Adding PDP-11 support

[lars brinkhoff]

Hello,

I'm adding PDP-11 support to binutils.  Is there anything in
particular I should know about?

The assemblers on the PDP-11 use octal numbers by default.  Decimal
numbers are indicated by placing a '.' after them.  Should I modify
the GNU assembler to understand this syntax, or should I parse
numbers in the PDP-11 back end?  It seems that this would mean
that I couldn't use any of the expression parising code in GAS,
which would be unfortunate.