Updating JerryScript
Currently we use Jerryscript version v2.4 from JerryScript, imported as a submodule.
The web-assembly (WASM) snapshot compiler uses the emscripten SDK.
Update
In order to update the version of JerryScript two tasks have to be executed:
In this repository update the submodule version of JerryScript to point to the new version
Rebuild the snapshot compiler
The snapshot compiler can be rebuilt manually as follows:
Install the emscripten SDK:
git clone --depth 1 https://github.com/emscripten-core/emsdk.git emsdk emsdk/emsdk install latest emsdk/emsdk activate latest
run
make
from theemscripten-snapshot-compiler
directory.
The following three files are generated in emscripten-snapshot-compiler/build/bin/{PROFILE}
:
jsc.js
jsc.wasm
jsc.wasm.map
Copy these to the jsc
sub-directory for application use as demonstrated in the Advanced_Jsvm
sample.
Dockerfile
The snapshot compiler can be rebuilt using a Docker container which also includes a WebAssembly toolkit. It can be built and run with the following commands:
docker build -f Dockerfile -t jerryscript-ems .
docker run -it jerryscript-ems
Inside the container a new jerryscript snapshot compiler can be built by calling:
node /jerryscript/build/bin/minimal/jsc.js -o /tmp/test.js.snap /tmp/test.js
Where test.js.snap
is the output file and /tmp/test.js
is an existing JavaScript file.
To update the jsc.*
files you run the following from the application directory:
docker run -v $(pwd)/files/web/:/web -it jerryscript-ems
And run the following commands inside the container:
cp -r /jerryscript/build/bin/minimal/jsc.* /web
The build system handles compilation of the main.js
file,
but if you prefer to use pre-compiled snaps this can also be done inside the container:
node /jerryscript/build/bin/minimal/jsc.js -o /web/main.js.snap /web/main.js