[PATCH] Remove -Wabi from libstdc++ build options

[Jonathan Wakely]

On 30/06/18 20:48 +0000, Bernd Edlinger wrote:
>Hi,
>
>the -Wabi option prints a warning as follows:
>
>cc1plus: warning: -Wabi won't warn about anything [-Wabi]
>cc1plus: note: -Wabi warns about differences from the most up-to-date
>ABI, which is also used by default
>cc1plus: note: use e.g. -Wabi=11 to warn about changes from GCC 7
>
>This happens many times while building libstdc++, and as the warning
>explains, it is good for nothing, so this patch removes it.
>
>
>Bootstrapped and reg-tested on x86_64-pc-linux-gnu.
>Is it OK for trunk?

No, I don't think we want to simply remove it.

Maybe https://gcc.gnu.org/ml/gcc/2018-06/msg00276.html instead?