[C++] warn_synth considered obsolete

[Gabriel Dos Reis]

Jason Merrill <jason@redhat.com> writes:

| On 02 Jan 2005 14:37:02 +0100, gcc@integrable-solutions.net wrote:
| 
| > While looking into PR C++/18644, it occurs to me that the option
| > -Wsynth is no longer useful. 
| 
| Your proposal for fixing 18644 is to make -Wsynth useless.  I don't have
| much of a problem with that, but I suspect that the user is probably using
| it for a reason...

Currently, diagnostics based on -Wsynth are not useful in any obvious
way I can see.

(I can see uses for -Wsynth, but for different semantics.)

-- Gaby