3.4.46 –Ipath

Add path to the INCLUDE file search path.

Insert the directory path path at the start of the INCLUDE file search path. No space is allowed between -I and path. Invalid directories are ignored with no warning message.

The include file search path is the list of directories searched for INCLUDE files—file names appearing on preprocessor #include directives, or Fortran INCLUDE statements.

Example: Search for INCLUDE files in /usr/app/include:

demo% f95 -I/usr/app/include growth.F

Multiple -Ipath options may appear on the command line. Each adds to the top of the search path list (first path searched).

The search order for relative paths on INCLUDE or #include is:

1. The directory that contains the source file

2. The directories that are named in the -I options

3. The directories in the compiler’s internal default list

4. /usr/include/

To invoke the preprocessor, you must be compiling source files with a .F, .F90, .F95, or .F03 suffix.