{"id":121335,"date":"2025-01-14T09:46:13","date_gmt":"2025-01-14T07:46:13","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dostupen-emscripten-4-0-kompilyator-iz-c-c-v-webassembly"},"modified":"2025-01-14T09:46:13","modified_gmt":"2025-01-14T07:46:13","slug":"dostupen-emscripten-4-0-kompilyator-iz-c-c-v-webassembly","status":"publish","type":"post","link":"https:\/\/prohoster.info\/es\/blog\/news\/dostupen-emscripten-4-0-kompilyator-iz-c-c-v-webassembly","title":{"rendered":"Est\u00e1 disponible Emscripten 4.0, un compilador de C\/C++ a WebAssembly","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Se ha publicado la versi\u00f3n 4.0 de la herramienta Emscripten, que permite compilar c\u00f3digo en C\/C++ y otros lenguajes que tienen frontends basados en LLVM a un c\u00f3digo intermedio universal de bajo nivel llamado WebAssembly. El resultado obtenido se puede utilizar para la integraci\u00f3n con proyectos de JavaScript, su ejecuci\u00f3n en navegadores web, su uso en Node.js o para crear aplicaciones multiplataforma independientes que se ejecutan mediante un entorno de ejecuci\u00f3n wasm. El c\u00f3digo del proyecto se distribuye bajo la licencia MIT. En el compilador se utilizan desarrollos del proyecto LLVM, y para generar WebAssembly y optimizar, se emplea la biblioteca Binaryen.    <\/p>\n<p>El objetivo principal de Emscripten es crear una herramienta que permita ejecutar c\u00f3digo en la web independientemente del lenguaje de programaci\u00f3n en el que se haya escrito originalmente ese c\u00f3digo. En las aplicaciones compiladas se pueden utilizar llamadas a bibliotecas est\u00e1ndar de C y C++ (libc, libcxx), extensiones de C++, multihilo basado en pthreads, API POSIX y muchas bibliotecas multimedia. Se proporcionan API separadas para la integraci\u00f3n con API web y c\u00f3digo en JavaScript.    <\/p>\n<p>Emscripten soporta la traducci\u00f3n de la salida de la biblioteca SDL2 a trav\u00e9s de Canvas, as\u00ed como la implementaci\u00f3n de soporte para OpenGL y EGL mediante la API WebGL, lo que permite convertir aplicaciones gr\u00e1ficas y juegos a WebAssembly (por ejemplo, hay un puerto del toolkit Qt, se soportan los motores de juegos Unreal Engine y Unity, as\u00ed como el motor de simulaci\u00f3n de procesos f\u00edsicos Bullet).     <\/p>\n<p>Adem\u00e1s de compilar c\u00f3digo en C\/C++, se desarrollan proyectos por separado para ejecutar int\u00e9rpretes en navegadores y <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/es\/vps\/\"   title=\"m\u00e1quinas virtuales\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2133\">m\u00e1quinas virtuales<\/a> para lenguajes como Lua, C#, Python, Ruby y Perl. Adem\u00e1s, es posible aplicar frontends a LLVM diferentes de Clang, como frontends para lenguajes como Swift, Rust, D y Fortran.      <\/p>\n<p>La asignaci\u00f3n del n\u00famero de versi\u00f3n 4.0 est\u00e1 relacionada con la introducci\u00f3n de cambios que rompen la compatibilidad a nivel de ABI (al recompilar un proyecto en Emscripten 4.0 ser\u00e1 necesario recompilar los archivos objeto y bibliotecas construidos con versiones anteriores de Emscripten). Los cambios principales en Emscripten 4.0 son:  <\/p>\n<ul>\n<li class=\"l\"> Se ha a\u00f1adido la opci\u00f3n &#171;-sWASM_LEAGCY_EXCEPTIONS&#187; para elegir entre los antiguos y nuevos mecanismos de manejo de excepciones. Por defecto, se sigue utilizando el antiguo mecanismo, ya que no todos los navegadores han implementado las capacidades de WebAssembly para trabajar con los nuevos manejadores de excepciones.\n<li class=\"l\"> Los componentes compiler-rt, libcxx, libcxxabi y libunwind se han actualizado a la rama LLVM 19.\n<li class=\"l\"> La versi\u00f3n m\u00ednima soportada en las compilaciones del navegador Safari (configuraci\u00f3n MIN_SAFARI_VERSION) se ha aumentado de 14.1 a 15.0, lo que permite habilitar varias funcionalidades avanzadas de WebAssembly por defecto:\n<ul>\n<li class=\"l\"> Se ha incluido el uso de nuevas instrucciones para la conversi\u00f3n de tipo de float a int (nontrapping-fptoint), que en lugar de generar una excepci\u00f3n al desbordar el resultado, devuelven el valor m\u00ednimo o m\u00e1ximo posible (necesario para SIMD).