-# Neither Qt4 nor Qt5 consider lconvert relevant, so they don't support finding it...
-# Rather than shipping hacked buildsys files, let's just infer the path from lrelease
-if (QT_LRELEASE_EXECUTABLE)
- get_filename_component(_lrelease_path ${QT_LRELEASE_EXECUTABLE} PATH)
- if (USE_QT5)
- find_program(QT_LCONVERT_EXECUTABLE NAMES lconvert-qt5 lconvert PATHS ${_lrelease_path} NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)
- else()
- find_program(QT_LCONVERT_EXECUTABLE NAMES lconvert-qt4 lconvert PATHS ${_lrelease_path} NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)
+find_package(Qt5 ${QT_MIN_VERSION} REQUIRED COMPONENTS ${qt_components})
+set_package_properties(Qt5 PROPERTIES TYPE REQUIRED
+ URL "https://www.qt.io/"
+ DESCRIPTION "the Qt libraries"
+)
+message(STATUS "Found Qt ${Qt5Core_VERSION}")
+
+# Determine minimum deployment target for macOS supported by Qt
+if(APPLE)
+ if(NOT QMAKE_MACOSX_DEPLOYMENT_TARGET)
+ # qmake cannot be queried directly for QMAKE_MACOSX_DEPLOYMENT_TARGET (it is a mkspec, not a property).
+ # Instead, invoke qmake on an empty project file, which causes it to output the relevant keys and their values
+ # for subsequent parsing.
+ # A file named .qmake.stash is always created, so remove it (and empty.pro) afterwards.
+ set(qmakeEmptyProjectFile "${CMAKE_BINARY_DIR}/empty.pro")
+ set(qmakeStashFile "${CMAKE_BINARY_DIR}/.qmake.stash")
+ file(WRITE ${qmakeEmptyProjectFile} "")
+ get_target_property(QMAKE_EXECUTABLE Qt5::qmake IMPORTED_LOCATION)
+ execute_process(
+ COMMAND ${QMAKE_EXECUTABLE} -E ${qmakeEmptyProjectFile}
+ WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+ OUTPUT_VARIABLE qmakeOutput
+ )
+ file(REMOVE ${qmakeEmptyProjectFile} ${qmakeStashFile})
+ string(REGEX MATCH "QMAKE_MACOSX_DEPLOYMENT_TARGET[ ]*=[ ]*([0-9.]+)" foo ${qmakeOutput})
+ if(NOT CMAKE_MATCH_1)
+ message(FATAL_ERROR "Could not determine the deployment target for Qt")
+ endif()
+ set(QMAKE_MACOSX_DEPLOYMENT_TARGET ${CMAKE_MATCH_1} CACHE INTERNAL "")
+ mark_as_advanced(QMAKE_MACOSX_DEPLOYMENT_TARGET)