D

Defines a macro name that can be associated with an optional value.

IDE Equivalent

Windows: Preprocessor > Preprocessor Definitions

Linux: Preprocessor > Preprocessor Definitions

OS X: Preprocessor > Preprocessor Definitions

Architectures

All

Syntax

Linux and OS X:

-Dname[=value]

Windows:

/Dname[=value]

Arguments

`name`	Is the name of the macro.
`value`	Is an optional integer or an optional character string delimited by double quotes; for example, D`name=string`.

Default

OFF	Only default symbols or macros are defined.

Description

Defines a macro name that can be associated with an optional value. This option is equivalent to a #define preprocessor directive.

If a value is not specified, name is defined as "1".

If you specify noD, all preprocessor definitions apply only to fpp and not to Intel® Fortran conditional compilation directives. To use this option, you must also specify option fpp.

Caution

On Linux* and OS X* systems, if you are not specifying a value, do not use D for name, because it will conflict with the -DD option.

Alternate Options

None

Example

To define a macro called SIZE with the value 100, enter the following command:

On Windows* systems:

icl /DSIZE=100 prog1.cpp

On Linux* and OS X* systems:

icpc -DSIZE=100 prog1.cpp

If you define a macro, but do not assign a value, the compiler defaults to 1 for the value of the macro.