\n<li class=\"l\"> Se ha habilitado la opci\u00f3n WASM_BIGINT, en la cual se utiliza el tipo BigInt para el intercambio de valores enteros de 64 bits entre WebAssembly y c\u00f3digo de JavaScript.\n<li class=\"l\"> Se ha habilitado la opci\u00f3n BULK_MEMORY, donde para la implementaci\u00f3n de las funciones C memcpy y memset se utilizan las instrucciones de WebAssembly memory.copy y memory.fill.    <\/ul>\n<li class=\"l\"> En la funci\u00f3n PATH.basename() se ha deshabilitado la normalizaci\u00f3n de rutas (PATH.normalize()), es decir, la llamada &#8216;PATH.basename(&#171;a\\\/.A0&#187;)&#8217; ahora devolver\u00e1 &#171;.&#187; en lugar de &#171;a&#187;, y &#8216;PATH.basename(&#171;a\\\/b\\\/..&#187;)&#8217; devolver\u00e1 &#171;..&#187; en lugar de &#171;a&#187;.\n<li class=\"l\"> Al utilizar la opci\u00f3n &#171;-sMODULARIZE&#187;, las funciones de f\u00e1brica que crean y devuelven instancias de m\u00f3dulos y objetos WebAssembly para JavaScript, ahora est\u00e1n marcadas con el indicador &#171;async&#187; al compilar en modo WASM_ASYNC_COMPILATION, que se aplica por defecto.\n<li class=\"l\"> Se ha a\u00f1adido la posibilidad de especificar bibliotecas de JavaScript utilizando la opci\u00f3n &#171;-lfoo.js&#187;. A diferencia de la opci\u00f3n &#171;&#8212;js-library&#187;, la b\u00fasqueda de la biblioteca se realiza en todas las rutas especificadas a trav\u00e9s de la opci\u00f3n &#171;-L&#187;.\n<li class=\"l\"> Al compilar en modo de depuraci\u00f3n (-O0 o -sASSERTIONS) se ha habilitado por defecto la versi\u00f3n de depuraci\u00f3n de la funci\u00f3n malloc con verificaciones de aserci\u00f3n, que identifican errores como la llamada doble a la funci\u00f3n free().        <\/ul>\n<p>Fuente: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=62553\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u044f Emscripten 4.0, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u043a\u043e\u043c\u043f\u0438\u043b\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043a\u043e\u0434 \u043d\u0430 C\/C++ \u0438 \u0434\u0440\u0443\u0433\u0438\u0445 \u044f\u0437\u044b\u043a\u0430\u0445, \u0434\u043b\u044f \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0438\u043c\u0435\u044e\u0442\u0441\u044f \u0444\u0440\u043e\u043d\u0442\u044d\u043d\u0434\u044b \u043d\u0430 \u0431\u0430\u0437\u0435 LLVM, \u0432 \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0430\u043b\u044c\u043d\u044b\u0439 \u043d\u0438\u0437\u043a\u043e\u0443\u0440\u043e\u0432\u043d\u0435\u0432\u044b\u0439 \u043f\u0440\u043e\u043c\u0435\u0436\u0443\u0442\u043e\u0447\u043d\u044b\u0439 \u043a\u043e\u0434 WebAssembly. \u041f\u043e\u043b\u0443\u0447\u0435\u043d\u043d\u044b\u0439 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0434\u043b\u044f \u0438\u043d\u0442\u0435\u0433\u0440\u0430\u0446\u0438\u0438 \u0441 JavaScript-\u043f\u0440\u043e\u0435\u043a\u0442\u0430\u043c\u0438, \u0437\u0430\u043f\u0443\u0441\u043a\u0430 \u0432 web-\u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0435, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0432 Node.js \u0438\u043b\u0438 \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u043e\u0431\u043e\u0441\u043e\u0431\u043b\u0435\u043d\u043d\u044b\u0445 \u043c\u043d\u043e\u0433\u043e\u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0435\u043d\u043d\u044b\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439, \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u0435\u043c\u044b\u0445 \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 wasm runtime. \u041a\u043e\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-121335","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u044f Emscripten 4.0, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u043a\u043e\u043c\u043f\u0438\u043b\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043a\u043e\u0434 \u043d\u0430 C\/C++ \u0438 \u0434\u0440\u0443\u0433\u0438\u0445 \u044f\u0437\u044b\u043a\u0430\u0445, \u0434\u043b\u044f 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