testgo.c

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

extern char* go_add(char*, char*) __asm__ ("example.main.Add");

char* __go_string_plus(char *a, char *b) {
	char *c = malloc((strlen(a) + strlen(b) + 1));
	strcat(c, a);
	strcat(c, b);
	return c;
}

int main() {
  char *x = go_add("hi ", "there");
  printf("Result: %s\n", x);
  free(x);
}