[m-rev.] for review: drop support for versions of macOS prior to 10.9

[Julien Fischer]

On Mon, 26 Oct 2020, Peter Wang wrote:

> On Sun, 25 Oct 2020 22:52:09 +1100 Julien Fischer <jfischer at opturion.com> wrote:
>> diff --git a/NEWS b/NEWS
>> index a547f76..617226e 100644
>> --- a/NEWS
>> +++ b/NEWS
>> @@ -11,6 +11,11 @@ Changes that may break compatibility
>>
>>   * We have removed the legacy support for the Alpha architecture.
>>
>> +* We have dropped support for all versions of macOS prior to 10.9.
>> +
>> +  A consequence of this is that the `powerpc*apple*darwin*` configuration
>> +  is no longer supported.
>> +
>
> I think only one paragraph is required.
>
> Maybe an inclusive version range would be less likely to be
> misunderstood:
>
>    We have dropped support for macOS 10.8 and earlier.

Done.

>> diff --git a/compiler/compile_target_code.m b/compiler/compile_target_code.m
>> index 793516f..8f94c30 100644
>> --- a/compiler/compile_target_code.m
>> +++ b/compiler/compile_target_code.m
>> @@ -433,22 +433,6 @@ gather_c_compiler_flags(Globals, PIC, AllCFlags) :-
>>           WarningOpt = ""
>>       ),
>>
>> -    % The -floop-optimize option is incompatible with the global
>> -    % register code we generate on Darwin PowerPC.
>> -    % See the hard_coded/ppc_bug test case for an example
>> -    % program which fails with this optimization.
>
> Maybe delete the ppc_bug test case.

We aren't dropping support for ppc overall, so I would prefer to keep
the test around to ensure that it doesn't show elsewhere.

Julien.