emcc command not found #5696

caperavensoftware · 2017-10-22T18:58:08Z

Having a hell of a time getting emcc working on mac.
Having followed and ensured that all the requirements are installed, i can't seem to get emcc to run outside of the installed folder getting a command not found.

Are these steps correct?
http://webassembly.org/getting-started/developers-guide/

trzecieu · 2017-10-22T19:53:56Z

Hi, if you're inside emsdk folder please type:

source ./emsdk_env.sh
emcc --version

What output do you see?

caperavensoftware · 2017-10-23T05:34:06Z

source:

Adding directories to PATH:
PATH += /Users/username/Documents/GitHub/webassembly/emsdk
PATH += /Users/username/Documents/GitHub/webassembly/emsdk/clang/e1.37.22_64bit
PATH += /Users/username/Documents/GitHub/webassembly/emsdk/node/4.1.1_64bit/bin
PATH += /Users/username/Documents/GitHub/webassembly/emsdk/emscripten/1.37.22

Setting environment variables:
EMSDK = /Users/username/Documents/GitHub/webassembly/emsdk
EM_CONFIG = /Users/username/.emscripten
BINARYEN_ROOT = /Users/username/Documents/GitHub/webassembly/emsdk/clang/e1.37.22_64bit/binaryen
EMSCRIPTEN = /Users/username/Documents/GitHub/webassembly/emsdk/emscripten/1.37.22

for the version I get this

emcc (Emscripten gcc/clang-like replacement) 1.37.22 (commit 024e3bb3b4d1860c46c2c887aad868db7053fe1a)
Copyright (C) 2014 the Emscripten authors (see AUTHORS.txt)
This is free and open source software under the MIT license.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

when I do emcc -v outside that folder I get this

-bash: emcc: command not found

gogoprog · 2017-10-23T08:27:10Z

You always have to source ./emsdk_env.sh first in a new terminal session

caperavensoftware · 2017-10-23T08:34:52Z

ok, that makes sense now, ty

hon · 2017-10-23T08:38:24Z

@gogoprog why do we need to that all the time in a new terminal session? it is so boring.

gogoprog · 2017-10-23T08:42:54Z

@hon because there is nothing set magically: your default PATH doesn't contain the emcc path so it has to be set.

But of course you can set that up once for all by automatically calling the source ./emsdk_env.sh in your session startup script. Look for .bashrc configuration if you're using bash (I guess that's the case on OsX)

hon · 2017-10-23T10:25:20Z

@gogoprog does't source ./emsdk_env.sh set env path?

which emcc
/Users/hon/work/emsdk-portable/emscripten/incoming/emcc

and the '/Users/hon/work/emsdk-portable/emscripten/incoming/emcc' is already set into $PATH (in .zshrc file)

but it does't work...

trzecieu · 2017-10-23T10:33:50Z

PATH contains directories instead of file paths.
After source ./emsdk_env.sh type echo $PATH to see how it's populated.

gogoprog · 2017-10-23T11:02:37Z

@hon yes source ./emsdk_env.sh will set the PATH.

How is it set in your .zshrc file?

hon · 2017-10-24T01:46:39Z

@gogoprog

➜  emsdk-portable echo $PATH
./node_modules/.bin:/usr/local/share/npm/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/hon/work/go/bin:/usr/local/go/bin:/usr/local/nginx/sbin:/Users/hon/.cargo/bin:/Users/hon/Library/Android/sdk/build-tools/23.0.1:/Users/hon/rust/src:/Users/hon/Library/Android/sdk/tools:/Users/hon/Library/Android/sdk/platform-tools:/usr/local/bin:/usr/include/libxml2/:/Users/hon/work/emsdk-portable:/Users/hon/work/emsdk-portable/clang/fastcomp/build_incoming_64/bin:/User/hon/work/emsdk-portable/emscripten/incoming:/Users/hon/work/emsdk-portable/emscripten/incoming/emcc
➜  emsdk-portable emcc
zsh: command not found: emcc
➜  emsdk-portable

the binary file is set in $PATH, but can not work.

