[PATCH] [RTEMS] Always use atomic builtins for libstdc++

[Sebastian Huber]

On 22/09/16 10:47, Jonathan Wakely wrote:
> On 22/09/16 09:41 +0200, Sebastian Huber wrote:
>> libstdc++-v3/
>>     * config/cpu/m68k/atomicity.h: Adjust comment.
>>     * acinclude.m4 (GLIBCXX_ENABLE_ATOMIC_BUILTINS): Honor
>>     explicit atomicity_dir setup via configure.host.
>>     * configure.host (rtems-*): Set atomicity_dir.
>>     * configure: Regenerate.
>> ---
>> libstdc++-v3/acinclude.m4                |  5 +++--
>> libstdc++-v3/config/cpu/m68k/atomicity.h |  3 +++
>> libstdc++-v3/configure                   | 11 ++++++-----
>> libstdc++-v3/configure.host              |  4 ++++
>> 4 files changed, 16 insertions(+), 7 deletions(-)
>>
>> diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
>> index 6d897be..3256ce4 100644
>> --- a/libstdc++-v3/acinclude.m4
>> +++ b/libstdc++-v3/acinclude.m4
>> @@ -3490,9 +3490,10 @@ EOF
>>   AC_LANG_RESTORE
>>
>>   # Set atomicity_dir to builtins if all but the long long test above 
>> passes.
>> -  if test "$glibcxx_cv_atomic_bool" = yes \
>> +  if ( test "$glibcxx_cv_atomic_bool" = yes \
>>      && test "$glibcxx_cv_atomic_short" = yes \
>> -     && test "$glibcxx_cv_atomic_int" = yes; then
>> +     && test "$glibcxx_cv_atomic_int" = yes ) \
>> +     || test "$atomicity_dir" = "cpu/generic/atomicity_builtins"; then
>
> Could you adjust the comment too please? Maybe something like:
>
>   # Set atomicity_dir to builtins if all but the long long test above 
> passes,
>   # or if the builtins were already chosen (e.g. by configure.host).
>
> OK with an adjusted comment, thanks.
>
>

Thanks for the quick review. I would like to back port this to GCC 6.

-- 
Sebastian Huber, embedded brains GmbH

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