CMake: Add I18N_NATIVE_LANGUAGE keyword to qt_standard_project_setup

[ChangeLog][CMake] Added variable QT_I18N_NATIVE_LANGUAGE to specify the
native language that is used in the source code for translatable
strings.

[ChangeLog][CMake] Added keyword I18N_NATIVE_LANGUAGE to
qt_standard_project_setup to conveniently set QT_I18N_NATIVE_LANGUAGE.

Task-number: QTBUG-115845
Change-Id: I079256507685afe5eccda78beffff819292494bf
Reviewed-by: Amir Masoud Abdol <amir.abdol@qt.io>
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

3 files changed, 32 insertions, 0 deletions

diff --git a/src/corelib/Qt6CoreMacros.cmake b/src/corelib/Qt6CoreMacros.cmake
index 9f8e6bb591..24ff7911e1 100644
--- a/src/corelib/Qt6CoreMacros.cmake
+++ b/src/corelib/Qt6CoreMacros.cmake
@@ -2968,6 +2968,7 @@ macro(qt6_standard_project_setup)
         set(__qt_sps_args_single
             REQUIRES
             SUPPORTS_UP_TO
+            I18N_NATIVE_LANGUAGE
         )
         set(__qt_sps_args_multi
             I18N_LANGUAGES
@@ -3075,6 +3076,9 @@ macro(qt6_standard_project_setup)
         if(DEFINED __qt_sps_arg_I18N_LANGUAGES AND NOT DEFINED QT_I18N_LANGUAGES)
             set(QT_I18N_LANGUAGES ${__qt_sps_arg_I18N_LANGUAGES})
         endif()
+        if(DEFINED __qt_sps_arg_I18N_NATIVE_LANGUAGE AND NOT DEFINED QT_I18N_NATIVE_LANGUAGE)
+            set(QT_I18N_NATIVE_LANGUAGE ${__qt_sps_arg_I18N_NATIVE_LANGUAGE})
+        endif()
     endif()
 endmacro()
 
diff --git a/src/corelib/doc/src/cmake/cmake-configure-variables.qdoc b/src/corelib/doc/src/cmake/cmake-configure-variables.qdoc
index a947c87a05..61a62ba4fb 100644
--- a/src/corelib/doc/src/cmake/cmake-configure-variables.qdoc
+++ b/src/corelib/doc/src/cmake/cmake-configure-variables.qdoc
@@ -507,6 +507,30 @@ This variable can be conveniently set with the
 */
 
 /*!
+\page cmake-variable-qt-i18n-native-language.html
+\ingroup cmake-variables-qtcore
+
+\title QT_I18N_NATIVE_LANGUAGE
+\target cmake-variable-QT_I18N_NATIVE_LANGUAGE
+
+\summary {Specifies the language of translatable strings}
+
+\cmakevariablesince 6.7
+
+This variable specifies the language of translatable strings in the source code.
+The language must be compatible with the string-based \l QLocale constructor.
+
+Together with \c{QT_I18N_LANGUAGES}, this variable is used to determine the
+names of \c{.ts} files for \l{qt6_add_translations}{qt_add_translations()}.
+
+This variable can be conveniently set with the
+{qt6_standard_project_setup}{qt_standard_project_setup()} command.
+
+\sa {qt6_standard_project_setup}{qt_standard_project_setup()}
+\sa {qt6_add_translations}{qt_add_translations()}
+*/
+
+/*!
 \page cmake-variable-qt-ios-launch-screen.html
 \ingroup cmake-variables-qtcore
 
diff --git a/src/corelib/doc/src/cmake/qt_standard_project_setup.qdoc b/src/corelib/doc/src/cmake/qt_standard_project_setup.qdoc
index 9dcbab6dc5..e478148d2e 100644
--- a/src/corelib/doc/src/cmake/qt_standard_project_setup.qdoc
+++ b/src/corelib/doc/src/cmake/qt_standard_project_setup.qdoc
@@ -21,6 +21,7 @@ qt_standard_project_setup(
     [REQUIRES <version>]
     [SUPPORTS_UP_TO <version>]
     [I18N_LANGUAGES <language...>]
+    [I18N_NATIVE_LANGUAGE <language>]
 )
 \endcode
 
@@ -88,6 +89,9 @@ Since Qt 6.7, it is possible to specify the languages that are used for project
 internationalization with the \c I18N_LANGUAGES argument. See \l
 QT_I18N_LANGUAGES for details.
 
+Use I18N_NATIVE_LANGUAGE to specify the native language that translatable
+strings are written in. See \l QT_I18N_NATIVE_LANGUAGE for details.
+
 \section1 Example
 
 \include cmake-generate-deploy-app-script.qdocinc