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

[Jonathan Wakely]

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.