These options affect how GNU Fortran searches
for files specified by the INCLUDE directive and where it searches
for previously compiled modules.
It also affects the search paths used by cpp when used to preprocess
Fortran source.
-IdirThese affect interpretation of the INCLUDE directive
(as well as of the #include directive of the cpp
preprocessor).
Also note that the general behavior of -I and
INCLUDE is pretty much the same as of -I with
#include in the cpp preprocessor, with regard to
looking for header.gcc files and other such things.
This path is also used to search for .mod files when previously
compiled modules are required by a USE statement.
See Options for Directory Search in Using the GNU Compiler Collection (GCC), for information on the -I option.
-JdirThis option specifies where to put .mod files for compiled modules.
It is also added to the list of directories to searched by an USE
statement.
The default is the current directory.
-fintrinsic-modules-path dirThis option specifies the location of pre-compiled intrinsic modules, if they are not in the default location expected by the compiler.