ffriend-injection

Causes the compiler to inject friend functions into the enclosing namespace.

Syntax

Linux OS and OS X:

-ffriend-injection

-fno-friend-injection

Windows OS:

None

Arguments

None

Default

-fno-friend-injection

The compiler does not inject friend functions into the enclosing namespace. A friend function that is not declared in an enclosing scope can only be found using argument-dependent lookup.

Description

This option causes the compiler to inject friend functions into the enclosing namespace, so they are visible outside the scope of the class in which they are declared.

In gcc versions 4.1 or later, this is not the default behavior. This option allows compatibility with gcc 4.0 or earlier.

IDE Equivalent

None

Alternate Options

None