'Undefined symbols for architecture x86_64'

[gofire]

 I am trying to use enet through C with cgo

package main

import(

/*

#include "enet.h"

*/

"C"

"fmt"

)

func main() {

if C.enet_initialize() != 0 {

fmt.Println("ok")

}

C.enet_deinitialize()

}

and i got this error

# command-line-arguments

Undefined symbols for architecture x86_64:

  "_enet_deinitialize", referenced from:

      __cgo_04342578f756_Cfunc_enet_deinitialize in cgo.cgo2.o

     (maybe you meant: __cgo_04342578f756_Cfunc_enet_deinitialize)

  "_enet_initialize", referenced from:

      __cgo_04342578f756_Cfunc_enet_initialize in cgo.cgo2.o

     (maybe you meant: __cgo_04342578f756_Cfunc_enet_initialize)

ld: symbol(s) not found for architecture x86_64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

[Ian Lance Taylor]

I don't know what enet is, but you most likely need something like

#cgo LDFLAGS: -lenet

in the comment preceding "C". That is, you need to tell the linker to
link against the enet library.

Ian

[alexandru...@gmail.com]

I just want to add that for mac/osx/darwin, in order to use an external framework with cgo and avoid this error you can do the following:

package main

// To import the CoreGraphics.framework
import (
    // #cgo LDFLAGS: -framework CoreGraphics
    // #include <CoreGraphics/CoreGraphics.h>
    "C"
    // other packages...
)

func main() {
    display := C.CGMainDisplayID()
    fmt.Println(display)
    fmt.Println(C.CGDisplayCreateImage(display))
}