WASM hello-world build (Emscripten)

2026-05-21 12:51:06 +05:30
parent 81297f7ea5
commit 86ac50cb42
3 changed files with 4650 additions and 0 deletions
@@ -0,0 +1,18 @@
 #include <iostream>
 #include <emscripten/emscripten.h>
 extern "C" {
 // Exported function: add two numbers
 EMSCRIPTEN_KEEPALIVE
 int add(int a, int b) {
    return a + b;
 }
 // Exported function: print hello message
 EMSCRIPTEN_KEEPALIVE
 void hello() {
    std::cout << "Hello from C++ WASM!" << std::endl;
 }
 }
@@ -0,0 +1,49 @@
 <!DOCTYPE html>
 <html lang="en">
 <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>WASM Hello World</title>
 </head>
 <body>
    <h1>WASM Hello World</h1>
    <p>Open browser console (F12) to see output.</p>
    <!-- Load generated Emscripten JS -->
    <script src="wasm_hello.js"></script>
    <script>
        // Wait until WASM runtime is ready
        Module.onRuntimeInitialized = () => {
            console.log("WASM Runtime Initialized");
            // Call C++ hello() function
            Module.ccall(
                'hello',   // C++ function name
                null,      // return type
                [],        // argument types
                []         // arguments
            );
            // Call C++ add() function
            const result = Module.ccall(
                'add',                 // function name
                'number',              // return type
                ['number', 'number'], // argument types
                [5, 7]                 // arguments
            );
            console.log("Result =", result);
        };
    </script>
 </body>
 </html>