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fortran .HLP

FORT$INCLUDE

If defined during compilation, causes the default file specification used to locate include files and text libraries from '.FOR' and '.TLB' to 'FORT$INCLUDE:.FOR' and 'FORT$INCLUDE:.TLB', respectively. May be a search list.

FORT$LIBRARY

 If defined during compilation, specifies one or more default text libraries to be searched for library-based INCLUDE statements which do not specify a library file. These default libraries are searched after any libraries specified on the command line with /LIBRARY and before the system-supplied library FORSYSDEF.TLB. May have multiple translations; each translation is used as if it has appeared as an input file on the command line with the /LIBRARY qualifier with file specification defaulting occurring within the FORT$LIBRARY list only.

FOR$ACCEPT

 If defined during execution, 'FOR$ACCEPT' is used instead of 'SYS$INPUT' as the file specification for the implicit Fortran logical unit used for ACCEPT statements.

FOR$CONVERTnnn

 If defined during execution specifies a default data conversion type for unit "nnn". The translation of the logical name must be a valid keyword for the /CONVERT= qualifier. For example:

$ DEFINE FOR$CONVERT002 LITTLE_ENDIAN

makes LITTLE_ENDIAN the default convert type for unit 2. A defined logical name for a unit overrides the /CONVERT compile command or OPTIONS statement qualifier and an explicit CONVERT= keyword on an OPEN statement. See the description of the /CONVERT qualifier for more information.

FOR$PRINT

If defined during execution, 'FOR$PRINT' is used instead of 'SYS$OUTPUT' as the file specification for the implicit Fortran logical unit used for PRINT statements and WRITE statements that specify * as the unit number.

FOR$PROCESSES

 If defined during execution of a parallel processing application, controls the number of processes used. The default is the number of processors available on the executing system. The minimum is 1, the maximum is 32. See the DEC Fortran Performance Guide for more information.

FOR$READ

 If defined during execution, 'FOR$READ' is used instead of 'SYS$INPUT' as the file specification for the implicit Fortran logical unit used for READ statements that specify * or omit the unit number.

FOR$SPIN_WAIT

 If defined during execution of a parallel processing application, controls the synchronization method used. A value of 0 causes busy-waiting to be used, which maximizes synchronization response at the expense of wasted processor cycles. Positive values specify the number of busy-wait cycles to execute before relinquishing control of the processor. The default is 1000. See the DEC Fortran Performance Guide for more information.

FOR$STALL_WAIT

 If defined during execution of a parallel processing application, specifies the number of spin-wait cycles (see FOR$SPIN_WAIT) that a parallel worker subprocess should execute while waiting for more work to do before becoming inactive. A value of 0 prevents the process from becoming inactive. The default is 10 times the number of worker subprocesses. See the DEC Fortran Performance Guide for more information.

FOR$TYPE

 If defined during execution, 'FOR$TYPE' is used instead of 'SYS$OUTPUT' as the file specification for the implicit Fortran logical unit used for TYPE statements.

FORnnn

 The file specification 'FORnnn', where 'nnn' is the logical unit number, is used as the file specification when a logical unit is opened and the FILE= keyword was not specified in an OPEN statement. Similarly, 'FORnnn.DAT' is used as the default file specification unless the DEFAULTFILE= keyword was specified. FORnnn may be defined as a logical name, in which case it is used by OpenVMS RMS to specify the file to be opened.