Begin port of qtbase to CMake

Done-by: Alexandru Croitor <alexandru.croitor@qt.io>
Done-by: Frederik Gladhorn <frederik.gladhorn@qt.io>
Done-by: Kevin Funk <kevin.funk@kdab.com>
Done-by: Mikhail Svetkin <mikhail.svetkin@qt.io>
Done-by: Simon Hausmann <simon.hausmann@qt.io>
Done-by: Tobias Hunger <tobias.hunger@qt.io>
Done-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Done-by: Volker Krause <volker.krause@kdab.com>
Change-Id: Ida4f8bd190f9a4849a1af7b5b7981337a5df5310
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
Reviewed-by: Mikhail Svetkin <mikhail.svetkin@qt.io>

3 files changed, 84 insertions, 0 deletions

diff --git a/cmake/tests/features/CMakeLists.txt b/cmake/tests/features/CMakeLists.txt
new file mode 100644
index 0000000000..0208e3d890
--- /dev/null
+++ b/cmake/tests/features/CMakeLists.txt
@@ -0,0 +1,42 @@
+cmake_minimum_required(VERSION 3.12.0)
+
+project(FeaturesTest
+    VERSION 1.0.0
+    DESCRIPTION "QtFeature test"
+    HOMEPAGE_URL "https://qt.io/"
+    LANGUAGES CXX C
+)
+
+## Add some paths to check for cmake modules:
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/../../;${CMAKE_CURRENT_SOURCE_DIR}/../../3rdparty/extra-cmake-modules/find-modules;${CMAKE_CURRENT_SOURCE_DIR}/../../3rdparty/kwin")
+
+## Qt specific setup common for all modules:
+include(QtSetup)
+
+## Library to hold global features:
+add_library(Qt_global_Config INTERFACE)
+
+qt_feature_module_begin(LIBRARY QtCore
+    PUBLIC_FILE src/corelib/global/qconfig.h
+    PRIVATE_FILE src/corelib/global/qconfig_p.h
+)
+include("${CMAKE_CURRENT_SOURCE_DIR}/configure.cmake")
+qt_feature_module_end(Qt_global_Config)
+
+assert(QT_FEATURE_top_a STREQUAL "ON")
+assert(QT_FEATURE_top_b STREQUAL "OFF")
+assert(QT_FEATURE_top_enabled STREQUAL "ON")
+assert(QT_FEATURE_top_disabled STREQUAL "OFF")
+assert(QT_FEATURE_top_disabled_enabled STREQUAL "OFF")
+assert(NOT DEFINED QT_FEATURE_top_not_emitted)
+
+## Enable feature summary at the end of the configure run:
+include(FeatureSummary)
+
+add_subdirectory(src)
+
+## Delayed actions on some of the Qt targets:
+include(QtPostProcess)
+
+## Print a feature summary:
+feature_summary(WHAT PACKAGES_FOUND PACKAGES_NOT_FOUND FATAL_ON_MISSING_REQUIRED_PACKAGES)
diff --git a/cmake/tests/features/configure.cmake b/cmake/tests/features/configure.cmake
new file mode 100644
index 0000000000..ace2b62450
--- /dev/null
+++ b/cmake/tests/features/configure.cmake
@@ -0,0 +1,35 @@
+#### Features
+
+# This belongs into gui, but the license check needs it here already.
+qt_feature("top_a" PRIVATE
+    LABEL "top_a"
+    CONDITION ON
+)
+qt_feature("top_b" PUBLIC PRIVATE
+    LABEL "top_b"
+    AUTODETECT OFF
+)
+qt_feature_definition("top_a" "top_defa")
+
+qt_feature("top_enabled" PRIVATE
+    LABEL "top_enabled"
+    ENABLE ON
+)
+
+qt_feature("top_disabled" PRIVATE
+    LABEL "top_enabled"
+    DISABLE ON
+)
+
+qt_feature("top_disabled_enabled" PRIVATE
+    LABEL "top_enabled_enabled"
+    DISABLE ON
+    ENABLE ON
+)
+
+qt_feature("top_not_emitted" PRIVATE
+    LABEL "top_not_emitted"
+    EMIT_IF OFF
+)
+
+qt_extra_definition("top_extra" "PUBLIC_FOO" PUBLIC)
diff --git a/cmake/tests/features/src/CMakeLists.txt b/cmake/tests/features/src/CMakeLists.txt
new file mode 100644
index 0000000000..1a31dbc8c5
--- /dev/null
+++ b/cmake/tests/features/src/CMakeLists.txt
@@ -0,0 +1,7 @@
+## Features from parent scope were inherited:
+assert(QT_FEATURE_top_a STREQUAL "ON")
+assert(QT_FEATURE_top_b STREQUAL "OFF")
+assert(QT_FEATURE_top_enabled STREQUAL "ON")
+assert(QT_FEATURE_top_disabled STREQUAL "OFF")
+assert(QT_FEATURE_top_disabled_enabled STREQUAL "OFF")
+assert(NOT DEFINED QT_FEATURE_top_not_emitted)