(cpp-4.1.info)Top (cpp-4.1.info)TopThe C Preprocessor ****************** The C preprocessor implements the macro language used to transform C, C++, and Objective-C programs before they are compiled. It can also be useful on its own.
Overview Header Files Macros Conditionals Diagnostics Line Control Pragmas Other Directives Preprocessor Output Traditional Mode Implementation Details Invocation Environment Variables GNU Free Documentation License Index of Directives Option Index Concept Index--- The Detailed Node Listing --- Overview
Character sets Initial processing Tokenization The preprocessing languageHeader Files
Include Syntax Include Operation Search Path Once-Only Headers Computed Includes Wrapper Headers System HeadersMacros
Object-like Macros Function-like Macros Macro Arguments Stringification Concatenation Variadic Macros Predefined Macros Undefining and Redefining Macros Directives Within Macro Arguments Macro PitfallsPredefined Macros
Standard Predefined Macros Common Predefined Macros System-specific Predefined Macros C++ Named OperatorsMacro Pitfalls
Misnesting Operator Precedence Problems Swallowing the Semicolon Duplication of Side Effects Self-Referential Macros Argument Prescan Newlines in ArgumentsConditionals
Conditional Uses Conditional Syntax Deleted CodeConditional Syntax
Ifdef If Defined Else ElifImplementation Details
Implementation-defined behavior Implementation limits Obsolete Features Differences from previous versionsObsolete Features
Assertions Obsolete once-only headersCopyright (C) 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation. A copy of the license is included in the section entitled "GNU Free Documentation License". This manual contains no Invariant Sections. The Front-Cover Texts are (a) (see below), and the Back-Cover Texts are (b) (see below). (a) The FSF's Front-Cover Text is: A GNU Manual (b) The FSF's Back-Cover Text is: You have freedom to copy and modify this GNU Manual, like GNU software. Copies published by the Free Software Foundation raise funds for GNU development.