LLVM 3.4 r193971 removed llvm::DisablePrettyStackTrace and made the pretty stack trace opt-in rather than opt-out. The default value of DisablePrettyStackTrace has changed to true in LLVM 3.4 and newer. Signed-off-by: Vinson Lee <vlee@freedesktop.org> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=60929 Reviewed-by: Tom Stellard <thomas.stellard@amd.com> Reviewed-by: Brian Paul <brianp@vmware.com>