Running emcc for first time

[cranei]

Using Windows 10 Home Premium installed latest Emscripten. When I run emmcc -V (or anything) I get error:

shared:ERROR: BINARYEN_ROOT is set to empty value in C:\Users\Jim/.emscripten

the .emscripten file contains the lines:

LLVM_ROOT = os.path.expanduser(os.getenv('LLVM', '/usr/bin')) # directory
BINARYEN_ROOT = os.path.expanduser(os.getenv('BINARYEN', '')) # directory

I am unable to progress and none of the other issues seem to show this. Your help would be appreciated.

[cranei]

Sorry to be a nuisance everyone....
Got it working finally with the tot version - runs like a greyhound!
Please cancel any problem I reported.

[seisvelas]

I'm having the same problem on MacOS. What is the 'tot' version and how do I get it so I can resolve this?

[sbc100]

tot means tip-of-tree. It means the latest emsdk package to have been tests with no failures. Ever now and then we take the current tot verson promote it to an official release (after which it is then available via latest).

You can use either tot or latest by using emsdk. e.g:

emsdk install tot
emsdk activate tot

[bradharms]

I'm getting this as well on WSL (windows subsystem for linux). Installing tot does NOT help.

What is BinaryEn?
Why is it not set in the .emscripten file?

EDIT: Resolved; see below

[sbc100]

I'm not sure we have many WSL users, so there may be some issues there, although my understanding is that it would just work exactly like linux.

Can you tell the commands you used to install emsdk.

Can you include the full command lines and the full output?

[sbc100]

binaryen is one of the dependencies of emscripten. Its a tool for manipulating the WebAssembly binary and text format. It should be packaged with the emsdk and setup for you when emsdk creates the config file for emscripten.

[bradharms]

I resolved it, sort of. I had to install and activate "latest-upstream."

./emsdk install latest-upstream
./emsdk activate latest-upstream

[fmoel]

Please use the emcmdprompt.bat in the emsdk root directory to start the command prompt. This will set up the command prompt correctly and emcc should work even with latest.

[bradharms]

I can't use emcmdprompt.bat because my environment is linux-based.

[sbc100]

On linux you should use source ./emsdk_env.sh.

[JCash]

I can confirm, that the tot-upstream didn't work (as suggested by the documentation), as it complained about BINARYEN.
The latest-upstream worked though. Thx @bradharms !

[sbc100]

Installing tot-upstream should certainly work. Before you install any tot builds you need to first run ./emsdk update-tags. Maybe you didn't do that? Also you don't need the -upstream... just tot is enough.

[Noah1989]

This happens when you try to run emcc after ./emsdk install without activating the SDK through ./emsdk activate first. It will try to generate the .emscripten file automatically, and just leaves BINARYEN_ROOT empty.

[kenorb]

On macOS, I've edited /usr/local/Cellar/emscripten/*/libexec/.emscripten file and replaced the line with BINARYEN_ROOT to BINARYEN_ROOT = '.' (as it was empty).