ASM allowed in Fortran? and OpenDir?

[RadSurfer]

Tobias Burnus <burnus <at> net-b.de> writes:

> 
> RadSurfer wrote:
[snip]> >   

> This slowly becomes a frequently ask question:
> http://gcc.gnu.org/ml/fortran/2007-07/msg00470.html
> 
[snip] 
> In principle the following program should do this; however, I only get
> NULL returned by opendir (with gfortran), a compiler error (g95) or an
> endless loop (NAG f95). Besides compiler errors, I think I made a
> mistake somewhere too.
> 
> Tobias
> 
> module mod
>   use iso_c_binding
>   implicit none
>   integer(c_int), bind(c,name="errno") :: errno
> end module mod
[snip]

I tried my very best to copy and paste this great example of calling a C
( glibc? is that right? ) routine from Fortran, but I get this error:

[RadSurfer@centos ~]$ cd fortran
[RadSurfer@centos fortran]$ gfortran od.f95
 In file od.f95:2

  use iso_c_binding
                  1
Fatal Error: Can't open module file 'iso_c_binding.mod' for reading at (1): No
such file or directory
[RadSurfer@centos fortran]$ 

PLEASE...  Can you kindly provide me with a working example of this!
I wish to print it out and study it.  Most grateful.

//Rich//

PS:Thanks everyone.