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.

15 files changed, 69 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()
+{
+}