+# Find the libunwind library
+#
+# LIBUNWIND_FOUND - True if libunwind was found.
+# LIBUNWIND_LIBRARIES - The libraries needed to use libunwind
+# LIBUNWIND_INCLUDE_DIR - Location of unwind.h and libunwind.h
+
+# This file was downloaded from https://github.com/cmccabe/lksmith/blob/master/cmake_modules/FindLibunwind.cmake
+# Copyright (c) 2011-2012, the Locksmith authors.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#
+# Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Modified by the SimGrid team for:
+# - Survive the fact that libunwind cannot be found (setting LIBUNWIND_FOUND correctly)
+# - Also search for the unwind-ptrace component (but survive when it's not here)
+
+set(LIBUNWIND_FOUND "1")