{"action":"opened","issue":{"url":"https://api.github.com/repos/kripken/emscripten/issues/3676","labels_url":"https://api.github.com/repos/kripken/emscripten/issues/3676/labels{/name}","comments_url":"https://api.github.com/repos/kripken/emscripten/issues/3676/comments","events_url":"https://api.github.com/repos/kripken/emscripten/issues/3676/events","html_url":"https://github.com/kripken/emscripten/issues/3676","id":100610741,"number":3676,"title":"Option to hide intrinsic headers","user":{"login":"Kagami","id":533383,"avatar_url":"https://avatars.githubusercontent.com/u/533383?v=3","gravatar_id":"","url":"https://api.github.com/users/Kagami","html_url":"https://github.com/Kagami","followers_url":"https://api.github.com/users/Kagami/followers","following_url":"https://api.github.com/users/Kagami/following{/other_user}","gists_url":"https://api.github.com/users/Kagami/gists{/gist_id}","starred_url":"https://api.github.com/users/Kagami/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Kagami/subscriptions","organizations_url":"https://api.github.com/users/Kagami/orgs","repos_url":"https://api.github.com/users/Kagami/repos","events_url":"https://api.github.com/users/Kagami/events{/privacy}","received_events_url":"https://api.github.com/users/Kagami/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-08-12T18:53:53Z","updated_at":"2015-08-12T18:53:53Z","closed_at":null,"body":"Some software (e.g. [LAME](https://github.com/rbrito/lame/blob/lame3_99/configure#L15683)) tests presense of xmmintrin.h header in order to enable SSE optimizations which might be undesirable in some cases:\r\n* It invalides asm.js in stable version of browsers\r\n* SSE implementation in Emscripten is not complete yet, e.g. lame fails to build because of [_mm_prefetch lack](https://github.com/kripken/emscripten/issues/3050)\r\n\r\nIt's possible to patch configure script or select different arch but maybe emcc should also has option to completely disable all SIMD-related functionality while SIMD.js is not mature yet? Sorry if request is stupid."}}