xcb: add sample

packages/xcb/build.zig

@@ -2,10 +2,13 @@ const std = @import("std");
 
 pub fn build(b: *std.Build) void {
     const target = b.standardTargetOptions(.{});
+    const optimize = b.standardOptimizeOption(.{});
 
     const mod = b.addModule("xcb", .{
         .root_source_file = b.path("src/root.zig"),
         .target = target,
+        .optimize = optimize,
+        .link_libc = true,
     });
 
     mod.linkSystemLibrary("xcb", .{});
@@ -18,4 +21,30 @@ pub fn build(b: *std.Build) void {
 
     const test_step = b.step("test", "Run tests");
     test_step.dependOn(&run_mod_tests.step);
+
+    const sample_module = b.createModule(.{
+        .root_source_file = b.path("sample/root.zig"),
+        .target = target,
+        .optimize = optimize,
+        .imports = &.{
+            .{ .name = "xcb", .module = mod },
+        },
+    });
+
+    const sample_exe = b.addExecutable(.{
+        .name = "sample",
+        .root_module = sample_module,
+    });
+
+    const sample_install = b.addInstallArtifact(sample_exe, .{});
+
+    const run_sample = b.addRunArtifact(sample_exe);
+    run_sample.step.dependOn(&sample_install.step);
+
+    if (b.args) |args| {
+        run_sample.addArgs(args);
+    }
+
+    const sample_step = b.step("sample", "Run sample");
+    sample_step.dependOn(&run_sample.step);
 }