C entrypoint in Go

args.go

package main

/*
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

typedef char** args_t;

args_t args_new(int n) {
	args_t args = malloc(n * sizeof(char*));
	if (args == NULL)
		exit(-1);
	return args;
}

void args_set(args_t args, int i, char* str) {
	args[i] = strdup(str);
}

void args_free(int n, args_t args) {
	for (int i = 0; i < n; ++i)
		free(args[i]);
	free(args);
}

int notmain(int argc, char* argv[]) {
	for (int i = 0; i < argc; ++i) {
		printf("%d - %s\n", i, argv[i]);
	}
	return argc;
}
*/
import "C"
import (
	"os"
	"unsafe"
)

func main() {
	argc := C.int(len(os.Args))
	argv := C.args_new(argc)
	defer C.args_free(argc, argv)

	for i, it := range os.Args {
		cstr := C.CString(it)
		C.args_set(argv, C.int(i), cstr)
		C.free(unsafe.Pointer(cstr))
	}

	os.Exit(int(C.notmain(argc, argv)))
}