emscripten-core/emscripten

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Emscripten: An LLVM-to-WebAssembly Compiler

Stars: 27.6k
Forks: 3.6k
Open beginner issues: 0
Indexed issues: 2k
Avg merge: 1d 14h
Merged PRs (30d): 125

Dominant language: C++
License: No license data
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted

Beginner friendly Everything

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2,037 open issues indexed

Module.locateFile is not working Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

emscripten-core/emscripten#10434 · 18 comments · 2 reactions · Opened Feb 13, 2020
Using <wordexp.h> leads to "error: undefined symbol" / POSIX support? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

emscripten-core/emscripten#10403 · 17 comments · Opened Feb 9, 2020
emmake cmake not finding emscripten/bind.h on Windows Open

wontfix

Difficulty 4/5 3-5 days Newbie friendliness 25/100

emscripten-core/emscripten#10389 · 8 comments · Opened Feb 7, 2020
Asyncify: support recursive yield Open

good first bug help wanted wontfix

Difficulty 4/5 3-5 days Newbie friendliness 35/100

emscripten-core/emscripten#10375 · 3 comments · 5 reactions · Opened Feb 6, 2020
POSIXism leaks to compiled MINIMAL_RUNTIME code: environ_get in code but unused Open

wontfix

Difficulty 4/5 3-5 days Newbie friendliness 35/100

emscripten-core/emscripten#10345 · 5 comments · Opened Feb 3, 2020
Read-only static data location? Open

wontfix

Difficulty 5/5 Over a week Newbie friendliness 25/100

emscripten-core/emscripten#10315 · 5 comments · Opened Jan 29, 2020
How to use TypeScript declarations for Emscripten Open

embind JavaScript

Difficulty 5/5 Over a week Newbie friendliness 25/100

emscripten-core/emscripten#10271 · 27 comments · 12 reactions · Opened Jan 23, 2020
Update the version `ws` used in websocket testing Open

wontfix

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

emscripten-core/emscripten#10264 · 2 comments · Opened Jan 22, 2020
Better native exception handling in threads Open

wontfix

Difficulty 5/5 Over a week Newbie friendliness 25/100

emscripten-core/emscripten#10182 · 6 comments · Opened Jan 10, 2020
STANDALONE_WASM=1 causes requestAnimationFrame to fail. Open

wontfix

Difficulty 4/5 3-5 days Newbie friendliness 25/100

emscripten-core/emscripten#10150 · 4 comments · Opened Jan 6, 2020
Document link/compile/both options Open

wontfix

Difficulty 4/5 3-5 days Newbie friendliness 35/100

emscripten-core/emscripten#10136 · 8 comments · Opened Jan 1, 2020
EM_ASM code size and performance regression from fastcomp to Wasm backend Open

wontfix

Difficulty 5/5 Over a week Newbie friendliness 25/100

emscripten-core/emscripten#10113 · 5 comments · Opened Dec 27, 2019
Do not generate JS Export Stubs Open

wontfix

emscripten-core/emscripten#10099 · 12 comments · 1 reaction · 1 assignee · Opened Dec 23, 2019
Bug: emscripten_set_wheel_callback is passive Open

good first bug help wanted

Difficulty 3/5 1-2 days Newbie friendliness 45/100

emscripten-core/emscripten#10091 · 6 comments · 1 reaction · Opened Dec 20, 2019
Suggestion: Implement Request for Packaging Queue Open

help wanted

Difficulty 5/5 Over a week Newbie friendliness 20/100

emscripten-core/emscripten#10048 · 7 comments · 1 reaction · Opened Dec 16, 2019
Change WebGL powerPreference default to high-performance? Open

GL wontfix

Difficulty 5/5 Over a week Newbie friendliness 25/100

emscripten-core/emscripten#10000 · 10 comments · Opened Dec 10, 2019
emscripten-llvm/clang 10: Segmentation fault with -ffast-math when compiling GraphViz (lab.c) Open

LLVM wasm backend wontfix

Difficulty 4/5 3-5 days Newbie friendliness 35/100

emscripten-core/emscripten#9955 · 7 comments · Opened Dec 4, 2019
Make use of Asyncify for pthread_join Open

asyncify good first bug help wanted multithreading

Difficulty 5/5 Over a week Newbie friendliness 25/100

emscripten-core/emscripten#9910 · 25 comments · 1 reaction · Opened Nov 27, 2019
We need a better way to handle node.js + pthreads errors Open

wontfix

Difficulty 3/5 1-2 days Newbie friendliness 38/100

emscripten-core/emscripten#9899 · 5 comments · Opened Nov 26, 2019
EM_JS and function pointers Open

wontfix

Difficulty 4/5 3-5 days Newbie friendliness 35/100

emscripten-core/emscripten#9868 · 3 comments · Opened Nov 19, 2019
Codeblocks project for emscripten SDL test folder Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

emscripten-core/emscripten#9857 · 5 comments · Opened Nov 19, 2019
WebIDL binder: Use WeakRefs in cache Open

good first bug help wanted

Difficulty 5/5 Over a week Newbie friendliness 25/100

emscripten-core/emscripten#9854 · 7 comments · 2 reactions · Opened Nov 18, 2019
AL_FORMAT_STEREO_FLOAT32 is not defined Open

