Policy proposal - CPP_PREDEFINES

[Tim Hollebeek]

On Thu, Jun 04, 2037 at 05:03:35AM -0400, Richard Kenner wrote:
>     I'd like this to become official GCC policy: Beginning now, no new
>     port may include any symbol in CPP_PREDEFINES which is outside the C89
>     reserved name space.
> 
> I'd modify this to say "unless such symbols are defined by the vendor
> compiler on those systems" since we need such conmpatibility.

It would be nice if this were enforced instead of being policy.  For example:

1) put those defines in CPP_VENDOR_PREDEFINES, so they can disappear
automatically with -ansi.

2) Add code to check that CPP_PREDEFINES does not include illegal
symbols.