hello3.c file from https://developer.mozilla.org/en-US/docs/WebAssembly/C_to_wasm

hello3.c

#include <stdio.h>
#include <emscripten/emscripten.h>

int main(int argc, char ** argv) {
    printf("Hello World\n");
}

#ifdef __cplusplus
extern "C" {
#endif

void EMSCRIPTEN_KEEPALIVE myFunction(int argc, char ** argv) {
    printf("MyFunction Called\n");
}

#ifdef __cplusplus
}
#endif