[PATCH] support: Add TEST_COMPARE macro

[Florian Weimer]

On 11/27/2017 07:00 PM, Paul Eggert wrote:
> Come to think of it, perhaps it would be easier to add -Wsign-compare 
> only for TEST_COMPARE, and remove all the other gorp. What we're trying 
> to do here, is to have the effect of -Wsign-compare. Surely it's better 
> to do this check at compile-time with the compiler's help, rather than 
> try to dodge the compiler and do the check at run-time.

I'm not certain about that at all—the *types* could well differ in 
signedness between architectures (as it is common for char).  This is 
the main reason why I only want to test the values.

Florian