how can i get the element ”canvas“ when I set the link flag PROXY_TO_PTHREAD=1

[WenAce]

I need to use emscripten_webgl_create_context to create content，when i set the PROXY_TO_PTHREAD=1，emscripten_webgl_create_context can‘t create content，the value is 0，because it can’t get the element ‘canvas’

[jspanchu]

I think you're not using the correct compile/link flags.

Refer to test/gl_in_proxy_pthread.cpp and it's compiler flags in

emscripten/test/test_browser.py

Line 4624 in 0be5b60

def test_webgl_offscreen_canvas_in_proxied_pthread(self, asyncify):