tree 4725de40b15a9aebea44fb69dff37af8008b228b
parent b5d7ccadeb36861e4c87788f86e954dd08adcc94
author Eric Fiselier <eric@efcs.ca> 1603195880 -0400
committer Copybara-Service <copybara-worker@google.com> 1604019867 -0700

[libc++] Make __shared_weak_count vtable consistent across all build configurations

This patch ensures that __shared_weak_count provides a consistent vtable
regardless of if RTTI is enabled or if we are targeting a static or shared
libc++ build.

This patch is technically ABI breaking, but only for a very specific
configuration that no vendor should be shipping.

Note that _LIBCPP_BUILD_STATIC is not normally defined when building
libc++.a, but instead it must be manually provided by the user or the
__config_site.

Differential Revision: https://reviews.llvm.org/D32838

GitOrigin-RevId: 229db3647491ed2b2706a9b9ce13a97e38be6fa0