cmake: Use TYPE property to tell Qt libraries type

src/qt/CMakeLists.txt

@@ -11,8 +11,10 @@ if(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
   string(APPEND CMAKE_OBJCXX_COMPILE_OBJECT " ${APPEND_CPPFLAGS} ${APPEND_CXXFLAGS}")
 endif()
 
+get_target_property(qt_lib_type Qt5::Core TYPE)
+
 function(import_plugins target)
-  if(QT_IS_STATIC)
+  if(qt_lib_type STREQUAL "STATIC_LIBRARY")
     set(plugins Qt5::QMinimalIntegrationPlugin)
     if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
       list(APPEND plugins Qt5::QXcbIntegrationPlugin)
@@ -37,21 +39,6 @@ set(CMAKE_AUTORCC ON)
 set(CMAKE_AUTOUIC ON)
 set(CMAKE_AUTOUIC_SEARCH_PATHS forms)
 
-include(CMakePushCheckState)
-cmake_push_check_state(RESET)
-set(CMAKE_REQUIRED_LIBRARIES Qt5::Core)
-include(CheckCXXSourceCompiles)
-check_cxx_source_compiles("
-  #include <QtGlobal>
-
-  #if !defined(QT_STATIC)
-  #error Qt is not static
-  #endif
-  int main() {}
-  " QT_IS_STATIC
-)
-cmake_pop_check_state()
-
 # TODO: The file(GLOB ...) command should be replaced with an explicit
 # file list. Such a change must be synced with the corresponding change
 # to https://github.com/bitcoin-core/bitcoin-maintainer-tools/blob/main/update-translations.py
@@ -229,7 +216,7 @@ if(WITH_DBUS)
   target_link_libraries(bitcoinqt PRIVATE Qt5::DBus)
 endif()
 
-if(QT_IS_STATIC)
+if(qt_lib_type STREQUAL "STATIC_LIBRARY")
   # We want to define static plugins to link ourselves, thus preventing
   # automatic linking against a "sane" set of default static plugins.
   qt5_import_plugins(bitcoinqt