diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3f0bfd6..806b825 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@
 # Setup Project
 #===============================================================================
 
-cmake_minimum_required(VERSION 2.8.8)
+cmake_minimum_required(VERSION 3.4.3)
 
 if (POLICY CMP0042)
   cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default
@@ -28,11 +28,11 @@
     if (NOT HAD_ERROR)
       string(REGEX REPLACE "[ \t]*[\r\n]+[ \t]*" ";"
              CONFIG_OUTPUT ${CONFIG_OUTPUT})
-    else ()
+    else()
       string(REPLACE ";" " " CONFIG_COMMAND_STR "${CONFIG_COMMAND}")
       message(STATUS "${CONFIG_COMMAND_STR}")
       message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}")
-    endif ()
+    endif()
 
     list(GET CONFIG_OUTPUT 0 INCLUDE_DIR)
     list(GET CONFIG_OUTPUT 1 LLVM_OBJ_ROOT)
@@ -43,32 +43,32 @@
     set(LLVM_MAIN_SRC_DIR ${MAIN_SRC_DIR} CACHE PATH "Path to LLVM source tree")
     set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX}/cmake/llvm")
     set(LLVM_LIT_PATH "${LLVM_PATH}/utils/lit/lit.py")
-  else ()
+  else()
     message(FATAL_ERROR "llvm-config not found and LLVM_MAIN_SRC_DIR not defined. "
                         "Reconfigure with -DLLVM_CONFIG=path/to/llvm-config "
                         "or -DLLVM_PATH=path/to/llvm-source-root.")
-  endif ()
+  endif()
 
   if (EXISTS ${LLVM_CMAKE_PATH})
     list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")
     include("${LLVM_CMAKE_PATH}/AddLLVM.cmake")
     include("${LLVM_CMAKE_PATH}/HandleLLVMOptions.cmake")
-  else ()
+  else()
     message(FATAL_ERROR "Not found: ${LLVM_CMAKE_PATH}")
-  endif ()
+  endif()
 
   set(PACKAGE_NAME libunwind)
-  set(PACKAGE_VERSION 3.8.0svn)
+  set(PACKAGE_VERSION 3.9.0)
   set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
   set(PACKAGE_BUGREPORT "llvm-bugs@lists.llvm.org")
 
   if (EXISTS ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
     set(LLVM_LIT ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
-  else ()
+  else()
     # Seek installed Lit.
     find_program(LLVM_LIT "lit.py" ${LLVM_MAIN_SRC_DIR}/utils/lit
                  DOC "Path to lit.py")
-  endif ()
+  endif()
 
   if (LLVM_LIT)
     # Define the default arguments to use with 'lit', and an option for the user
@@ -76,16 +76,16 @@
     set(LIT_ARGS_DEFAULT "-sv")
     if (MSVC OR XCODE)
       set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar")
-    endif ()
+    endif()
     set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options for lit")
 
     # On Win32 hosts, provide an option to specify the path to the GnuWin32 tools.
     if (WIN32 AND NOT CYGWIN)
       set(LLVM_LIT_TOOLS_DIR "" CACHE PATH "Path to GnuWin32 tools")
-    endif ()
-  else ()
+    endif()
+  else()
     set(LLVM_INCLUDE_TESTS OFF)
-  endif ()
+  endif()
 
   set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX})
   set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX})
@@ -111,7 +111,6 @@
 set(LIBUNWIND_GCC_TOOLCHAIN "" CACHE PATH "GCC toolchain for cross compiling.")
 set(LIBUNWIND_SYSROOT "" CACHE PATH "Sysroot for cross compiling.")
 
-
 # Check that we can build with 32 bits if requested.
 if (CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32)
   if (LIBUNWIND_BUILD_32_BITS AND NOT LLVM_BUILD_32_BITS) # Don't duplicate the output from LLVM
@@ -220,23 +219,23 @@
   # MSVC doesn't like _DEBUG on release builds. See PR 4379.
   if (NOT MSVC)
     list(APPEND LIBUNWIND_COMPILE_FLAGS -D_DEBUG)
-  endif ()
+  endif()
 
   # On Release builds cmake automatically defines NDEBUG, so we
   # explicitly undefine it:
   if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
     list(APPEND LIBUNWIND_COMPILE_FLAGS -UNDEBUG)
-  endif ()
+  endif()
 else()
   if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
     list(APPEND LIBUNWIND_COMPILE_FLAGS -DNDEBUG)
-  endif ()
-endif ()
+  endif()
+endif()
 
 # Cross-unwinding
 if (NOT LIBUNWIND_ENABLE_CROSS_UNWINDING)
   list(APPEND LIBUNWIND_COMPILE_FLAGS -D_LIBUNWIND_IS_NATIVE_ONLY)
-endif ()
+endif()
 
 # ARM WMMX register support
 if (LIBUNWIND_ENABLE_ARM_WMMX)
@@ -245,12 +244,12 @@
   # provide the option to explicitly enable support for WMMX registers in the
   # unwinder.
   list(APPEND LIBUNWIND_COMPILE_FLAGS -D__ARM_WMMX)
-endif ()
+endif()
 
 # This is the _ONLY_ place where add_definitions is called.
 if (MSVC)
   add_definitions(-D_CRT_SECURE_NO_WARNINGS)
-endif ()
+endif()
 
 #===============================================================================
 # Setup Source Code