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As I mentioned earlier in this thread, GCC supports 2 types of
atomics. "Use GCC atomic builtins" does not help distinguish
between them. In "GCC's C11 atomic builtins" - "C11" indicates
which atomics we are using, "atomic builtins" indicates that we
are NOT using APIs from stdatomic.h

if you need a term to distinguish the two sets of atomics in gcc you
can qualify it with "Memory Model Aware" which is straight from the gcc

manual.

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"Memory model aware" sounds too generic. The same page [1] also makes

it clear that the built-in functions match the requirements for the C11
memory model.

allow me to put your interpretation of the manual that you linked side by side
with what the manual text actually says verbatim.

your text from above
  "built-in functions match the requirements for the C11 memory model."

the actual text from your link
  "built-in functions approximately match the requirements for the C++11
memory model."

* you've chosen to drop approximately from the wording to try and make
  your argument.

I am not sure how this makes a difference to our arguments. For ex: there are no other built in functions that "exactly" match the C++11 memory model supported by GCC.

* you've also chosen to substitute C11 in place of C++11. again
  presumably for the same reason.

in fact the entire page does not mention C11 even once, it also goes on to
highlight a specific deviation from C++11 with this excerpt "because of a
deficiency in C++11's semantics for memory_order_consume"

I do not have a problem to call it C++11. IMO, calling it "GCC's C++11 ..." will address this deviation and the approximation.

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There are also several patches merged in the past which do not use the term

"memory model aware". I would prefer to be consistent.

i prefer the history represent the change. that previous submitters and
reviewers lacked precision is not my concern nor is consistency a reason to
continue documenting history incorrectly.

Ok. As I mentioned, it is just my preference.

i'm waiting to ack the change, it's up to you. you've already spent more time
arguing than it would have taken to submit a v2 correcting the problem.

I am not arguing for the sake of arguing. You are trying to correct few mistakes here (I truly appreciate that) and I am trying to explain my POV and making corrections as needed. I am sure we will conclude soon.

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[1] https://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html