/fpp

Syntax:

/fpp[:"options"]

The /fpp option activates the FPP preprocessor and optionally passes options to FPP as is. The FPP preprocessor can process both free- and fixed-form Fortran source files. Alternatively, you can use compiler directives, such as the IF Directive Construct, to detect symbol definitions and perform conditional compilation.

You can run FPP:

• On the DF command line, by adding the /fpp option. By default, the specified files are compiled and linked. To retain the intermediate (.i or .i90) file, specify the /keep option.
• In the visual development environment, by specifying the Use FPP option in the Preprocessor Compiler Option Category. By default, the file is compiled and linked. To retain the intermediate (.i or .i90) file, specify the /keep option on the command line or (in the visual development environment, Project Settings dialog box) the Project Options: box.
• On the command line, by using the FPP command. In this case, the compiler is not invoked. When using the FPP command line, you need to specify the input file and the output intermediate (.i or .i90) file.

FPP is a modified version of the ANSI C preprocessor and supports a similar set of directives (including syntax and semantics). It supports the following directives: #define, #elif, #else, #endif, #if, #ifdef, #ifndef, #include, and #undef.

For example, the following DF command invokes FPP, specifies the /noC option to FPP, uses the /define option to define the symbol testcase, and preprocesses file cond.for before it is compiled and linked:

  DF /fpp:"/noC" /define:testcase=2 cond.for

For a list of predefined preprocessor symbols (such as _X86_), see /define.

For information on FPP options, type FPP /HELP on the command line.