gistfile1.txt

$ go run scratch.go
# command-line-arguments
In file included from ./scratch.go:5:
/usr/local/include/librsync.h:367:21: error: unknown type name 'FILE'
void rs_mdfour_file(FILE *in_file, char *result);
                    ^
/usr/local/include/librsync.h:369:23: error: unknown type name 'FILE'
rs_result rs_sig_file(FILE *old_file, FILE *sig_file,
                      ^
/usr/local/include/librsync.h:369:39: error: unknown type name 'FILE'
rs_result rs_sig_file(FILE *old_file, FILE *sig_file,
                                      ^
/usr/local/include/librsync.h:372:27: error: unknown type name 'FILE'
rs_result rs_loadsig_file(FILE *, rs_signature_t **, rs_stats_t *);
                          ^
/usr/local/include/librsync.h:376:43: error: unknown type name 'FILE'
rs_result rs_delta_file(rs_signature_t *, FILE *new_file, FILE *delta_file, rs_stats_t *);
                                          ^
/usr/local/include/librsync.h:376:59: error: unknown type name 'FILE'
rs_result rs_delta_file(rs_signature_t *, FILE *new_file, FILE *delta_file, rs_stats_t *);
                                                          ^
/usr/local/include/librsync.h:378:25: error: unknown type name 'FILE'
rs_result rs_patch_file(FILE *basis_file, FILE *delta_file, FILE *new_file, rs_stats_t *);
                        ^
/usr/local/include/librsync.h:378:43: error: unknown type name 'FILE'
rs_result rs_patch_file(FILE *basis_file, FILE *delta_file, FILE *new_file, rs_stats_t *);
                                          ^
/usr/local/include/librsync.h:378:61: error: unknown type name 'FILE'
rs_result rs_patch_file(FILE *basis_file, FILE *delta_file, FILE *new_file, rs_stats_t *);
                                                            ^
9 errors generated.

scratch.go

package main

/*
#include <stdlib.h>
#include <librsync.h>
*/
import "C"

import (
	"fmt"
)

func main() {
	fmt.Printf("%d", C.random())
}