CMake: Implement configure -qreal <type>

The configure argument -qreal <type> maps to the CMake argument
-DQT_COORD_TYPE=<type>.

Fixes: QTBUG-83325
Change-Id: I94970f31ccfb241b1dd4f1d9b6cef25d6684dc05
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

cmake/QtBuild.cmake

@@ -142,6 +142,10 @@ else()
     set(QT_STAGING_PREFIX "${CMAKE_INSTALL_PREFIX}")
 endif()
 
+if(PROJECT_NAME STREQUAL "QtBase")
+    set(QT_COORD_TYPE double CACHE STRING "Type of qreal")
+endif()
+
 function(qt_internal_set_up_global_paths)
     # Compute the values of QT_BUILD_DIR, QT_INSTALL_DIR, QT_CONFIG_BUILD_DIR, QT_CONFIG_INSTALL_DIR
     # taking into account whether the current build is a prefix build or a non-prefix build,

cmake/QtPriHelpers.cmake

@@ -652,7 +652,7 @@ CONFIG += ${private_config_joined}
         string(APPEND content "PKG_CONFIG_EXECUTABLE = ${PKG_CONFIG_EXECUTABLE}\n")
     endif()
 
-    # TODO: Write QT_COORD_TYPE once we support setting it.
+    string(APPEND content "QT_COORD_TYPE = ${QT_COORD_TYPE}\n")
 
     qt_get_build_parts(build_parts)
     string(REPLACE ";" " " build_parts "${build_parts}")

cmake/QtProcessConfigureArgs.cmake

@@ -534,6 +534,7 @@ translate_boolean_input(precompile_header BUILD_WITH_PCH)
 translate_boolean_input(ccache QT_USE_CCACHE)
 translate_boolean_input(shared BUILD_SHARED_LIBS)
 translate_string_input(qt_namespace QT_NAMESPACE)
+translate_string_input(qreal QT_COORD_TYPE)
 translate_path_input(prefix CMAKE_INSTALL_PREFIX)
 translate_path_input(extprefix CMAKE_STAGING_PREFIX)
 foreach(kind bin lib archdata libexec qml data doc translation sysconf examples tests)

cmake/configure-cmake-mapping.md

@@ -56,7 +56,7 @@ The effort of this is tracked in QTBUG-85373 and QTBUG-85349.
 | -c++std c++2a                         | -DFEATURE_cxx2a=ON                                |                                                                 |
 | -sse2/sse3/-ssse3/-sse4.1             |                                                   |                                                                 |
 | -mips_dsp/-mips_dspr2                 |                                                   |                                                                 |
-| -qreal <type>                         |                                                   |                                                                 |
+| -qreal <type>                         | -DQT_COORD_TYPE=<type>                            |                                                                 |
 | -R <string>                           | -DQT_EXTRA_RPATHS=path1;path2                     |                                                                 |
 | -rpath                                | negative CMAKE_SKIP_BUILD_RPATH                   |                                                                 |
 |                                       | negative CMAKE_SKIP_INSTALL_RPATH                 |                                                                 |

configure.cmake

@@ -797,6 +797,12 @@ qt_feature("dbus-linked" PRIVATE
     ENABLE INPUT_dbus STREQUAL 'linked'
     DISABLE INPUT_dbus STREQUAL 'runtime'
 )
+qt_feature("qreal"
+    LABEL "Type for qreal"
+    CONDITION DEFINED QT_COORD_TYPE AND NOT QT_COORD_TYPE STREQUAL "double"
+)
+qt_feature_definition("qreal" "QT_COORD_TYPE" VALUE "${QT_COORD_TYPE}")
+qt_feature_definition("qreal" "QT_COORD_TYPE_STRING" VALUE "\"${QT_COORD_TYPE}\"")
 qt_feature("gui" PRIVATE
     LABEL "Qt Gui"
 )

util/cmake/configurejson2cmake.py

@@ -886,6 +886,21 @@ def get_feature_mapping():
         "profile": None,
         "qmakeargs": None,
         "qpa_default_platform": None,  # Not a bool!
+        "qreal" : {
+            "condition": "DEFINED QT_COORD_TYPE AND NOT QT_COORD_TYPE STREQUAL \"double\"",
+            "output": [
+                {
+                    "type": "define",
+                    "name": "QT_COORD_TYPE",
+                    "value": "${QT_COORD_TYPE}",
+                },
+                {
+                    "type": "define",
+                    "name": "QT_COORD_TYPE_STRING",
+                    "value": "\\\"${QT_COORD_TYPE}\\\"",
+                },
+            ],
+        },
         "release": None,
         "release_tools": None,
         "rpath": {