Fix build failure with cmake version bump
llvm-svn: 271582
diff --git a/compiler-rt/CMakeLists.txt b/compiler-rt/CMakeLists.txt
index e093b74..65ba7ee 100644
--- a/compiler-rt/CMakeLists.txt
+++ b/compiler-rt/CMakeLists.txt
@@ -16,6 +16,16 @@
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)
# FIXME: It may be removed when we use 2.8.12.
if(CMAKE_VERSION VERSION_LESS 2.8.12)