objctest.go

package main

/*
#cgo CFLAGS: -x objective-c
#cgo LDFLAGS: -framework Cocoa
#import <Cocoa/Cocoa.h>

void call_objc_example(void) {
    NSLog(@"from objective-c");
}

*/
import "C"

func main() {
	C.call_objc_example()
}