wasmerio / wasmer-c-api

Example of the C API to embed the Wasmer runtime

Note: This repository is outdated and archived. It showcased the deprecated Wasmer C API. The new C API lands in the Wasmer repository with its examples and its online documentation.

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C-API Embedder App Example

This repo showcases how to use the wasmer-runtime-c-api from C.

The documentation containing installation instructions, and additional examples can be found at the Wasmer C/C++ Integration Documentation.

See wasmer-c-api-example.c and wasmer-wasi-c-api-example.c for the example implementations.

The wasm-sample-app and wasmer-wasi-c-api-example directories contain example C wasm apps to run in the embedder app.

Requirements

• CMake
• Emscripten to build the sample app

Building & Running

# Building the wasm-sample-app
cd wasm-sample-app && emcc source.c  -Os -s SIDE_MODULE=1 -s EXPORTED_FUNCTIONS="['_hello_wasm']" -o target.wasm

# Building the wasm-wasi-sample-app
cd wasmer-wasi-c-api-example && wasicc program.c -Oz -o program.wasm -Wl,--allow-undefined -Wl,--export-all

# Build the embedder api
cmake .
make

# Run the executables
./wasmer-c-api-example
./wasmer-wasi-c-api-example

Reference API Documentation

The Reference API for the Wasmer C API can be found here.