Update pyodide.yml

Author: NikolajBjorner

.github/workflows/pyodide.yml

@@ -34,7 +34,7 @@ jobs:
       run:  git clone https://github.com/emscripten-core/emsdk.git ~/emsdk && cd ~/emsdk && PYODIDE_EMSCRIPTEN_VERSION=$(~/env/bin/pyodide config get emscripten_version) && ./emsdk install ${PYODIDE_EMSCRIPTEN_VERSION} && ./emsdk activate ${PYODIDE_EMSCRIPTEN_VERSION}
 
     - name: Build Z3
-      run: source ~/emsdk/emsdk_env.sh && cd src/api/python && ~/env/bin/pyodide build --exports whole_archive
+      run: source ~/emsdk/emsdk_env.sh && cd src/api/python && CFLAGS="-fexceptions" LDFLAGS="-fexceptions" ~/env/bin/pyodide build --exports whole_archive
 
     - name: Setup env-pyodide
       run: source ~/env/bin/activate && source ~/emsdk/emsdk_env.sh && pyodide venv ~/env-pyodide