wasm: skip imgui example

.github/workflows/build.yml

@@ -33,6 +33,7 @@ jobs:
             dub build :debugtext_print
             # dub build :cube
             # dub build :blend
+            dub build :imgui
             dub build :triangle
             # dub build :mrt
             dub build :user_data

build.zig

@@ -176,15 +176,18 @@ pub fn buildLibSokol(b: *Build, options: LibSokolOptions) !*CompileStep {
             .flags = cflags,
         });
     }
-    lib.addCSourceFile(.{
-        .file = .{ .path = csrc_root ++ "sokol_imgui.c" },
-        .flags = cflags,
-    });
-    const cimgui = try buildImgui(b, .{ .target = options.target, .optimize = options.optimize, .emsdk = options.emsdk });
-    for (cimgui.root_module.include_dirs.items) |dir| {
-        try lib.root_module.include_dirs.append(b.allocator, dir);
+    // FIXME: missing 'assert.h'
+    if (!lib.rootModuleTarget().isWasm()) {
+        lib.addCSourceFile(.{
+            .file = .{ .path = csrc_root ++ "sokol_imgui.c" },
+            .flags = cflags,
+        });
+        const cimgui = try buildImgui(b, .{ .target = options.target, .optimize = options.optimize, .emsdk = options.emsdk });
+        for (cimgui.root_module.include_dirs.items) |dir| {
+            try lib.root_module.include_dirs.append(b.allocator, dir);
+        }
+        lib.linkLibrary(cimgui);
     }
-    lib.linkLibrary(cimgui);
     if (sharedlib)
         b.installArtifact(lib);
     return lib;
@@ -233,6 +236,10 @@ pub fn build(b: *Build) !void {
     };
 
     inline for (examples) |example| {
+        comptime {
+            if (builtin.cpu.arch.isWasm() and std.mem.eql(u8, example, "imgui"))
+                continue; // FIXME: cimgui need 'assert.h'.
+        }
         const ldc = try ldcBuildStep(b, .{
             .name = example,
             .artifact = lib_sokol,