Developer Guide and Reference

Contents

isystem

Specifies a directory to add to the start of the system include path.

Syntax

Linux:
-isystem
dir
macOS:
-isystem
dir
Windows:
None
Arguments
dir
Is the directory to add to the system include path.
Default
OFF
The default system include path is used.
Description
This option specifies a directory to add to the system include path. The compiler searches the specified directory for include files after it searches all directories specified by the
-I
compiler option but before it searches the standard system directories.
On Linux* systems, this option is provided for compatibility with gcc.
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