Difficulty 1/5 Under an hour Newbie friendliness 45/100

emscripten-core/emscripten#9851 · 3 comments · Opened Nov 17, 2019
Source map and offset converter is not loaded or created when providing a custom instantiateWasm function Open

good first bug help wanted

Difficulty 4/5 3-5 days Newbie friendliness 30/100

emscripten-core/emscripten#9836 · 13 comments · Opened Nov 14, 2019
Use WeakRefs in event handlers? Open

good first bug help wanted

Difficulty 5/5 Over a week Newbie friendliness 25/100

emscripten-core/emscripten#9820 · 3 comments · Opened Nov 11, 2019
is allocateUTF8 safe to use ? Open

good first bug help wanted

Difficulty 4/5 3-5 days Newbie friendliness 25/100

emscripten-core/emscripten#9786 · 9 comments · Opened Nov 5, 2019
Binding error when overload the constructor Open

embind wontfix

emscripten-core/emscripten#9704 · 3 comments · 1 assignee · Opened Oct 25, 2019
How should external tools find emscripten? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

emscripten-core/emscripten#9685 · 19 comments · 2 reactions · Opened Oct 21, 2019
std::random_device fails on windows with NODERAWFS Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

emscripten-core/emscripten#9628 · 11 comments · Opened Oct 11, 2019
Proxying of stdio output to main thread Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

emscripten-core/emscripten#9578 · 3 comments · Opened Oct 4, 2019
A version of emscripten_sleep that uses requestAnimationFrame Open

good first bug help wanted wontfix

Difficulty 4/5 3-5 days Newbie friendliness 35/100

emscripten-core/emscripten#9574 · 10 comments · Opened Oct 4, 2019
wasmz.test_cubescript fails on the upstream backend Open

wontfix

emscripten-core/emscripten#9527 · 8 comments · 1 assignee · Opened Sep 27, 2019
Document how to create a custom file system Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

emscripten-core/emscripten#9372 · 11 comments · 3 reactions · Opened Sep 3, 2019
unique_ptr defined twice Open

embind

emscripten-core/emscripten#9343 · 3 comments · 5 reactions · 1 assignee · Opened Aug 28, 2019
atexit()/EXIT_RUNTIME and pthreads Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

emscripten-core/emscripten#9251 · 4 comments · Opened Aug 16, 2019
Proposal to split linking part of emcc.py into emlink.py Open

emscripten-core/emscripten#9218 · 13 comments · 1 assignee · Opened Aug 13, 2019
scanf prompt loops forever Open

help wanted

Difficulty 4/5 3-5 days Newbie friendliness 25/100

emscripten-core/emscripten#9183 · 14 comments · 2 reactions · Opened Aug 8, 2019
dgettext fails: index out of bounds,___mo_lookup@ Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

emscripten-core/emscripten#9085 · 7 comments · Opened Jul 26, 2019
[Feature request] [Discussion] Document/legalize Embind support for custom marshalling Open

embind help wanted

Difficulty 5/5 Over a week Newbie friendliness 25/100

emscripten-core/emscripten#9022 · 8 comments · 5 reactions · Opened Jul 18, 2019
bind failure with register_vector / "implicit instantiation of undefined template" Open

embind help wanted wontfix

Difficulty 4/5 3-5 days Newbie friendliness 35/100

emscripten-core/emscripten#9005 · 7 comments · 2 reactions · Opened Jul 16, 2019
SRGB framebuffer Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

emscripten-core/emscripten#8932 · 5 comments · 1 reaction · Opened Jul 6, 2019
Nodefs errno values don't match emscripten errno values on Windows Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

emscripten-core/emscripten#8882 · 2 comments · Opened Jun 27, 2019
Assertion failed: (isa<X>(Val) && "cast<Ty>() argument of incompatible type!") Open

wontfix

Difficulty 5/5 Over a week Newbie friendliness 20/100

emscripten-core/emscripten#8731 · 34 comments · Opened Jun 2, 2019
Build c++ script with opencv issue Open

wontfix

Difficulty 4/5 3-5 days Newbie friendliness 25/100

emscripten-core/emscripten#8554 · 12 comments · 3 reactions · Opened May 6, 2019
Cannot override SDL2_net with EMCC_LOCAL_PORTS Open

good first bug help wanted

Difficulty 3/5 1-2 days Newbie friendliness 35/100

emscripten-core/emscripten#8466 · 4 comments · Opened Apr 20, 2019
Testing with jest Open

wontfix

Difficulty 4/5 3-5 days Newbie friendliness 20/100

emscripten-core/emscripten#8400 · 9 comments · Opened Apr 5, 2019
Proposal: one EXPORTS setting to rule them all Open

emscripten-core/emscripten#8380 · 21 comments · 1 reaction · 1 assignee · Opened Apr 1, 2019
Linking missing system libraries for side module Open

emscripten-core/emscripten#8308 · 10 comments · 1 assignee · Opened Mar 19, 2019
EMSCRIPTEN_FETCH_REPLACE needed for loads to memory? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

emscripten-core/emscripten#8183 · 5 comments · Opened Feb 26, 2019
Memory grows each time the page refresh until error appear : Uncaught RangeError: WebAssembly.Memory(): could not allocate memory Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

emscripten-core/emscripten#8126 · 26 comments · 4 reactions · Opened Feb 19, 2019

emscripten-core/emscripten

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