required for PGO linking - to be a configure time error rather than
make time when --with-optimizations is enabled.  Also improve our
ability to find the llvm-profdata tool on MacOS and some Linuxes.

Original patch by Martin Panter, new policy fixes by me.

modules.

Initial patch by Alex LordThorsen.

Issue #27960: Revert state to 675e20c38fdac6, backing out all changes by developed for Issue #12885.

Initial patch contributed by Jaysinh shukla.

It is unused. It also forces a 16-byte alignment, which creates problems because
Python's allocator only uses 8-byte alignment.

Apparently the test succeeds on XP.

This test should always raise RuntimeError.

The tests no longer attempt to figure out if a soundcard or particular
system sounds are available.  Instead, it just tries everything and
accepts RuntimeError as a flavor of success.

Patch from Armin Rigo.

Patch from Armin Rigo.