Re: Compile warnings on OSX 10.10 clang 6.0

I wrote:
> Peter Eisentraut <peter_e@gmx.net> writes:
>> These warnings also happen with older versions of clang.  Now idea how
>> to fix yet.  I'm thinking that clang should be fixed, because these
>> warnings are stupid.

> Yeah, they're utterly stupid; whoever put them in obviously doesn't
> have a clue about typical Makefile construction.  I wonder if next
> we'll see complaints about unnecessary -D or -I switches.

> Having said that, I did look awhile ago about how we might get rid of
> them, and it seems not easy; for starters we would need to drop the
> assumption that CFLAGS can always be included when linking.  Also,
> AFAICT -pthread sometimes *is* required when linking; so it's
> not even very obvious when to suppress the switch, even if we could
> do so without wholesale rearrangement of our FLAGS handling.

On the other hand, there's often more than one way to skin a cat.
It occurred to me that maybe we could just turn off this class of warning,
and after some experimentation I found out that
"-Wno-unused-command-line-argument" does that, at least in the version
of clang that Apple's currently shipping.

Who's for enabling that if the compiler takes it?

                        regards, tom lane