HP C A.06.05 Reference Manual

Preprocessing Directives

Pragma Directive (#pragma)

Chapter 7 199

Pragma Directive (#pragma)

You can provide instructions to the compiler through inclusion of pragmas.

Syntax

pragma-directive

::=

#pragma

replacement-list

Description

The #pragma preprocessing directive provides implementation-dependent information to the

compiler. See Chapter 9, “Compiling and Running HP C Programs,” on page 207 for

descriptions of pragmas recognized by HP C/HP-UX. Any pragma that is not recognized by

the compiler is ignored.

Example

#pragma OPTIMIZE ON

#pragma OPTIMIZE OFF

This pragma is used to toggle optimization on/off for different sections of source code as these

pragmas are encountered in a top to bottom read of a source ﬁle.