tree e90a4b6b3c1b880285654a0a5fb9fde8cb58f23b
parent af16e881aa05db4683b4b072afff329948951cbe
author Louis Dionne <ldionne@apple.com> 1565213763 +0000
committer Louis Dionne <ldionne@apple.com> 1565213763 +0000

[libc++] Take 3: Do not cleverly link against libc++abi just because it happens to be there

Summary:
Otherwise, when libcxxabi is not an enabled project in the monorepo, we
get a link error because we try to link against non-existent cxxabi_shared.

More generally, we shouldn't change the behavior of the build based on
implicit things like whether a file happens to be at a specific path or
not.

This is a re-application of r365222 that had been reverted in r365233
and then r365359 because it broke the build bots. The build bots
should now specify explicitly what ABI library they want to use
(libc++abi), so this commit should now be OK to merge. It takes a while
for build bots to pick up configuration changes, which is why this failed
the last time around.

Differential Revision: https://reviews.llvm.org/D63883

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@368213 91177308-0d34-0410-b5e6-96231b3b80d8