Option -mwarn_areg_zero for S/390.

[Nick Clifton]

Hi Martin,

> 2001-09-19  Martin Schwidefsky <schwidefsky@de.ibm.com>
> 
>      * gas/config/tc-s390.c: Add option -mwarn_areg_zero.

Approved and applied.


Note - I fixed the typo in the ChangeLog entry.  I also fixed a
formatting bug in the code you submitted - the GNU coding conventions
specify that multi-line if statements should have the conditional
operator '&&' or '||' at the start of each line, and not at the end of
the previous line.

I also added text to the string in md_show_usage() documenting the new
command line switch.

I would also like to echo Andreas's request that you consider writing
a c-s390.texi file to document the s390 specific parts of this port of
GAS.

Cheers
        Nick