trzecieu · 2017-10-24T06:26:25Z

@hon You should add /Users/hon/work/emsdk-portable/emscripten/incoming/ to the PATH as a folder what contains emcc, not a full path to emcc.

gogoprog · 2017-10-24T07:08:55Z

Also you better just do the following in your .zshrc:

pushd path/to/emsdk
source ./emsdk_env.sh
popd

So the PATH will be correctly set

hon · 2017-10-24T08:42:22Z

@asria folder /Users/hon/work/emsdk-portable/emscripten/incoming/ is alreay in $PATH
@gogoprog I add the commands, but I need to type the following command in every new session:

. ~/.zshrc

what I wondering now is: the function of env path is make some binary file can be executed everywhere in the system, with out type the full path. since the path was in the $PATH, why
can't it be executed?
Sorry for so many questions. I never met the situation before(I have to source .sh file every time
to make some command work).

trzecieu · 2017-10-24T08:51:11Z

Maybe you don't use ZSH, but the regular bash? Can you type ps -p $$ and check the output?
If it's a bash, then it's needed to change .bashrc file

hon · 2017-10-24T08:52:52Z

@asria

➜  emscripten ps -p $$
  PID TTY           TIME CMD
33664 ttys001    0:00.58 -zsh

trzecieu · 2017-10-24T08:57:33Z

Hm.. Interesting. Last call: in .zshrc please just leave:

. /Users/hon/work/emsdk-portable/emsdk_env.sh

hon · 2017-10-24T09:07:11Z

Now it works, but every time in a new session, the console outputs:

Last login: Tue Oct 24 17:03:49 on ttys004
~/work/emsdk-portable ~
Adding directories to PATH:
PATH += /Users/hon/work/emsdk-portable/node/4.1.1_64bit/bin
PATH += /Users/hon/work/emsdk-portable/emscripten/incoming

Setting environment variables:
EMSDK = /Users/hon/work/emsdk-portable
EM_CONFIG = /Users/hon/.emscripten
EMSCRIPTEN = /Users/hon/work/emsdk-portable/emscripten/incoming

/Users/hon/.zshrc:popd:151: directory stack empty
➜  ~

trzecieu · 2017-10-24T09:44:18Z

If you use the absolute path and . the popd and pushd commands aren't needed.

hon · 2017-10-24T09:49:49Z

ok, ty~

sfjadi2010 · 2018-07-20T02:30:59Z

I have same issue, did everything but not able to fix it tonight.

posthighline · 2018-07-23T17:50:52Z

I have the same issue too. I followed this guide perfectly, it seems like it's incomplete:
https://webassembly.org/getting-started/developers-guide/

kripken · 2018-07-23T20:49:56Z

Is the issue that source ./emsdk_env.sh needs to be run after install and activate? That does seem to be missing on the webassembly.org instructions (but is present on the emscripten docs).

If that's it, I can open a PR to update their docs, but please let me know if that is indeed what's wrong.

sfjadi2010 · 2018-07-23T20:59:36Z

@kripken I tried emscripten docs too, but it seems not working.

kripken · 2018-07-23T22:29:15Z

That's strange.

To see if it's not something with how the PATH is set up, you can call emcc directly, without assuming it is in your path. If you are in the emsdk dir, you can find it with something like

$ find -name emcc.py
./emscripten/1.38.1/emcc.py

And can then run it with copying that last line, in this example, ./emscripten/1.38.1/emcc.py

Samuelfaure · 2018-09-13T08:45:11Z

For anyone having issues :
If you moved your emsdk folder after you ran ./emsdk activate --build=Release sdk-incoming-64bit binaryen-master-64bit the sourcing wont work and you need to rerun this command.

kmturley · 2018-10-17T17:49:02Z

I solved by adding this line to my .bash_profile file:

# Web Assembly paths
source "/Users/${USER}/Sites/emsdk/emsdk_env.sh"

eyworldwide · 2019-05-21T12:11:39Z

Now it works, but every time in a new session, the console outputs:

