RTEMS GNU Tools On-Line Library

Header Files

The C Preprocessor

1.3: Header Files

A header file is a file containing C declarations and macro definitions (see Macros) to be shared between several source files. You request the use of a header file in your program with the C preprocessing directive `#include'.

Header Uses What header files are used for.

Include Syntax How to write `#include' directives.

Include Operation What `#include' does.

Once-Only Preventing multiple inclusion of one header file.

Inheritance Including one header file in another header file.

The C Preprocessor