Adds WASM backend support.

.github/workflows/main.yml

@@ -0,0 +1,28 @@
+name: Build
+
+on:
+  push:
+    branches: master
+  pull_request:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: cachix/install-nix-action@v31
+        with:
+          github_access_token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build using 9.12.2 JS backend
+        run: nix develop .#ghcjs --command bash -c "make js"
+
+      - name: Build using 9.12.2 WASM backend
+        run: nix develop .#wasm --command bash -c "make"

Makefile

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+.PHONY= update build clean buildjs
+
+all: update build
+
+js: clean buildjs
+
+update:
+	wasm32-wasi-cabal update
+
+build:
+	wasm32-wasi-cabal build 
+
+clean:
+	cabal clean 
+
+buildjs:
+	cabal build ghcjs-base --with-compiler=javascript-unknown-ghcjs-ghc --with-hc-pkg=javascript-unknown-ghcjs-ghc-pkg
+
+testjs:
+	cabal build exe:tests --with-compiler=javascript-unknown-ghcjs-ghc --with-hc-pkg=javascript-unknown-ghcjs-ghc-pkg --with-hsc2hs=javascript-unknown-ghcjs-hsc2hs