error while compiling Objective-C simple code

[lucaazori]

Hi, i`m an obj-C beginner, i try to compile my code with shell command but i got this error:

error:Foundation/Foundation.h: No such file or directory

I`m very confused, the GCC is well installed, also the GNUstep, please help, i can`t go on any more, here is my code:

#import <Foundation/Foundation.h>

int main (int argc, const char * argv[])
{
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

    // insert code here...
    NSLog(@"Hello, World!");
    [pool drain];
    return 0;
}

the command that i used to compile is:

gcc -o hello hello.m

the file`s name is "hello".
THANX in advance

[lucaazori]

UP..so..any suggestions please