See the documentation about installing tooling: https://learn.golem.cloud/docs/ccpp-language-guide/setup
Generate bindings from WIT:
wit-bindgen c --autodrop-borrows yes --out-dir component_name ./wit
Compile the C code with WASI SDK (set WASI_SDK_PATH where wasi-sdk-25.0 is installed):
$WASI_SDK_PATH/bin/clang --sysroot $WASI_SDK_PATH/share/wasi-sysroot main.c component_name/component_name.c component_name/component_name_component_type.o -o component_name.module.wasm
Convert the result into a Component:
wasm-tools component new component_name.module.wasm -o component_name.wasm --adapt adapters/tier1/wasi_snapshot_preview1.wasm
A Makefile is provided to automate the process:
export WASI_SDK_PATH=...
make build