Autogen: Process GENERATED files. Add CMP0071.

This lets AUTOMOC and AUTOUIC process GENERATED files which
used to be ignored before.
A new policy CMP0071 ensures that the old behavior of ignoring
GENERATED files is enabled when the CMake compatibility version
CMAKE_MINIMUM_REQUIRED is < 3.10.

Closes #16186

7 files changed, 98 insertions, 0 deletions

diff --git a/Tests/QtAutogen/mocCMP0071/CMakeLists.txt b/Tests/QtAutogen/mocCMP0071/CMakeLists.txt
new file mode 100644
index 0000000..003fa08
--- /dev/null
+++ b/Tests/QtAutogen/mocCMP0071/CMakeLists.txt
@@ -0,0 +1,4 @@
+cmake_minimum_required(VERSION 3.9)
+project(mocCMP0071 CXX)
+add_subdirectory(OLD)
+add_subdirectory(NEW)
diff --git a/Tests/QtAutogen/mocCMP0071/NEW/CMakeLists.txt b/Tests/QtAutogen/mocCMP0071/NEW/CMakeLists.txt
new file mode 100644
index 0000000..0237afc
--- /dev/null
+++ b/Tests/QtAutogen/mocCMP0071/NEW/CMakeLists.txt
@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.9)
+cmake_policy(SET CMP0071 NEW)
+
+# *Generate* files
+set(CSD ${CMAKE_CURRENT_SOURCE_DIR})
+set(CBD ${CMAKE_CURRENT_BINARY_DIR})
+add_custom_command(
+  OUTPUT ${CBD}/Obj_p.h ${CBD}/Obj.hpp ${CBD}/Obj.cpp ${CBD}/main.cpp
+  COMMAND ${CMAKE_COMMAND} -E copy ${CSD}/../Obj_p.h ${CBD}/Obj_p.h
+  COMMAND ${CMAKE_COMMAND} -E copy ${CSD}/../Obj.hpp ${CBD}/Obj.hpp
+  COMMAND ${CMAKE_COMMAND} -E copy ${CSD}/../Obj.cpp ${CBD}/Obj.cpp
+  COMMAND ${CMAKE_COMMAND} -E copy ${CSD}/../main.cpp ${CBD}/main.cpp)
+
+add_executable(mocCMP0071New ${CBD}/Obj.cpp ${CBD}/main.cpp)
+target_link_libraries(mocCMP0071New ${QT_LIBRARIES})
+set_target_properties(mocCMP0071New PROPERTIES AUTOMOC ON)
diff --git a/Tests/QtAutogen/mocCMP0071/OLD/CMakeLists.txt b/Tests/QtAutogen/mocCMP0071/OLD/CMakeLists.txt
new file mode 100644
index 0000000..5699433
--- /dev/null
+++ b/Tests/QtAutogen/mocCMP0071/OLD/CMakeLists.txt
@@ -0,0 +1,18 @@
+cmake_minimum_required(VERSION 3.9)
+cmake_policy(SET CMP0071 OLD)
+
+# *Generate* files
+set(CSD ${CMAKE_CURRENT_SOURCE_DIR})
+set(CBD ${CMAKE_CURRENT_BINARY_DIR})
+add_custom_command(
+  OUTPUT ${CBD}/Obj_p.h ${CBD}/Obj.hpp ${CBD}/Obj.cpp ${CBD}/main.cpp
+  COMMAND ${CMAKE_COMMAND} -E copy ${CSD}/../Obj_p.h ${CBD}/Obj_p.h
+  COMMAND ${CMAKE_COMMAND} -E copy ${CSD}/../Obj.hpp ${CBD}/Obj.hpp
+  COMMAND ${CMAKE_COMMAND} -E copy ${CSD}/../Obj.cpp ${CBD}/Obj.cpp
+  COMMAND ${CMAKE_COMMAND} -E copy ${CSD}/../main.cpp ${CBD}/main.cpp)
+
+# Generate moc files externally
+qtx_wrap_cpp(mocCMP0071OldMoc ${CBD}/Obj.hpp ${CBD}/Obj_p.h)
+add_executable(mocCMP0071Old ${CBD}/Obj.cpp ${CBD}/main.cpp ${mocCMP0071OldMoc})
+target_link_libraries(mocCMP0071Old ${QT_LIBRARIES})
+set_target_properties(mocCMP0071Old PROPERTIES AUTOMOC ON)
diff --git a/Tests/QtAutogen/mocCMP0071/Obj.cpp b/Tests/QtAutogen/mocCMP0071/Obj.cpp
new file mode 100644
index 0000000..1ae50ed
--- /dev/null
+++ b/Tests/QtAutogen/mocCMP0071/Obj.cpp
@@ -0,0 +1,20 @@
+#include "Obj.hpp"
+#include "Obj_p.h"
+
+ObjPrivate::ObjPrivate()
+{
+}
+
+ObjPrivate::~ObjPrivate()
+{
+}
+
+Obj::Obj()
+  : d(new ObjPrivate)
+{
+}
+
+Obj::~Obj()
+{
+  delete d;
+}
diff --git a/Tests/QtAutogen/mocCMP0071/Obj.hpp b/Tests/QtAutogen/mocCMP0071/Obj.hpp
new file mode 100644
index 0000000..f064e47
--- /dev/null
+++ b/Tests/QtAutogen/mocCMP0071/Obj.hpp
@@ -0,0 +1,19 @@
+#ifndef OBJ_HPP
+#define OBJ_HPP
+
+#include <QObject>
+
+// Object source comes without any _moc/.moc includes
+class ObjPrivate;
+class Obj : public QObject
+{
+  Q_OBJECT
+public:
+  Obj();
+  ~Obj();
+
+private:
+  ObjPrivate* const d;
+};
+
+#endif
diff --git a/Tests/QtAutogen/mocCMP0071/Obj_p.h b/Tests/QtAutogen/mocCMP0071/Obj_p.h
new file mode 100644
index 0000000..cb1e5df
--- /dev/null
+++ b/Tests/QtAutogen/mocCMP0071/Obj_p.h
@@ -0,0 +1,14 @@
+#ifndef OBJ_P_HPP
+#define OBJ_P_HPP
+
+#include <QObject>
+
+class ObjPrivate : public QObject
+{
+  Q_OBJECT
+public:
+  ObjPrivate();
+  ~ObjPrivate();
+};
+
+#endif
diff --git a/Tests/QtAutogen/mocCMP0071/main.cpp b/Tests/QtAutogen/mocCMP0071/main.cpp
new file mode 100644
index 0000000..3887840
--- /dev/null
+++ b/Tests/QtAutogen/mocCMP0071/main.cpp
@@ -0,0 +1,7 @@
+#include "Obj.hpp"
+
+int main(int argv, char** args)
+{
+  Obj obj;
+  return 0;
+}