NAGWare Fortran Tools - f95 Tools - nag_xref95

Index

NAME
DESCRIPTION
OPTIONS
RESTRICTIONS
SEE ALSO

NAME

nag_xref95 - Cross referencer

DESCRIPTION

nag_xref95 is the NAGWare f95 Cross reference tool which enables users to determine where each identifier in their program is used and in what context. It also provides an index facility which can be used to discover the definition or first-use of an identifier at a particular point in the program source.

If a filename with no extension is provided the tool will look for a file with the extension `.f95', and if that does not exist, for a file with the extension `.f90'.

If a file has the extension `.f90' or `.f95', it will be assumed to contain free format Fortran code. If a file has the extension `.f', `.for', `.f77', or `.ftn', the file is assumed to contain fixed format Fortran code. The options -fixed and -free may be used to override this behaviour.

Modules (and include files) are expected to exist in the current working directory or in a directory named by the -I option, see nag_modules95.

OPTIONS

Tool Options

"Output form" (-fmt=format): This option allows different output formats to be selected. Possible values of format are text and html for text and HTML output. The default is format=text.
"Index" (-index): By itself this option will generate an index instead of a cross-reference. If both the -index and -xref options are given then the index will be displayed after the cross-reference.
"Provide key for symbols" (-key): Generate a key describing the meaning of the cross-reference symbols. This option is ignored unless -xref is also specified.
"Wide" (-wide): Increases the number of references which may appear in a row of the cross-reference tables. This option may be used more than once. If given once then the table width is doubled, if given twice then the width is tripled and so on. Useful in conjunction with -fmt=html.
"Cross reference" (-xref): Generate a cross-reference (this is the default).

General Options

"Source format" (-fixed, -free)

Forces the tool to assume fixed or free format for the input file. If "Automatic" is set, .f90 files will be assumed to contain free format code , .f, .for, .f77, or .ftn are assumed to contain fixed format code.

"Include and module directories" (-I)

Add pathname to the list of directories which are to be searched for include files. The current working directory is always searched first, then any directories named in -I options.

"Fixed format source line length" (-132)

Increase the length of each fixed source form input line from 72 characters to 132 characters. This has no effect on free source form input.

"Allow double complex specific intrinsics" (-dcfuns)

Enable recognition of non-standard double precision complex intrinsic functions. These act as specific versions of the standard generic intrinsics as follows:

    Non-standard      Equivalent Fortran 95 Intrinsic
     CDABS(A)            ABS(A)
     DCMPLX(X,Y)         CMPLX(X,Y,KIND=KIND(0d0))
     DCONJG(Z)           CONJG(Z)
     DIMAG(Z)            AIMAG(Z)
     DREAL(Z)            REAL(Z) or DBLE(Z)

"Downgrade legacy code errors to warning" (-dusty)

Allows the analysis of ``legacy'' software by downgrading the category of common errors found in such software from ``Error'' to ``Warning'' (which may then be suppressed entirely with the -w option).

"Suppress information messages" (-info)

Suppress output of tool analysis stages information messages.

"Kind numbers"

"Byte kinds" (-kind=byte): Alter the kind numbering system used so that the kind numbers for INTEGER, REAL and LOGICAL match the number of bytes of storage (e.g. default REAL is 4 and DOUBLE PRECISION is 8). Note that COMPLEX kind numbers are the same as its REAL components, and thus half of the total byte length in the entity.
"Sequential kinds" (-kind=sequential): This confirms the default kind numbering system where all datatypes are numbered sequentially from 1 and increase with precision.

This option does not affect the interpretation of byte-length specifiers (an extension to Fortran 77).

"Downgrade argument checks between routines in different files" (-mismatch)

Downgrade consistency checking of procedure argument lists so that mismatches produce warning messages instead of error messages. This only affects calls to a routine which is not in the current file; calls to a routine in the file being compiled must still be correct.

"Downgrade argument checks between routines in the same file" (-mismatch_all)

Further downgrade consistency checking of procedure argument lists so that calls to routines in the same file which are incorrect will produce warnings instead of error messages.

"Continuation line limit" (-maxcontin)

Increase the limit on the number of continuation lines to N. The default, as specified by the Fortran standard, is 19 for fixed source form and 39 for free source form. This will not decrease the limit below the standard number.

"Output strict Fortran 95 obsolescent messages" (-strict95)

Produce obsolescence warning messages for use of ``CHARACTER*'' syntax. This message is not produced by default since most programs contain this syntax.

"Suppress warning messages" (-w=all)

Switch on or off tool analysis stages warning messages.

"Suppress obsolescent feature warning messages" (-w=obs)

Switch on or off warning messages about the use of obsolescent features.

"Suppress unused entity warning messages" (-w=unused)

Suppresses warning messages about unused entities. It is equivalent to -w=uda -w=uei -w=ulv -w=usy.

"Suppress unused dummy argument warning messages" (-w=uda)

Switch on or off warning messages about unused dummy arguments.

"Suppress unused explicit import warning messages" (-w=uei)

Switch on or off warning messages about unused explicit imports.

"Suppress unused local variable warning messages" (-w=ulv)

Switch on or off warning messages about unused local variables.

"Suppress unused symbol warning messages" (-w=usy)

Switch on or off warning messages about unused symbols.

"Suppress Fortran 77 extension warning messages" (-w=x77)

Switch on or off extension warnings for common extensions to FORTRAN 77. These are TAB format, byte-length specifiers and Hollerith constants.

"Suppress Fortran 95 extension warning messages" (-w=x95)

Switch on or off extension warnings for extensions to Fortran 95.

RESTRICTIONS