Обсуждение: pgsql: Revert "For all ppc compilers,implement pg_atomic_fetch_add_ wi

Revert "For all ppc compilers, implement pg_atomic_fetch_add_ with inline asm."

This reverts commit e7ff59686eacf5021fb84be921116986c3828d8a.  It
defined pg_atomic_fetch_add_u32_impl() without defining
pg_atomic_compare_exchange_u32_impl(), which is incompatible with
src/include/port/atomics/fallback.h.  Per buildfarm member prairiedog.

Discussion: https://postgr.es/m/7517.1568470247@sss.pgh.pa.us

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/87e9fae0696d9e3ff70a1438775ad9f786b854a5

Modified Files
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configure                              | 40 --------------
configure.in                           | 20 -------
src/include/pg_config.h.in             |  3 --
src/include/port/atomics/arch-ppc.h    | 98 ----------------------------------
src/include/port/atomics/generic-xlc.h | 66 +++++++++++++++++++++++
5 files changed, 66 insertions(+), 161 deletions(-)