Developer Guide and Reference

Contents

Specifying Include Files

The Intel® C++ Compiler searches the default system areas for include files and items specified by the
I
compiler option. The compiler searches directories for include files in the following order:
  1. Directories specified by the
    I
    option
  2. Directories specified in the environment variables
  3. Default include directories
Use the
X
option to remove the default directories from the include file search path.
For example, to direct the compiler to search the path
/alt/include
instead of the default path, do the following:
Example
//
Linux*
and
macOS*
icpc -X -I/alt/include prog1.cpp
//
Windows*
icl /X /I\alt\include prog1.cpp