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* Adds command-line argument to build-js.sh for specifying the location of Emscripten. Also spreads out program arguments on separate lines
* Exposes WasmBinaryWriter and BufferWithRandomAccess in the JS API to allow writing WASM modules and access the produced bytes via the JS API
* Updates bin/binaryen.js and bin/wasm.js from changes to build-js.sh
* Adds exclude patterns to .gitignore for some files generated by build-js.sh and .DS_Store for macOS
* Changes build-js.sh to use EMSCRIPTEN env var instead of a command-line argument to provide the path to emscripten
* Improvements to JS builds
- Adds -g flag to build-js.sh that will build unoptimized and unmangled versions of binaryen.js and wasm.js (output has a "-g.js" suffix to allow co-existence with regular optimized builds).
- Enables closure compiler for non-debug builds
- Adds browser test for s-expression parser + WASM code gen (requires wasm to be enabled in the browser.)
- Adds iterator interface to BufferWithRandomAccess (when Symbol.iterator is available)
- Adds toArrayBuffer to BufferWithRandomAccess (when TypedArray is available)
- Adds compileWast(sourceText :string) :ArrayBuffer to the module, parsing & compiling s-expression code to a WASM module
- Changes the way binaryen.js is exported to allow usage in CommonJS, AMD and UMD envionments.
* Expose "Binaryen" global in a better way to work with a.js generated by check.py
* Fix to binaryen.js to only export a global variable when running the test (a.js) while inside a module (avoids polluting global in e.g. nodejs). Also fixes a spelling mistake.
* Better "no WASM detected" message in test/binaryen.js/browser.html
* Small change to error message in build-js.sh where $EMSCRIPTEN does not point to a directory
* Changes emcc args in build-js.sh after investingating a large number of argument combinations. Also adds a browser benchmark. The result of emcc arguments and the effect on performance is summarized in this doc: https://gist.github.com/rsms/e33c61a25a31c08260161a087be03169
* Enable inferring emscripten path by looking in PATH when EMSCRIPTEN is not set in env
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