Add policy CMP0069 to enforce INTERPROCEDURAL_OPTIMIZATION

Previously the `INTERPROCEDURAL_OPTIMIZATION` target property was
honored only for the Intel compiler on Linux and otherwise ignored.  In
order to add support for more compilers incrementally without changing
behavior in the future, add a new policy whose NEW behavior enforces the
`INTERPROCEDURAL_OPTIMIZATION` property.  Add flags for supported
compilers and otherwise produce an error.

22 files changed, 87 insertions, 0 deletions

diff --git a/Tests/RunCMake/CMP0069/CMP0069-NEW-cmake-result.txt b/Tests/RunCMake/CMP0069/CMP0069-NEW-cmake-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/CMP0069/CMP0069-NEW-cmake-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/CMP0069/CMP0069-NEW-cmake-stderr.txt b/Tests/RunCMake/CMP0069/CMP0069-NEW-cmake-stderr.txt
new file mode 100644
index 0000000..ddb3cae
--- /dev/null
+++ b/Tests/RunCMake/CMP0069/CMP0069-NEW-cmake-stderr.txt
@@ -0,0 +1,4 @@
+^CMake Error at CMP0069-NEW-cmake\.cmake:[0-9]+ \(add_executable\):
+  CMake doesn't support IPO for current compiler
+Call Stack \(most recent call first\):
+  CMakeLists\.txt:[0-9]+ \(include\)$
diff --git a/Tests/RunCMake/CMP0069/CMP0069-NEW-cmake.cmake b/Tests/RunCMake/CMP0069/CMP0069-NEW-cmake.cmake
new file mode 100644
index 0000000..23fae13
--- /dev/null
+++ b/Tests/RunCMake/CMP0069/CMP0069-NEW-cmake.cmake
@@ -0,0 +1,6 @@
+cmake_policy(SET CMP0069 NEW)
+
+set(_CMAKE_IPO_SUPPORTED_BY_CMAKE NO)
+
+add_executable(foo main.cpp)
+set_target_properties(foo PROPERTIES INTERPROCEDURAL_OPTIMIZATION TRUE)
diff --git a/Tests/RunCMake/CMP0069/CMP0069-NEW-compiler-result.txt b/Tests/RunCMake/CMP0069/CMP0069-NEW-compiler-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/CMP0069/CMP0069-NEW-compiler-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/CMP0069/CMP0069-NEW-compiler-stderr.txt b/Tests/RunCMake/CMP0069/CMP0069-NEW-compiler-stderr.txt
new file mode 100644
index 0000000..8decfab
--- /dev/null
+++ b/Tests/RunCMake/CMP0069/CMP0069-NEW-compiler-stderr.txt
@@ -0,0 +1,4 @@
+^CMake Error at CMP0069-NEW-compiler\.cmake:[0-9]+ \(add_executable\):
+  Compiler doesn't support IPO
+Call Stack \(most recent call first\):
+  CMakeLists\.txt:[0-9]+ \(include\)$
diff --git a/Tests/RunCMake/CMP0069/CMP0069-NEW-compiler.cmake b/Tests/RunCMake/CMP0069/CMP0069-NEW-compiler.cmake
new file mode 100644
index 0000000..24b409a
--- /dev/null
+++ b/Tests/RunCMake/CMP0069/CMP0069-NEW-compiler.cmake
@@ -0,0 +1,7 @@
+cmake_policy(SET CMP0069 NEW)
+
+set(_CMAKE_IPO_SUPPORTED_BY_CMAKE YES)
+set(_CMAKE_IPO_MAY_BE_SUPPORTED_BY_COMPILER NO)
+
+add_executable(foo main.cpp)
+set_target_properties(foo PROPERTIES INTERPROCEDURAL_OPTIMIZATION TRUE)
diff --git a/Tests/RunCMake/CMP0069/CMP0069-NEW-generator-result.txt b/Tests/RunCMake/CMP0069/CMP0069-NEW-generator-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/CMP0069/CMP0069-NEW-generator-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/CMP0069/CMP0069-NEW-generator-stderr.txt b/Tests/RunCMake/CMP0069/CMP0069-NEW-generator-stderr.txt
new file mode 100644
index 0000000..0e05ee7
--- /dev/null
+++ b/Tests/RunCMake/CMP0069/CMP0069-NEW-generator-stderr.txt
@@ -0,0 +1,4 @@
+^CMake Error at CMP0069-NEW-generator\.cmake:[0-9]+ \(add_executable\):
+  CMake doesn't support IPO for current generator
+Call Stack \(most recent call first\):
+  CMakeLists\.txt:[0-9]+ \(include\)$
