bug in g77

[Toon Moene]

Mark D LEAIR wrote:
> Hi,
> 
> It appears that g77 always converts a real function return value to 
> double precision. The following program illustrates this:
> 
>       REAL FUNCTION FOO()
>       RFROMC = 50.0
>       RETURN
>       END

Indeed.  See the discussion around the option -fno-f2c to force g77 to 
give up f2c compatibility in this regard (because f2c - originally - 
compiled to K&R defined C, it had to treat functions returning float as 
functions returning double.  You can override this behaviour, though. 
Note that you have to compile *the whole program* and all its associate 
libraries with this option, if you choose to use it.

URL: 
http://gcc.gnu.org/onlinedocs/gcc-3.4.1/g77/Code-Gen-Options.html#Code%20Gen%20Options

Hope this helps,

-- 
Toon Moene - mailto:toon@moene.indiv.nluug.nl - phoneto: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
Maintainer, GNU Fortran 77: http://gcc.gnu.org/onlinedocs/g77_news.html
A maintainer of GNU Fortran 95: http://gcc.gnu.org/fortran/