Developer Guide and Reference

Contents

ffriend-injection

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

Syntax

Linux and macOS:
-ffriend-injection
-fno-friend-injection
Windows:
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.
On Linux systems, in gcc versions 4.1 or later, this is not the default behavior. This option allows compatibility with gcc 4.0 or earlier.
Alternate Options
None

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804