Description files can use a special syntax to determine the drive, path, base name, and extension of the first dependent file in a description block. This syntax is called the "extmake" syntax.

The characters %s represent the complete file specification of the first dependent file. Various parts of the file specification are represented using the syntax:

     %|<parts>F

where <parts> is any combination of the following letters:

d

Drive
p
Path
f
Base name
e
Extension

The percent symbol (%) is a replacement in the OS/2 command line. To use the percent symbol in the command-line arguments, use a double percent (%%).

Example:

Using the following description file excerpt:

         d:\path\filename.ext         @echo"%%s" is "%s" and "%%|dpfeF" is "%|dpfeF"

The following would be displayed:

         "%s" is "d:\path\filename.ext" and "%|dpfeF" is
         "d:\path\filename.ext"

In this example a double percent sign is used to display a single percent sign, and the output from %s is that same as the output from %|dpfeF.

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