VMS Logical File Names in the INCLUDE Statement

f77 interprets VMS logical file names on the INCLUDE statement if:

• The -xl[d] or -vax=spec compiler options are set.

• The environment variable LOGICALNAMEMAPPING is there to define the mapping between the logical names and the UNIX path name.

  f77 uses the following rules for the interpretation:

  • The environment variable should be set to a string with the syntax:

    "lname1=path1; lname2=path2; "

    where each lname is a logical name and each path1, path2, and so forth is the path name of a directory (without a trailing /).

  • All blanks are ignored when parsing this string. It strips any trailing /[no]list from the file name in the INCLUDE statement.

  • Logical names in a file name are delimited by the first : in the VMS file name, so f77 converts file names of the lname1:file form to the path1/file form.

  • For logical names, uppercase and lowercase are significant. If a logical name is encountered on the INCLUDE statement which is not specified in the LOGICALNAMEMAPPING, the file name is used, unchanged.