Use the existing build configuration parameter ENABLE_BACKTRACE to compile out all pretty stack trace support when backtraces are disabled.

This has the nice secondary effect of allowing LLVM to continue to build
for targets without __thread or thread_local support to continue to work
so long as they build without support for backtraces.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227423 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed