find_package(): Add policy to remove the FindQt module

Removing FindQt.cmake gives Qt upstream a path forward to export its
own QtConfig.cmake files which can be found by find_package()
without having to explicitly specify CONFIG. Projects that still
want to use Qt3/4 can call find_package(Qt[34]), include(FindQt),
or add FindQt.cmake to their CMAKE_MODULE_PATH.

6 files changed, 51 insertions, 0 deletions

diff --git a/Tests/RunCMake/find_package/CMP0084-NEW-stderr.txt b/Tests/RunCMake/find_package/CMP0084-NEW-stderr.txt
new file mode 100644
index 0000000..280ff8c
--- /dev/null
+++ b/Tests/RunCMake/find_package/CMP0084-NEW-stderr.txt
@@ -0,0 +1,20 @@
+^CMake Warning at CMP0084-NEW\.cmake:[0-9]+ \(find_package\):
+  No "FindQt\.cmake" found in CMAKE_MODULE_PATH\.
+Call Stack \(most recent call first\):
+  CMakeLists\.txt:3 \(include\)
++
+CMake Warning \(dev\) at CMP0084-NEW\.cmake:[0-9]+ \(find_package\):
+  FindQt\.cmake must either be part of this project itself, in this case
+  adjust CMAKE_MODULE_PATH so that it points to the correct location inside
+  its source tree\.
+
+  Or it must be installed by a package which has already been found via
+  find_package\(\)\.  In this case make sure that package has indeed been found
+  and adjust CMAKE_MODULE_PATH to contain the location where that package has
+  installed FindQt\.cmake\.  This must be a location provided by that package\.
+  This error in general means that the buildsystem of this project is relying
+  on a Find-module without ensuring that it is actually available\.
+
+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/find_package/CMP0084-NEW.cmake b/Tests/RunCMake/find_package/CMP0084-NEW.cmake
new file mode 100644
index 0000000..68fd6cf
--- /dev/null
+++ b/Tests/RunCMake/find_package/CMP0084-NEW.cmake
@@ -0,0 +1,7 @@
+cmake_policy(SET CMP0084 NEW)
+set(_findqt_testing TRUE)
+find_package(Qt MODULE)
+
+if(_findqt_included)
+  message(FATAL_ERROR "FindQt.cmake erroneously included")
+endif()
diff --git a/Tests/RunCMake/find_package/CMP0084-OLD.cmake b/Tests/RunCMake/find_package/CMP0084-OLD.cmake
new file mode 100644
index 0000000..7bd4726
--- /dev/null
+++ b/Tests/RunCMake/find_package/CMP0084-OLD.cmake
@@ -0,0 +1,7 @@
+cmake_policy(SET CMP0084 OLD)
+set(_findqt_testing TRUE)
+find_package(Qt MODULE)
+
+if(NOT _findqt_included)
+  message(FATAL_ERROR "FindQt.cmake not included")
+endif()
diff --git a/Tests/RunCMake/find_package/CMP0084-WARN-stderr.txt b/Tests/RunCMake/find_package/CMP0084-WARN-stderr.txt
new file mode 100644
index 0000000..9ecebd3
--- /dev/null
+++ b/Tests/RunCMake/find_package/CMP0084-WARN-stderr.txt
@@ -0,0 +1,8 @@
+^CMake Warning \(dev\) at CMP0084-WARN\.cmake:[0-9]+ \(find_package\):
+  Policy CMP0084 is not set: The FindQt module does not exist for
+  find_package\(\)\.  Run "cmake --help-policy CMP0084" for policy details\.  Use
+  the cmake_policy command to set the policy and suppress this warning\.
+
+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/find_package/CMP0084-WARN.cmake b/Tests/RunCMake/find_package/CMP0084-WARN.cmake
new file mode 100644
index 0000000..4ea22cb
--- /dev/null
+++ b/Tests/RunCMake/find_package/CMP0084-WARN.cmake
@@ -0,0 +1,6 @@
+set(_findqt_testing TRUE)
+find_package(Qt MODULE)
+
+if(NOT _findqt_included)
+  message(FATAL_ERROR "FindQt.cmake not included")
+endif()
diff --git a/Tests/RunCMake/find_package/RunCMakeTest.cmake b/Tests/RunCMake/find_package/RunCMakeTest.cmake
index c068402..e9f3558 100644
--- a/Tests/RunCMake/find_package/RunCMakeTest.cmake
+++ b/Tests/RunCMake/find_package/RunCMakeTest.cmake
@@ -23,3 +23,6 @@ run_cmake(PolicyPop)
 run_cmake(SetFoundFALSE)
 run_cmake(WrongVersion)
 run_cmake(WrongVersionConfig)
+run_cmake(CMP0084-OLD)
+run_cmake(CMP0084-WARN)
+run_cmake(CMP0084-NEW)