thirdparty/raylib/src/rshapes.c -cflags -std=gnu99 -D_GNU_SOURCE -DGL_SILENCE_DEPRECATION=199309L -fno-sanitize=undefined -- /home/<user>/projects/zig/bug/home/<user>/projects/zig/bug/thirdparty/raylib/src/rtext.c -cflags -std=gnu99 -D_GNU_SOURCE -DGL_SILENCE_DEPRECATION=199309L -fno-sanitize=undefined -- /home/<user>/projects/zig/bug/home/<user>/projects/zig/bug/thirdparty/raylib/src/rtextures.c -cflags -std=gnu99 -D_GNU_SOURCE -DGL_SILENCE_DEPRECATION=199309L -fno-sanitize=undefined -- /home/<user>/projects/zig/bug/home/<user>/projects/zig/bug/thirdparty/raylib/src/rglfw.c -lGL -lX11 -ODebug -I /home/<user>/projects/zig/bug/thirdparty/raylib/src/external/glfw/include -I /usr/include -DPLATFORM_DESKTOP=1 -L /usr/lib -Mroot -lc --cache-dir /home/<user>/projects/zig/bug/zig-cache --global-cache-dir /home/<user>/.cache/zig --name raylib -static --listen=-
Build Summary: 1/5 steps succeeded; 1 failed (disable with --summary none)
install transitive failure
└─ install zig_game transitive failure
   └─ zig build-exe zig_game Debug native transitive failure
      └─ zig build-lib raylib Debug native 1 errors
error: the following build command failed with exit code 1:
/home/<user>/projects/zig/bug/zig-cache/o/4fb50086aa92a2d65550f7adf4bffd10/build /snap/zig/10680/zig /home/<user>/projects/zig/bug /home/<user>/projects/zig/bug/zig-cache /home/<user>/.cache/zig --seed 0xdb252460 -Z4f53ef88298f910d

Code Example

I uploaded my reduced code here: https://github.com/hardliner66/bug

The main.zig is just the following:

const std = @import("std");
const rl = @cImport(@cInclude("raylib.h"));

const screen_width = 800;
const screen_height = 450;

pub fn main() anyerror!void {
    rl.InitWindow(screen_width, screen_height, "ZigGame");
    defer rl.CloseWindow();

    rl.SetTargetFPS(60);
    //--------------------------------------------------------------------------------------

    // Main game loop
    while (!rl.WindowShouldClose()) {
        rl.BeginDrawing();
        defer rl.EndDrawing();

        rl.ClearBackground(rl.WHITE);
        rl.DrawText("Congrats! You created your first window!", 190, 200, 20, rl.LIGHTGRAY);
    }
}

and the build.zig is this:

const std = @import("std");
const raySdk = @import("thirdparty/raylib/src/build.zig");

// Although this function looks imperative, note that its job is to
// declaratively construct a build graph that will be executed by an external
// runner.
pub fn build(b: *std.Build) !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 optimization options allow the person running `zig build` to select
    // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall. Here we do not
    // set a preferred release mode, allowing the user to decide how to optimize.
    const optimize = b.standardOptimizeOption(.{});

    const exe = b.addExecutable(.{
        .name = "zig_game",
        // In this case the main source file is merely a path, however, in more
        // complicated build scripts, this could be a generated file.
        .root_source_file = .{ .path = "src/main.zig" },
        .target = target,
        .optimize = optimize,
    });
    exe.subsystem = std.builtin.subsystem;

    // This declares intent for the executable to be installed into the
    // standard location when the user invokes the "install" step (the default
    // step when running `zig build`).
    b.installArtifact(exe);

    const raylib = try raySdk.addRaylib(b, target, optimize, .{});
    exe.addIncludePath(.{ .path = "thirdparty/raylib/src" });
    exe.linkLibrary(raylib);

    // This *creates* a Run step in the build graph, to be executed when another
    // step is evaluated that depends on it. The next line below will establish
    // such a dependency.
    const run_cmd = b.addRunArtifact(exe);

    // By making the run step depend on the install step, it will be run from the
    // installation directory rather than directly from within the cache directory.
    // This is not necessary, however, if the application depends on other installed
    // files, this ensures they will be present and in the expected location.
    run_cmd.step.dependOn(b.getInstallStep());

    // This allows the user to pass arguments to the application in the build
    // command itself, like this: `zig build run -- arg1 arg2 etc`
    if (b.args) |args| {
        run_cmd.addArgs(args);
    }

    // This creates a build step. It will be visible in the `zig build --help` menu,
    // and can be selected like this: `zig build run`
    // This will evaluate the `run` step rather than the default, which is "install".
    const run_step = b.step("run", "Run the app");
    run_step.dependOn(&run_cmd.step);

    // Creates a step for unit testing. This only builds the test executable
    // but does not run it.
    const unit_tests = b.addTest(.{
        .root_source_file = .{ .path = "src/main.zig" },
        .target = target,
        .optimize = optimize,
    });

    const run_unit_tests = b.addRunArtifact(unit_tests);

    // Similar to creating the run step earlier, this exposes a `test` step to
    // the `zig build --help` menu, providing a way for the user to request
    // running the unit tests.
    const test_step = b.step("test", "Run unit tests");
    test_step.dependOn(&run_unit_tests.step);
}

[hardliner66]

Fixed with #3835