The Objective-C compiler is based on version 2.7.2 of the GNU C compiler, an ANSI-standard C compiler produced by the Free Software Foundation. The 2.7.2 compiler has been modified and extended as a compiler for the Objective-C language by Apple Computer. This document describes how to compile a C program using the Objective-C compiler.
This chapter is a modified version of documentation provided by the Free Software Foundation; see the section See Legal Considerations at the end of this document for important related information.
This chapter Copyright " 1988, 1989, 1992, 1993, 1994, 1995 by Free Software Foundation, Inc. and Copyright " 1991-1998 by Apple Computer.
The following sections describe command options available when compiling a C program, incompatibilities between C as interpreted by this compiler and non-ANSI versions of C, GNU extensions to the C language, and implementation-specific details related to using C.
For a description of the Objective-C language, see Object-Oriented Programming and the Objective-C Language .