Last login: Tue Oct 24 17:03:49 on ttys004
~/work/emsdk-portable ~
Adding directories to PATH:
PATH += /Users/hon/work/emsdk-portable/node/4.1.1_64bit/bin
PATH += /Users/hon/work/emsdk-portable/emscripten/incoming

Setting environment variables:
EMSDK = /Users/hon/work/emsdk-portable
EM_CONFIG = /Users/hon/.emscripten
EMSCRIPTEN = /Users/hon/work/emsdk-portable/emscripten/incoming

/Users/hon/.zshrc:popd:151: directory stack empty
➜  ~

You need not to see these ugly logs every time when open a bash.

The issue is because the command source ./emsdk_env.sh export path failed. I digged into the shell code but I could not fix it. However, I can add the path to the .profile file (which is in your user directory of the system) manually:

open the emsdk_set_env.sh with any text editor, copy the first line of the code, for me, it is:

export PATH="/Users......Frameworks/Mono.framework/Versions/Current/Commands"
open '~/.profile', then paste the code:

export PATH="/Users......Frameworks/Mono.framework/Versions/Current/Commands:${PATH}

Be careful, add :${PATH} in the end. Because we only want to add path other than cover the global paths.

eliottparis · 2019-06-29T13:59:51Z

Adding this to .zshrc/.bash_profile did the trick for me on macOS (set the emcc paths for new terminal sessions and hiding output logs):

source ~/path-to-emsdk/emsdk_env.sh &> /dev/null

Ayan-web · 2021-05-21T12:45:41Z

add
source ./emsdk_env.sh
to .bashrc or zshrc file

cool-delete · 2021-08-04T23:01:17Z

Until now, I found the issue
source ./emsdk_env.sh
echo ${EMSDK}
get ""

joshxyzhimself · 2021-08-10T00:09:55Z

what worked in my case, is just login as root

# login as root
sudo -s

# deps
apt install python3
apt install cmake

# prep emsdk
git clone git@github.com:emscripten-core/emsdk.git
cd emsdk
./emsdk install latest
./emsdk activate latest
source ./emsdk_env.sh
cd ../

# compile example-project
mkdir example-project
cd example-project
emcmake cmake ../some-wasm-wrapper-dir/
cmake --build ./

tsavo-at-pieces · 2022-09-15T02:00:16Z

Just a heads up for peeps. Installed via brew https://formulae.brew.sh/formula/emscripten#default and it all worked great out of the box. Worth a shot!

KangChou · 2022-09-15T03:42:55Z

emcc --version

emcc --version
emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 3.1.21 (f9e8147)
Copyright (C) 2014 the Emscripten authors (see AUTHORS.txt)
This is free and open source software under the MIT license.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

LakshmiMounika29 · 2023-08-12T01:34:22Z

source ./emsdk_env.sh
emcc --version

instead of using this try for windows
cd WHERE/YOU/INSTALLED/EMSCRIPTEN
emsdk update
emsdk install latest
emsdk activate latest
emsdk_env.bat
emcmdprompt.bat

shubham0204 · 2024-01-07T02:31:21Z

In my case, I had not used the activate command, which resulted in a bash: command not found even after setting the environment variables in .bashrc,

# Make the "latest" SDK "active" for the current user. (writes .emscripten file)
./emsdk activate latest

caperavensoftware closed this as completed Oct 23, 2017

briefy mentioned this issue Apr 16, 2018

emcc -- command not found #6447

Closed

eyworldwide mentioned this issue May 25, 2019

mac emcc: command not found WebAssembly/design#1256

Closed

emcc command not found #5696

emcc command not found #5696

Comments

caperavensoftware commented Oct 22, 2017

trzecieu commented Oct 22, 2017

caperavensoftware commented Oct 23, 2017

gogoprog commented Oct 23, 2017

caperavensoftware commented Oct 23, 2017

hon commented Oct 23, 2017

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