fortran character strings in common blocks

[Wu Zhou]

On Tue, 2 Aug 2005, Jack Howarth wrote:
>    Is gdb supposed to be able to print the values of character strings
> that belong to COMMON blocks? I find that a character string declared as...
> 
>       PARAMETER    (COMMAX=132)
>       CHARACTER*(COMMAX) COMLYN
> 
>       COMMON /CCOMND/ COMLYN
> 
> that I get an error...
> 
> (gdb) print COMLYN
> No symbol "COMLYN" in current context.
> 
> even though I can assign this character string to
> a locally declared character string (not in a 
> COMMON block) and then print this string with gdb.
> Thanks in advance for any clarifications on this issue.
>            Jack
> ps This is with gfortran from the current gcc 4.0 branch.
> 

The reason is that gfortran treats common blocks as structure.  So gdb 
can't handle it at this time.  gdb expects it treated as 
DW_TAG_common_block.  I ever opened a bug on this at GCC bugzilla:
  http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057

Hope that gfortran community could handle this in a near future.

Regards
- Wu Zhou