CMake/Help/prop_sf/Fortran_FORMAT.rst

Fortran_FORMAT
--------------

Set to ``FIXED`` or ``FREE`` to indicate the Fortran source layout.

This property tells CMake whether a given Fortran source file uses
fixed-format or free-format.  CMake will pass the corresponding format
flag to the compiler.  Consider using the target-wide
:prop_tgt:`Fortran_FORMAT` property if all source files in a target
share the same format.