CMakeLists.txt
runtime/libupc/CMakeLists.txt
include/clang/Config/config.h.cmake
include/clang/Config/config.h.in
	Add configure for UPC backtracing.  On some systems (e.g. freebsd)
	and extra library (execinfo) must be placed on the UPC link line
	for backtrace and backtrace_symbl functions.
lib/Driver/Tools.cpp
	Add exexinfo library on FreeBSD/OpenBSD/NetBSD systems if UPC
	backtracing is enabled.