diff --git a/Tests/RunCMake/CMP0069/CMP0069-NEW-generator.cmake b/Tests/RunCMake/CMP0069/CMP0069-NEW-generator.cmake
new file mode 100644
index 0000000..df2a888
--- /dev/null
+++ b/Tests/RunCMake/CMP0069/CMP0069-NEW-generator.cmake
@@ -0,0 +1,7 @@
+cmake_policy(SET CMP0069 NEW)
+
+set(_CMAKE_IPO_SUPPORTED_BY_CMAKE YES)
+set(_CMAKE_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
+
+add_executable(foo main.cpp)
+set_target_properties(foo PROPERTIES INTERPROCEDURAL_OPTIMIZATION TRUE)
diff --git a/Tests/RunCMake/CMP0069/CMP0069-OLD.cmake b/Tests/RunCMake/CMP0069/CMP0069-OLD.cmake
new file mode 100644
index 0000000..cfe1e9d
--- /dev/null
+++ b/Tests/RunCMake/CMP0069/CMP0069-OLD.cmake
@@ -0,0 +1,4 @@
+cmake_policy(SET CMP0069 OLD)
+
+add_executable(foo main.cpp)
+set_target_properties(foo PROPERTIES INTERPROCEDURAL_OPTIMIZATION TRUE)
diff --git a/Tests/RunCMake/CMP0069/CMP0069-WARN-stderr.txt b/Tests/RunCMake/CMP0069/CMP0069-WARN-stderr.txt
new file mode 100644
index 0000000..314e180
--- /dev/null
+++ b/Tests/RunCMake/CMP0069/CMP0069-WARN-stderr.txt
@@ -0,0 +1,9 @@
+^CMake Warning \(dev\) at CMP0069-WARN\.cmake:[0-9]+ \(add_executable\):
+  Policy CMP0069 is not set: INTERPROCEDURAL_OPTIMIZATION is enforced when
+  enabled.  Run "cmake --help-policy CMP0069" for policy details\.  Use the
+  cmake_policy command to set the policy and suppress this warning\.
+
+  INTERPROCEDURAL_OPTIMIZATION property will be ignored for target 'foo'\.
+Call Stack \(most recent call first\):
+  CMakeLists\.txt:[0-9]+ \(include\)
+This warning is for project developers\.  Use -Wno-dev to suppress it\.$
diff --git a/Tests/RunCMake/CMP0069/CMP0069-WARN.cmake b/Tests/RunCMake/CMP0069/CMP0069-WARN.cmake
new file mode 100644
index 0000000..0e3e670
--- /dev/null
+++ b/Tests/RunCMake/CMP0069/CMP0069-WARN.cmake
@@ -0,0 +1,4 @@
+set(_CMAKE_IPO_LEGACY_BEHAVIOR NO)
+
+add_executable(foo main.cpp)
+set_target_properties(foo PROPERTIES INTERPROCEDURAL_OPTIMIZATION TRUE)
diff --git a/Tests/RunCMake/CMP0069/CMakeLists.txt b/Tests/RunCMake/CMP0069/CMakeLists.txt
new file mode 100644
index 0000000..375cbdb
--- /dev/null
+++ b/Tests/RunCMake/CMP0069/CMakeLists.txt
@@ -0,0 +1,3 @@
+cmake_minimum_required(VERSION 3.8)
+project(${RunCMake_TEST} CXX)
+include(${RunCMake_TEST}.cmake)
diff --git a/Tests/RunCMake/CMP0069/RunCMakeTest.cmake b/Tests/RunCMake/CMP0069/RunCMakeTest.cmake
new file mode 100644
index 0000000..61ba458
--- /dev/null
+++ b/Tests/RunCMake/CMP0069/RunCMakeTest.cmake
@@ -0,0 +1,11 @@
+include(RunCMake)
+
+run_cmake(CMP0069-OLD)
+run_cmake(CMP0069-NEW-cmake)
+run_cmake(CMP0069-NEW-compiler)
+run_cmake(CMP0069-WARN)
+
+string(COMPARE EQUAL "${RunCMake_GENERATOR}" "Xcode" is_xcode)
+if(is_xcode OR RunCMake_GENERATOR MATCHES "^Visual Studio ")
+  run_cmake(CMP0069-NEW-generator)
+endif()
diff --git a/Tests/RunCMake/CMP0069/main.cpp b/Tests/RunCMake/CMP0069/main.cpp
new file mode 100644
index 0000000..5047a34
--- /dev/null
+++ b/Tests/RunCMake/CMP0069/main.cpp
@@ -0,0 +1,3 @@
+int main()
+{
+}
diff --git a/Tests/RunCMake/CMakeLists.txt b/Tests/RunCMake/CMakeLists.txt
index 217f0d5..0715a1a 100644
--- a/Tests/RunCMake/CMakeLists.txt
+++ b/Tests/RunCMake/CMakeLists.txt
@@ -107,6 +107,7 @@ add_RunCMake_test(CMP0064)
 if(CMAKE_SYSTEM_NAME MATCHES Darwin AND CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG)
   add_RunCMake_test(CMP0068)
 endif()
+add_RunCMake_test(CMP0069)
 
