The Format of the DF Command

This section describes the format of the DF command. It also provides an alphabetical list of DF command options.

The DF command accepts both compiler options and linker options. The command driver requires that the following rules be observed when specifying the DF command:

• Except for the linker options, options can be specified in any order.
• Linker options must be preceded by the keyword /link and must be specified at the end of the command line, following all other options.

The DF command has the following form:

   DF options [/link options]

A list of compiler options (or linker options preceded by the /link option). These lists of options take the following form:

   [/option:[arg]] [filename.ext]...

Where:

/option[:arg]

Indicates either special actions to be performed by the compiler or linker, or special properties of input or output files.

The following rules apply to options and their names:

• Options begin with a slash (/). You can use a dash (-) instead of a slash.
• Visual Fortran options are not case-sensitive. Certain options provided for compatibility with Microsoft Fortran PowerStation options are case-sensitive, such as /FA and /Fafile.
• You can abbreviate option names. You need only enter as many characters as are needed to uniquely identify the option.

Certain options accept one or more keyword arguments following the option name. For example, the /warn option accepts several keywords, including argument_checking and declarations.

To specify only a single keyword, specify the keyword after the colon (:). For example, the following specifies the /warn option declarations keyword:

   DF /warn:declarations test.f90

To specify multiple keywords, specify the option name once, and place each keyword in a comma-separated list enclosed within parentheses with no spaces between keywords, as follows:

   DF /warn:(argument_checking,declarations)  test.f90

Instead of the colon, you can use an equal sign (=):

   DF /warn=(argument_checking,declarations)  test.f90

filename.ext

Specifies the files to be processed. You can use wildcard characters (such as *.f90) to indicate multiple files or you can specify each file name.

The file extension identifies the type of the file. With Fortran source files, certain file extensions indicate whether that source file contains source code in free (such as .f90) or fixed (such as .for) source form. You can also specify compiler options to indicate fixed or free source form (see /[no]free).

The file extension determines whether that file gets passed to the compiler or to the linker. For example, files myfile.for and projfile.f are passed to the compiler and file myobj.obj is passed to the linker.

Compiler Options, Alphabetic List

The following table lists the DF command compiler options alphabetically:

For more information:

• On DF command examples, see Examples of the DF Command Format
• On compiler option categories, see Categories of Compiler Options
• On using the FL32 command, see Microsoft Fortran PowerStation Command-Line Compatibility
• About Fortran PowerStation options (such as /MD) and their DF command equivalents, see Equivalent Visual Fortran Compiler Options