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Compiler Option D
Paul Squires edited this page Oct 14, 2026
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Home › Compiler Option: -d
Add a preprocessor definition
Syntax
-d < name=value >
-d < name >Parameters
name
Name of the preprocessor macro to define. No parameters are allowed.
value
Value to give to the macro. If omitted, it will be defined as 1
Description
The -d compiler option adds a preprocessor macro to all source files. The same as using the preprocessor directive #define or #macro.
See also
Reproduced from the FreeBASIC Wiki Manual under the GNU Free Documentation License 1.3 — with no Invariant Sections, no Front-Cover Texts and no Back-Cover Texts. Copyright © the FreeBASIC project and wiki contributors. See License.
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