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From: Jonathan Wakely <jwakely.gcc@gmail.com>
Date: Fri, 17 Apr 2020 09:12:16 +0100
Message-ID: <CAH6eHdRJ25z7kM15epLmTbiC6hwkBjC4s+J-Tb+sE-Z==tUzLQ@mail.gmail.com>
Subject: Re: [PATCH] Allow new/delete operator deletion only for replaceable.
To: Jakub Jelinek <jakub@redhat.com>
Cc: =?UTF-8?Q?Martin_Li=C5=A1ka?= <mliska@suse.cz>, 
 Marc Glisse <marc.glisse@inria.fr>, GCC Patches <gcc-patches@gcc.gnu.org>, 
 Jan Hubicka <hubicka@ucw.cz>, Nathan Sidwell <nathan@acm.org>
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On Fri, 17 Apr 2020 at 08:05, Jakub Jelinek wrote:
> One needs to use check-c++-all or GXX_TESTSUITE_STDS=98,11,14,17,2a make check
> or similar to get that though, because 11 isn't tested by default, only 98,
> 14 and 17 are ATM I think.

Right.

> Fixed thusly, committed to trunk as obvious.

Alternatively, leave it so it can be tested with C++11 but only
declare the sized delete when the compiler supports it:

#if __cpp_sized_deallocation
void operator delete[](void* ptr, __SIZE_TYPE__ sz) noexcept {
  --count;
  ::operator delete(ptr, sz);
}
#endif