fix CMake "qt_install_lang()"

qad/cmake/QtWraps.cmake

@@ -94,12 +94,12 @@ e.g. "qt_install(LANG my_QM DESTINATION QtLang)"
 
 
 
-qt_install_lang(<name> DESTINATION <dir>)
+qt_install_lang(<name> DESTINATION <dir> [PATHS <path0> [<path1>] [...] ])
 
 Search Qt translations for all <name> dependencies
 in Qt<?>_LANG_DIR for <name>_LANG languages
-and install them to <dir>. You can you "set_lang()" macro
+and install them to <dir>. PATH are additional search paths.
-before this action
+You should use "set_lang()" macro before this action
 
 ]]
 
@@ -665,9 +665,25 @@ macro(qt_install)
 endmacro()
 
 
-macro(qt_install_lang _NAME _dest_tag _DEST)
+macro(qt_install_lang _NAME)
 	set(_prev_inst)
 	#message("command: ${ARGN}")
+	set(_PATHS)
+	set(_DEST)
+	if(CMAKE_CROSSCOMPILING)
+		list(APPEND _PATHS "${CMAKE_PREFIX_PATH}/lang")
+	endif()
+	set(_cur_arg)
+	set(__args "DESTINATION;PATHS")
+	foreach(_i ${ARGN})
+		if (_i IN_LIST __args)
+			set(_cur_arg "${_i}")
+		elseif("${_cur_arg}" STREQUAL "DESTINATION")
+			set(_DEST "${_i}")
+		elseif("${_cur_arg}" STREQUAL "PATHS")
+			list(APPEND _PATHS "${_i}")
+		endif()
+	endforeach()
 	foreach(_v ${_QT_VERSIONS_})
 		if (LOCAL_FOUND${_v})
 			set(_target)
@@ -702,7 +718,8 @@ macro(qt_install_lang _NAME _dest_tag _DEST)
 				list(APPEND _qt_libs "qtbase")
 				foreach (_i ${${PROJECT_NAME}_LANG})
 					foreach (_l ${_qt_libs})
-						set(_qm_path "${Qt${_v}_LANG_DIR}/${_l}_${_i}.qm")
+						unset(_qm_path CACHE)
+						find_file(_qm_path "${_l}_${_i}.qm" PATHS "${Qt${_v}_LANG_DIR}" ${_PATHS} NO_DEFAULT_PATH)
 						if (EXISTS "${_qm_path}")
 							install(FILES ${_qm_path} DESTINATION "${_DEST}")
 							#message("qm = \"${_qm_path}\"")