cpplib: Command line assertions made easier

[Zack Weinberg]

On Tue, Oct 31, 2000 at 08:42:47PM +0000, Neil Booth wrote:
> Zack suggested this back in April I think.  This allows specifying
> assertions on the command line, like
> 
>   -A predicate=answer
> 
> rather than
> 
>   -A predicate(answer)
> 
> (though the latter is still allowed).  The former does not fall afoul
> of shell special characters.

And there was much rejoicing.

Maybe you could point out the advantage of the new syntax in the cpp
documentation?

> How to get GCC to use this now?  Having to quote the output of -v is
> a royal pain it would be nice to relieve ourselves of permanently.

The -A switches come from the target config files.  We need to go
through them all, or at least the ones anyone cares about, and replace
the old syntax with the new.  It should be safe to do this with sed and
then read over the patch... in gcc/config:

for file in *.h */*.h; do 
  sed '/-A/s/-A\([a-zA-Z0-9_][a-zA-Z0-9_]*\)(\([^)][^)]*\))/-A\1=\2/g' \
	<$file >$file.new
  ../move-if-change $file.new $file
done

zw