Index: compiler-rt/trunk/CMakeLists.txt
===================================================================
--- compiler-rt/trunk/CMakeLists.txt
+++ compiler-rt/trunk/CMakeLists.txt
@@ -14,16 +14,6 @@
 endif()
 
 cmake_minimum_required(VERSION 3.4.3)
-# FIXME:
-# The OLD behavior (pre 3.2) for this policy is to not set the value of the 
-# CMAKE_EXE_LINKER_FLAGS variable in the generated test project. The NEW behavior
-# for this policy is to set the value of the CMAKE_EXE_LINKER_FLAGS variable 
-# in the test project to the same as it is in the calling project. The new 
-# behavior cause the compiler_rt test to fail during try_compile: see
-# projects/compiler-rt/cmake/Modules/CompilerRTUtils.cmake:121 such that
-# CAN_TARGET_${arch} is not set properly. This results in COMPILER_RT_SUPPORTED_ARCH
-# not being updated properly leading to poblems.
-cmake_policy(SET CMP0056 OLD)
 
 # Add path for custom compiler-rt modules.
 list(INSERT CMAKE_MODULE_PATH 0
Index: compiler-rt/trunk/cmake/Modules/CompilerRTDarwinUtils.cmake
===================================================================
--- compiler-rt/trunk/cmake/Modules/CompilerRTDarwinUtils.cmake
+++ compiler-rt/trunk/cmake/Modules/CompilerRTDarwinUtils.cmake
@@ -85,10 +85,12 @@
     if(TEST_COMPILE_ONLY)
       try_compile_only(CAN_TARGET_${os}_${arch} -v -arch ${arch} ${DARWIN_${os}_CFLAGS})
     else()
+      set(SAVED_CMAKE_EXE_LINKER_FLAGS ${CMAKE_EXE_LINKER_FLAGS})
+      set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${arch_linker_flags}")
       try_compile(CAN_TARGET_${os}_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_C}
                   COMPILE_DEFINITIONS "-v -arch ${arch}" ${DARWIN_${os}_CFLAGS}
-                  CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS=${arch_linker_flags}"
                   OUTPUT_VARIABLE TEST_OUTPUT)
+      set(CMAKE_EXE_LINKER_FLAGS ${SAVED_CMAKE_EXE_LINKER_FLAGS})
     endif()
     if(${CAN_TARGET_${os}_${arch}})
       list(APPEND working_archs ${arch})
Index: compiler-rt/trunk/cmake/Modules/CompilerRTUtils.cmake
===================================================================
--- compiler-rt/trunk/cmake/Modules/CompilerRTUtils.cmake
+++ compiler-rt/trunk/cmake/Modules/CompilerRTUtils.cmake
@@ -138,15 +138,16 @@
     elseif(TEST_COMPILE_ONLY)
       try_compile_only(CAN_TARGET_${arch} ${TARGET_${arch}_CFLAGS})
     else()
-      set(argstring "${CMAKE_EXE_LINKER_FLAGS} ${argstring}")
       set(FLAG_NO_EXCEPTIONS "")
       if(COMPILER_RT_HAS_FNO_EXCEPTIONS_FLAG)
         set(FLAG_NO_EXCEPTIONS " -fno-exceptions ")
       endif()
+      set(SAVED_CMAKE_EXE_LINKER_FLAGS ${CMAKE_EXE_LINKER_FLAGS})
+      set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${argstring}")
       try_compile(CAN_TARGET_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE}
                   COMPILE_DEFINITIONS "${TARGET_${arch}_CFLAGS} ${FLAG_NO_EXCEPTIONS}"
-                  OUTPUT_VARIABLE TARGET_${arch}_OUTPUT
-                  CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${argstring}")
+                  OUTPUT_VARIABLE TARGET_${arch}_OUTPUT)
+      set(CMAKE_EXE_LINKER_FLAGS ${SAVED_CMAKE_EXE_LINKER_FLAGS})
     endif()
   endif()
   if(${CAN_TARGET_${arch}})