我有 Qt Creator 向导创建的 QML 扩展插件。当我尝试为 Android 编译它时，编译失败并显示消息：
mingw32-make[1]: 进入目录 'F:/work/app-project/build-app-Android_for_armeabi_GCC_4_8_Qt_5_3_1-Debug/extention'
mingw32-make[1]: *** 没有规则来制作目标 'F:\work\ app-project\build-app-Android_for_armeabi_GCC_4_8_Qt_5_3_1-Debug\extention\qmldir'，'libextention.so' 需要。停止。
扩展.pro文件有什么问题？主机操作系统 - Windows 7，Qt - 5.3.1
TEMPLATE = lib
TARGET = extention
QT += qml quick declarative
CONFIG += qt plugin
TARGET = $$qtLibraryTarget($$TARGET)
uri = com.example.extention
# Input
SOURCES += \
Plugin.cpp \
extention.cpp
HEADERS += \
Plugin.h \
extention.h
OTHER_FILES = qmldir
!equals(_PRO_FILE_PWD_, $$OUT_PWD) {
copy_qmldir.target = $$OUT_PWD/qmldir
copy_qmldir.depends = $$_PRO_FILE_PWD_/qmldir
copy_qmldir.commands = $(COPY_FILE) \"$$replace(copy_qmldir.depends, /, $$QMAKE_DIR_SEP)\" \"$$replace(copy_qmldir.target, /, $$QMAKE_DIR_SEP)\"
QMAKE_EXTRA_TARGETS += copy_qmldir
PRE_TARGETDEPS += $$copy_qmldir.target
}
qmldir.files = qmldir
unix {
installPath = $$[QT_INSTALL_QML]/$$replace(uri, \\., /)
qmldir.path = $$installPath
target.path = $$installPath
INSTALLS += target qmldir
}