Cocoa Newbie Question.

This is my first time compiling objective C and C files together for
one program. All of my files are C files except the main file which is
in objective C called main.m

Here is the code for my boilerplate main implementation file file:

#im****t <Cocoa/Cocoa.h>
#include "defs.h"
#include "data.h"
#include "treenode.h"
#include "fileinout.h"

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

	return 0;
}

All the other .h files in my #includes are C files containing my
functions.

Here is the error I get when I compile:

gcc -Wno-im****t -ansi -pedantic -Wall -O2 -c treenode.c
gcc -Wno-im****t -ansi -pedantic -Wall -O2 -c main.m
main.m:1:2: warning: #im****t is a GCC extension
In file included from /System/Library/Frameworks/AppKit.framework/
Headers/AppKit.h:53,
                 from /System/Library/Frameworks/Cocoa.framework/
Headers/Cocoa.h:13,
                 from main.m:1:
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:72:
error: syntax error before 'unsigned'
make: *** [main.o] Error 1

This is a fairly cryptic error for me but it appears to be associated
with the file #im****t 'ed from the Cocoa framework. What is going on
here?

I am an absolute beginner in using Objective C and I just want to
learn to get this to compile for now.

Thanks.