Compiling erroes when trying to compile Objective-C source file using gcc

installed now, still have the same problem.

Edit: Weirdest thing in the world- it didn't install it. when i ran aptitude again it gave me this crazy solution to resolve conflicts ( including removing build-essential gcc, g++, gcc 4.4, g++ 4.4, and alot of libs ).

Im not sure how smart it is to accept his solution :)

Edit #2: After upgrading system there was no need for solution. compiler is working now, although i have some linking issues: it complains about alot of unidentified refrences ( both of math.h and objc/Object.h ).

Command i ran: gcc try.o (after running gcc -c try.m successfully )

output:

/tmp/ccLnDo1L.o: In function `_i_Point__magnitude':
try.m:(.text+0x91): undefined reference to `sqrt'
/tmp/ccLnDo1L.o: In function `main':
try.m:(.text+0xad): undefined reference to `objc_get_class'
try.m:(.text+0xc0): undefined reference to `objc_msg_lookup'
try.m:(.text+0xe7): undefined reference to `objc_msg_lookup'
try.m:(.text+0x114): undefined reference to `objc_msg_lookup'
try.m:(.text+0x141): undefined reference to `objc_msg_lookup'
try.m:(.text+0x168): undefined reference to `objc_msg_lookup'
/tmp/ccLnDo1L.o:try.m:(.text+0x18f): more undefined references to `objc_msg_lookup' follow
/tmp/ccLnDo1L.o: In function `__objc_gnu_init':
try.m:(.text+0x1dd): undefined reference to `__objc_exec_class'
/tmp/ccLnDo1L.o:(.data+0x190): undefined reference to `__objc_class_name_Object'
collect2: ld returned 1 exit status

files:

try.m:

#import "try.h"
#import <math.h>
#import <stdio.h>
Point

- (id) x: (double) x_value
{
   x = x_value;
   return self;
}

- (double) x
{
   return x;
}

- (id) y: (double) y_value
{
   y = y_value;
   return self;
}

- (double) y
{
   return y;
}

- (double) magnitude
{
   return sqrt(x*x+y*y);
}


int main(void)
{
   Point *point = [Point new];
   [point x:10.0];
   [point y:12.0];
   printf("The distance from the point (%g, %g) to the origin is %g.\n", [point x], [point y], [point magnitude]);

   return 0;
}

try.h:

#import <objc/Object.h>
Point : Object
{
   double x;
   double y;
}

- (id) x: (double) x_value;
- (double) x;
- (id) y: (double) y_value;
- (double) y;
- (double) magnitude;