-qlanglvl

Purpose

Determines which language standard (or superset, or subset of a standard) to consult for nonconformance. It identifies nonconforming source code and also options that allow such nonconformances.

Syntax


                    .-:------------.   
                    V .-extended-. |   
>>- -q--langlvl--=----+-77std----+-+---------------------------><
                      +-90std----+     
                      +-90pure---+     
                      +-95std----+     
                      +-95pure---+     
                      +-2003std--+     
                      +-2003pure-+     
                      +-2008std--+     
                      +-2008pure-+     
                      +-ts-------+     
                      '-tspure---'

@PROCESS:

@PROCESS LANGLVL({suboption})

Defaults

-qlanglvl=extended

Parameters

77std: Accepts the language that the ANSI FORTRAN 77 standard specifies and reports anything else using language-level messages.
90std: Accepts the language that the ISO Fortran 90 standard specifies and reports anything else using language-level messages.
90pure: The same as 90std except that it also issues language-level messages for any obsolescent Fortran 90 features used.
90ext: Obsolete suboption that is equivalent to extended.
95std: Accepts the language that the ISO Fortran 95 standard specifies and reports anything else using language-level messages.
95pure: The same as 95std except that it also issues language-level messages for any obsolescent Fortran 95 features used.
2003std: Accepts the language that the ISO Fortran 2003 standard specifies and reports anything else using language-level messages.
2003pure: The same as 2003std except that it also issues language-level messages for any obsolescent Fortran 2003 features used.
2008std: Accepts the language that the ISO Fortran 2003 standard specifies and all Fortran 2008 features supported by XL Fortran, and reports anything else using language-level messages.
2008pure: The same as 2008std except that it also issues language-level messages for any obsolescent Fortran 2008 features used.
ts: Accepts the language that a standard technical specification specifies supplements the latest language standard. Reports anything else using language-level messages. A Technical Specification is an addition to the current Fortran standard. This option checks for the language that the ISO Fortran 2003 standard specifies, all supported ISO Fortran 2008 standard features, and all supported ISO TS 29113 features.
tspure: The same as ts except that it also issues language-level messages for any obsolescent Technical Specification features used.
extended: Accepts the full Fortran 2003 language standard, all Fortran 2008 features supported by XL Fortran, and all extensions, effectively turning off language-level checking.

Usage

When a -qlanglvl setting is specified, the compiler issues a message with severity code L if it detects syntax that is not allowed by the language level that you specified.

The -qflag option can override the -qlanglvl option.

The langlvl runtime option, which is described in Setting runtime options, helps to locate runtime extensions that cannot be checked for at compile time.

Examples

The following example contains source code that conforms to a mixture of Fortran standards:

!----------------------------------------------------------
! in free source form
program tt
    integer :: a(100,100), b(100), i
    real :: x, y
    ...
    goto (10, 20, 30), i
10 continue
    pause 'waiting for input'

20 continue
    y= gamma(x)

30 continue
    b = maxloc(a, dim=1, mask=a .lt 0)

end program
!----------------------------------------------------------

The following table shows examples of how some -qlanglvl suboptions affect this sample program:

-qlanglvl Suboption Specified	Result	Reason
95pure	Flags PAUSE statement Flags computed GOTO statement Flags GAMMA intrinsic	Deleted feature in Fortran 95 Obsolescent feature in Fortran 95 Extension to Fortran 95
95std	Flags PAUSE statement Flags GAMMA intrinsic	Deleted feature in Fortran 95 Extension to Fortran 95
extended	No errors flagged

Related information

-qflag
-qhalt
-qsaa
langlvl runtime option in Setting runtime options