GIT_SILENT: apply flags if we use source from git

CMakeLists.txt

@@ -35,9 +35,12 @@ include(ECMQtDeclareLoggingCategory)
 include(GenerateExportHeader)
 
 add_definitions(-DTRANSLATION_DOMAIN="kdebugsettings")
-add_definitions( -DQT_DISABLE_DEPRECATED_BEFORE=0x060000 )
 add_definitions(-DQT_NO_FOREACH)
-add_definitions(-DKF_DISABLE_DEPRECATED_BEFORE_AND_AT=0x060000)
+if (EXISTS "${CMAKE_SOURCE_DIR}/.git")
+   add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0x060000)
+   add_definitions(-DKF_DISABLE_DEPRECATED_BEFORE_AND_AT=0x060000)
+endif()
+
 configure_file(config-kdebugsettings.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config-kdebugsettings.h)
 
 set(KDEBUGSETTINGS_LIB_VERSION "${KDE_APPLICATIONS_VERSION}")