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Compiler Option Forcelang

Paul Squires edited this page Oct 14, 2026 · 3 revisions

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Compiler Option: -forcelang

Provides QuickBASIC or backward compatibility

Syntax

-forcelang dialect

Parameters

dialect

The dialect to use in compilation, one of fb (default), fblite, qb or deprecated.

Description

The -forcelang compiler option changes the way source code is interpreted, and is meant as a tool to users wanting traditional QuickBASIC-like behavior, or behavior deprecated from previous versions of FreeBASIC. It overrides any #lang statements within the code.

The intrinsic macro __FB_LANG__ is set to the string name of the dialect specified on the command line, or "fb" by default.

To learn more about the differences between each of these language dialects, see Compiler Dialects.

fb

This is the default dialect, and allows compilation of source code adhering to the most recent version of the FreeBASIC language.

fblite

This dialect provides support for FreeBASIC syntax and functionality, but with a more traditional QuickBASIC programming style.

qb

This dialect provides the best support for older QuickBASIC code.

deprecated

This dialect is for backward compatibility with some previous versions of FreeBASIC, however, this dialect may not exist in future versions. Programmers should consider using the "fblite" dialect instead.

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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