libstdc++ support for m68k

[Sebastian Huber]

It seems that the libstdc++ configure script already detects that for 
RTEMS the generic atomic built-ins are available and doesn't select the 
CPU-specific header file. So, this stuff in 
libstdc++-v3/config/cpu/m68k/atomicity.h looks like dead code.

On 09/09/16 21:54, Joel Sherrill wrote:
> I am OK with using what the default is as long as there is some 
> implementation
> for all the multilibs. That covers a lot of CPU models with no concept of
> atomic operations and some with just test and set.
>
> --joel
>
> On Fri, Sep 9, 2016 at 4:13 AM, Sebastian Huber 
> <sebastian.huber at embedded-brains.de 
> <mailto:sebastian.huber at embedded-brains.de>> wrote:
>
>     Hello,
>
>     I was a bit surprised to find this special case for RTEMS in
>     libstdc++ on m68k:
>
>     https://gcc.gnu.org/ml/libstdc++/2016-09/msg00017.html
>     <https://gcc.gnu.org/ml/libstdc++/2016-09/msg00017.html>
>
>     Any objections to eliminate this special case and simply use the
>     generic implementation? We have to check if the atomic operations
>     for our m68k (or ColdFire) targets really work and if the
>     libatomic is used appropriately.
>
>     -- 
>     Sebastian Huber, embedded brains GmbH
>
>     Address : Dornierstr. 4, D-82178 Puchheim, Germany
>     Phone   : +49 89 189 47 41-16 <tel:%2B49%2089%20189%2047%2041-16>
>     Fax     : +49 89 189 47 41-09 <tel:%2B49%2089%20189%2047%2041-09>
>     E-Mail  : sebastian.huber at embedded-brains.de
>     <mailto:sebastian.huber at embedded-brains.de>
>     PGP     : Public key available on request.
>
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>
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-- 
Sebastian Huber, embedded brains GmbH

Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone   : +49 89 189 47 41-16
Fax     : +49 89 189 47 41-09
E-Mail  : sebastian.huber at embedded-brains.de
PGP     : Public key available on request.

Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.