Emscripten Linking Error on Windows

[RottenBlock]

When trying to build system3-sdl2 with Emscripten on an English Windows 10, I suffer an error during the step "Linking CXX executable system3.js." I'm using unmodified code from the repo, and I've tried reinstalling emscripten, system3-sdl2, and even python a few times, without any luck. Using emscripten on Linux works fine, the problem seems exclusive to Windows. Here's the traceback:

Traceback (most recent call last):
File "C:\emsdk\upstream\emscripten\em++.py", line 14, in
sys.exit(emcc.run(sys.argv))
File "C:\emsdk\upstream\emscripten\emcc.py", line 2150, in run
post_link(options, wasm_target, wasm_target, target)
File "C:\emsdk\upstream\emscripten\emcc.py", line 2179, in post_link
emscripten.run(in_wasm, wasm_target, final_js, memfile)
File "C:\emsdk\upstream\emscripten\emscripten.py", line 845, in run
emscript(in_wasm, out_wasm, outfile_js, memfile, shared.DEBUG)
File "C:\emsdk\upstream\emscripten\emscripten.py", line 283, in emscript
metadata = finalize_wasm(in_wasm, out_wasm, memfile, DEBUG)
File "C:\emsdk\upstream\emscripten\emscripten.py", line 437, in finalize_wasm
stdout=subprocess.PIPE)
File "C:\emsdk\upstream\emscripten\tools\building.py", line 1618, in run_binaryen_command
ret = check_call(cmd, stdout=stdout).stdout
File "C:\emsdk\upstream\emscripten\tools\shared.py", line 105, in check_call
return run_process(cmd, *args, **kw)
File "C:\emsdk\upstream\emscripten\tools\shared.py", line 95, in run_process
ret = subprocess.run(cmd, check=check, input=input, *args, **kw)
File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\subprocess.py", line 474, in run
File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\subprocess.py", line 926, in communicate
File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\cp1252.py", line 23, in decode
UnicodeDecodeError: 'charmap' codec can't decode byte 0x81 in position 95: character maps to
make[2]: *** [CMakeFiles\system3.dir\build.make:538: system3.js] Error 1
make[1]: *** [CMakeFiles\Makefile2:114: CMakeFiles/system3.dir/all] Error 2
make: *** [Makefile:102: all] Error 2

Any ideas?

[kichikuou]

Looks similar to emscripten-core/emscripten#10551.
Maybe try the workaround (setting environment variable) described there?

[RottenBlock]

Good, looks like setting PYTHONUTF8 to 1 does it for me!