Setting `--closure 1` causes `JSC_UNDEFINED_VARIABLE` errors about emscripten

[sbc100]

The requirement to explicitly add -lEGL -lGL -lhtml5 is because you are using -sSTRICT, and this sets -sAUTO_JS_LIBRARIES=0 which means you have to explicitly add those libraries, they don't get included automatically.

See https://emscripten.org/docs/tools_reference/settings_reference.html?highlight=environment#strict

[sbc100]

Hmm.. it looks like SDL is using some JS library symbols that are not present by default.

We should fix that upstream in SDL.

In the mean time you can do -sDEFAULT_LIBRARY_FUNCS_TO_INCLUDE=allocate,ALLOC_NORMAL,intArrayFromString to include those symbols in your build.

[oboukli]

Tried that and got new errors. BTW, changing FILESYSTEM also changes the error.

Note that in the minimal example above, it seems that, at least since v3.1.56, it's required to add -lEGL -lGL -lhtml5 although I'm not sure the docs mention -lhtml5 explicitly.

I've been unable to build with a similar setup since after v3.1.47 . Perhaps tests with strict and fine-tuned settings could be missing.