# fmerge-constants

Determines whether the compiler and linker attempt to merge identical constants (string constants and floating-point constants) across compilation units.

## Syntax

Linux: | -fmerge-constants -fno-merge-constants

macOS: | None

Windows: | None

## Arguments

None

## Default

-fmerge-constants | The compiler and linker attempt to merge identical constants across compilation units if the compiler and linker supports it.

## Description

This option determines whether the compiler and linker attempt to merge identical constants (string constants and floating-point constants) across compilation units.

If you do not want the compiler and linker to attempt to merge identical constants across compilation units. specify -fno-merge-constants.

## IDE Equivalent

None

## Alternate Options

None

Parent topic: Output, Debug, and Precompiled Header (PCH) Options