Gfortran (mis)information in the Polyhedron site.

[Steve Kargl <sgk at troutmask dot apl dot washington dot edu>]

John,

First, thanks for including gfortran in Polyhedron Fortran
comparison charts.  I noticed that the Language Comparison
chart has some misinformation.  

(1) gfortran has OpenMP support in version 4.2.0, which requires
    the -fopenmp option and an operating system with pthreads. 

(2) Although I can't find Polyhedron's description of the
    the "VAX style debug (D) lines".  gfortran has two
    options -fd-lines-as-code and -fd-lines-as-comments that
    are probably applicable.

(3) "Get Command Line".  Gfortran has getarg/iargc as well as
    the F2003 command_argument_count, get_command, and
     get_command_argument

(4) "Get Environment Variable".  Gfortran has get_environment_variable.

(5) "Invoke External command".  Gfortran has the system() subroutine
    for invoking commands.

(6) "Get Files in Directory".  I'm not sure what intrinsic procedure
    this description is suppose to invoke.

(7) "Get File Size, Date, Attributes".  This appears to be operating
    system specific (which one?), because ....

(8) "Unix style system library (getenv, etime etc.)" gfortran implements
    a large collection of the Unix style intrinsic procedures that can 
    be used to "Get File Size, Date, Attributes".  Note, however, that for
    example if your program does

    PROGRAM A
    REAL T(2)
    EXTERNAL ETIME
    call ETIME(T) 
    END

    gfortran will not supply its version of etime because your program
    has promised gfortran that etime is an EXTERNALly supplied routine.
    Remove the EXTERNAL and gfortran will supply etime.

Yes, gfortran's documentation is fairly weak in describing all of
the above.  So, it is understandable why the chart has the inaccuracies.
Hopefully, you can correct the chart at your convenience.

-- 
Steve