| The GNU C Preprocessor

This part of the documentation is a modified version of the GNU CPP Manual. Therefore it is licensed under the GNU Free Documentation License.
The C preprocessor is a macro processor that is used automatically by the C compiler to transform your program before actual compilation. It is called a macro processor because it allows you to define macros, which are brief abbreviations for longer constructs.

- Preprocessor Overview
- Header Files
- Macros
- Conditionals
- Pragmas
- Other Directives
- User-defined Diagnostics
- Line Control
- Preprocessor Output
- C Preprocessor Command-Line Options
- Traditional Mode
- Implementation Details
- History
- GNU General Public License
- GNU Free Documentation License
- Funding Free Software

Original author: Free Software Foundation, Inc.
Authors of the modifications: Zeljko Juric, Sebastian Reichelt, and Kevin Kofler
Published by the TIGCC Team.
See the History section for details and copyright information.
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.