tree a54cce752647823418dfcd24c3994cb579d57354
parent 613f006b6455a1a3fefae1c582b8aa775786b751
author Eric Fiselier <eric@efcs.ca> 1561125373 +0000
committer Eric Fiselier <eric@efcs.ca> 1561125373 +0000

Assume __is_final,  __is_base_of, and friends.

All the compilers we support provide these builtins. We don't
need to do a configuration dance anymore.

This patch also cleans up some dead or almost dead
C++11 feature detection macros.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@364047 91177308-0d34-0410-b5e6-96231b3b80d8