 # The test for Policy 65 requires the use of the
 # CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS variable, which both the VS and Xcode
diff --git a/Tests/RunCMake/CheckIPOSupported/CMakeLists.txt b/Tests/RunCMake/CheckIPOSupported/CMakeLists.txt
index a0effc9..4a13d29 100644
--- a/Tests/RunCMake/CheckIPOSupported/CMakeLists.txt
+++ b/Tests/RunCMake/CheckIPOSupported/CMakeLists.txt
@@ -1,4 +1,7 @@
 cmake_minimum_required(VERSION 3.0)
 project(${RunCMake_TEST} NONE)
+
+cmake_policy(SET CMP0069 NEW)
+
 include(CheckIPOSupported)
 include(${RunCMake_TEST}.cmake)
diff --git a/Tests/RunCMake/CheckIPOSupported/RunCMakeTest.cmake b/Tests/RunCMake/CheckIPOSupported/RunCMakeTest.cmake
index 2815037..812f79b 100644
--- a/Tests/RunCMake/CheckIPOSupported/RunCMakeTest.cmake
+++ b/Tests/RunCMake/CheckIPOSupported/RunCMakeTest.cmake
@@ -7,6 +7,7 @@ run_cmake(default-lang-none)
 run_cmake(not-supported-by-cmake)
 run_cmake(not-supported-by-compiler)
 run_cmake(save-to-result)
+run_cmake(cmp0069-is-old)
 
 if(RunCMake_GENERATOR MATCHES "^(Visual Studio |Xcode$)")
   run_cmake(not-supported-by-generator)
diff --git a/Tests/RunCMake/CheckIPOSupported/cmp0069-is-old-result.txt b/Tests/RunCMake/CheckIPOSupported/cmp0069-is-old-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/CheckIPOSupported/cmp0069-is-old-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/CheckIPOSupported/cmp0069-is-old-stderr.txt b/Tests/RunCMake/CheckIPOSupported/cmp0069-is-old-stderr.txt
new file mode 100644
index 0000000..f183594
--- /dev/null
+++ b/Tests/RunCMake/CheckIPOSupported/cmp0069-is-old-stderr.txt
@@ -0,0 +1,5 @@
+^CMake Error at .*/Modules/CheckIPOSupported\.cmake:[0-9]+ \(message\):
+  Policy CMP0069 set to OLD
+Call Stack \(most recent call first\):
+  cmp0069-is-old\.cmake:[0-9]+ \(check_ipo_supported\)
+  CMakeLists\.txt:[0-9]+ \(include\)$
diff --git a/Tests/RunCMake/CheckIPOSupported/cmp0069-is-old.cmake b/Tests/RunCMake/CheckIPOSupported/cmp0069-is-old.cmake
new file mode 100644
index 0000000..14fed04
--- /dev/null
+++ b/Tests/RunCMake/CheckIPOSupported/cmp0069-is-old.cmake
@@ -0,0 +1,6 @@
+project(${RunCMake_TEST} LANGUAGES C CXX)
+
+cmake_policy(SET CMP0069 OLD)
+
+include(CheckIPOSupported)
+check_ipo_supported()
diff --git a/Tests/RunCMake/TargetPolicies/PolicyList-stderr.txt b/Tests/RunCMake/TargetPolicies/PolicyList-stderr.txt
index 78657ef..5f6be87 100644
--- a/Tests/RunCMake/TargetPolicies/PolicyList-stderr.txt
+++ b/Tests/RunCMake/TargetPolicies/PolicyList-stderr.txt
@@ -21,6 +21,7 @@
    \* CMP0063
    \* CMP0065
    \* CMP0068
+   \* CMP0069
 
 Call Stack \(most recent call first\):
   CMakeLists.txt:3 \(include\)