4 files changed, 17 insertions, 3 deletions
diff --git a/Modules/CheckIPOSupported.cmake b/Modules/CheckIPOSupported.cmake
index 55c8901..31c1bd3 100644
--- a/Modules/CheckIPOSupported.cmake
+++ b/Modules/CheckIPOSupported.cmake
@@ -28,6 +28,9 @@ property.
     Specify languages whose compilers to check.
     Languages ``C`` and ``CXX`` are supported.
 
+It makes no sense to use this module when :policy:`CMP0069` is set to ``OLD`` so
+module will return error in this case. See policy :policy:`CMP0069` for details.
+
 Examples
 ^^^^^^^^
 
@@ -125,7 +128,17 @@ macro(_ipo_run_language_check language)
 endmacro()
 
 function(check_ipo_supported)
-  # TODO: IPO policy
+  cmake_policy(GET CMP0069 x)
+
+  string(COMPARE EQUAL "${x}" "" not_set)
+  if(not_set)
+    message(FATAL_ERROR "Policy CMP0069 is not set")
+  endif()
+
+  string(COMPARE EQUAL "${x}" "OLD" is_old)
+  if(is_old)
+    message(FATAL_ERROR "Policy CMP0069 set to OLD")
+  endif()
 
   set(optional)
   set(one RESULT OUTPUT)
diff --git a/Modules/CheckIPOSupported/CMakeLists-C.txt.in b/Modules/CheckIPOSupported/CMakeLists-C.txt.in
index d20f31f..5a3b8ee 100644
--- a/Modules/CheckIPOSupported/CMakeLists-C.txt.in
+++ b/Modules/CheckIPOSupported/CMakeLists-C.txt.in
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION "@CMAKE_VERSION@")
 project("@TRY_COMPILE_PROJECT_NAME@" LANGUAGES C)
 
-# TODO: IPO policy
+cmake_policy(SET CMP0069 NEW)
 
 add_library(foo foo.c)
 add_executable(boo main.c)
diff --git a/Modules/CheckIPOSupported/CMakeLists-CXX.txt.in b/Modules/CheckIPOSupported/CMakeLists-CXX.txt.in
index 4b55c70..30993fa 100644
--- a/Modules/CheckIPOSupported/CMakeLists-CXX.txt.in
+++ b/Modules/CheckIPOSupported/CMakeLists-CXX.txt.in
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION "@CMAKE_VERSION@")
 project("@TRY_COMPILE_PROJECT_NAME@" LANGUAGES CXX)
 
-# TODO: IPO policy
+cmake_policy(SET CMP0069 NEW)
 
 add_library(foo foo.cpp)
 add_executable(boo main.cpp)
diff --git a/Modules/Platform/Linux-Intel.cmake b/Modules/Platform/Linux-Intel.cmake
index 45dc36f..6e2978a 100644
--- a/Modules/Platform/Linux-Intel.cmake
+++ b/Modules/Platform/Linux-Intel.cmake
@@ -39,6 +39,7 @@ macro(__linux_compiler_intel lang)
       "${XIAR} cr <TARGET> <LINK_FLAGS> <OBJECTS> "
       "${XIAR} -s <TARGET> ")
     set(_CMAKE_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
+    set(_CMAKE_IPO_LEGACY_BEHAVIOR YES)
   else()
     set(_CMAKE_IPO_MAY_BE_SUPPORTED_BY_COMPILER NO)
   endif()