iso_fortran_env

[Richard E Maine]

On Aug 29, 2006, at 2:35 PM, Brooks Moses wrote:

> Janne Blomqvist wrote:
>> Steve Kargl wrote:
>>> Everthing above matches gfortran with the possible exception of
>>> File_Storage_Size and Numeric_Storage_Size.  I don't F2003
>>> handy.  What do these values means?
>> IIRC file storage size is the number of bits per storage element.  
>> E.g. when you do a inquire(iolength) you get the answer as an  
>> integer multiple of the file storage size.
>
> No -- when you do an INQUIRE(IOLENGTH=), you get the answer in  
> units of the file storage unit.  If you want the answer in units of  
> bits, you have to multiply it by file_storage_size yourself.

I think the two of you just said the same thing in slightly different  
words. You probably misread what Janne wrote.

Back to the original question. I think that the values are probably  
right for most gfortran ports, but it might depend on the particular  
port. I know that g95 has some 64-bit ports where the numeric storage  
unit is 64 bits instead of 32. I forget whether gfortran has similar  
ports, but it seems plausible. I also forget whether there is a  
command-line switch like some compilers have for that.

-- 
Richard Maine                |  Good judgment comes from experience;
Richard.Maine@nasa.gov       |  experience comes from bad judgment.
                             |        -- Mark Twain