WasmGNUDiff

Port GNU’s diffutils-3.8 to wasm using emscripten.

Steps to build diff.wasm

Environment: macOS Monterey 12.3.1, Xcode 13.3, x86_64

git clone https://github.com/juj/emsdk.git
cd emsdk

./emsdk install latest
./emsdk activate latest
source ./emsdk_env.sh

wget https://ftp.gnu.org/gnu/diffutils/diffutils-3.8.tar.xz
wget https://ftp.gnu.org/gnu/diffutils/diffutils-3.8.tar.xz.sig

mkdir diffutils
tar xzvf diffutils-3.8.tar.xz -C diffutils
cd diffutils/diffutils-3.8

emconfigure ./configure
emmake make
cp src/diff.wasm ../../

Issues

If you encounter the problem emscripten-core/emscripten#12415:

• Locate line configure:44001, insert return 0; before this line.
• Locate line configure:42282, insert return 0; before this line.