type Dysymtab struct {
        LoadBytes
        DysymtabCmd
        IndirectSyms []uint32 // indices into Symtab.Syms
}

#include <stdio.h>
int main(void){
    puts("Hello World");
}

/*
$ gcc foo.c -o foo
$ gcc -v
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 6.0 (clang-600.0.57) (based on LLVM 3.5svn)
Target: x86_64-apple-darwin14.1.0
Thread model: posix
*/

package main

import (
    "debug/macho"
    "fmt"
    "os"
)

func main(){

    for _, path := range os.Args[1:] {

        file, err := macho.Open(path)
        if err != nil {
            fmt.Printf("error: could not open macho file: %v - %v\n", path, err)
            os.Exit(1)
        }
        defer file.Close()

        fmt.Printf("Dysymtab for %v\n", path)
        for _, index := range file.Dysymtab.IndirectSyms {
            if index < uint32(len(file.Symtab.Syms)) {
                fmt.Println(file.Symtab.Syms[index].Name)
            } else {
                fmt.Printf("wtf? >>>>>> %v, max = %v\n", index, len(file.Symtab.Syms))
            }
        }

    }
}

$ go run testcase.go a.out  | grep wtf
wtf? >>>>>> 1073741824, max = 4