feat: meson build

Author: superstructor

meson.options

@@ -0,0 +1,3 @@
+option('main_module', type: 'boolean', value: true)
+option('side_module', type: 'boolean', value: true)
+option('simd', type: 'boolean', value: true)

scripts/emscripten.cross

@@ -0,0 +1,17 @@
+[binaries]
+c = 'emcc'
+cpp = 'em++'
+ar = 'emar'
+ranlib = 'emranlib'
+strip = 'llvm-strip'
+pkgconfig = 'em-pkg-config'
+
+[built-in options]
+c_args = []
+c_link_args = []
+
+[host_machine]
+system = 'emscripten'
+cpu_family = 'wasm32'
+cpu = 'wasm32'
+endian = 'little'

scripts/postinstall.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+import os, sys, shutil
+
+def main():
+    prefix = os.environ.get('MESON_INSTALL_DESTDIR_PREFIX') or (sys.argv[1] if len(sys.argv) > 1 else None)
+    if not prefix:
+        prefix = os.getcwd()
+    wasm_dir = os.path.join(prefix, 'wasm')
+    if not os.path.isdir(wasm_dir):
+        return 0
+    target = os.path.join(wasm_dir, 'libjpeg-turbo-side.wasm')
+    if os.path.exists(target):
+        return 0
+    for f in os.listdir(wasm_dir):
+        if f.endswith('.wasm'):
+            shutil.copy2(os.path.join(wasm_dir,f), target)
+            break
+    return 0
+
+if __name__ == '__main__':
+    raise SystemExit(main())
+

wasm/wasm_compat_side.c

@@ -0,0 +1,28 @@
+/*
+ * wasm_compat_side.c - SIDE_MODULE compatibility layer for libjpeg-turbo
+ * Copyright (c) 2025 Superstruct Ltd, New Zealand
+ * Licensed under same license as libjpeg-turbo
+ */
+
+#include <emscripten.h>
+
+/* SIDE_MODULE export declarations for libjpeg-turbo */
+EMSCRIPTEN_KEEPALIVE int wasm_side_module_init(void) {
+    return 1; /* Success */
+}
+
+EMSCRIPTEN_KEEPALIVE const char* wasm_side_module_version(void) {
+    return "3.1.2-wasm-native";
+}
+
+/* Forward declarations for SIDE_MODULE exports */
+extern int jpeg_wasm_init(void);
+extern void jpeg_wasm_cleanup(void);
+
+EMSCRIPTEN_KEEPALIVE int libjpeg_turbo_side_init(void) {
+    return jpeg_wasm_init();
+}
+
+EMSCRIPTEN_KEEPALIVE void libjpeg_turbo_side_cleanup(void) {
+    jpeg_wasm_cleanup();
+}