New in version 3.18.

Control whether the Fortran source file should be unconditionally preprocessed.

If unset or empty, rely on the compiler to determine whether the file should be preprocessed. If explicitly set to OFF then the file does not need to be preprocessed. If explicitly set to ON, then the file does need to be preprocessed as part of the compilation step.

When using the Ninja generator, all source files are first preprocessed in order to generate module dependency information. Setting this property to OFF will make Ninja skip this step.

Use the source-specific Fortran_PREPROCESS property if a single file needs to be preprocessed. If the variable CMAKE_Fortran_PREPROCESS is set when a target is created its value is used to initialize this property.


For some compilers, NAG, PGI and Solaris Studio, setting this to OFF will have no effect.