Objective-C hello world, cmd line compile

$ vi hello.m

$ cat hello.m

#import <Foundation/Foundation.h>

int main (int argc, const char * argv[])

{

NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

NSLog (@"Hello world!!");

[pool drain];

return 0;

}

$ gcc -framework Foundation hello.m -o hello

$ ./hello

2010-12-10 15:27:00.815 hello[20293:903] Hello world!!