警告：此编译单元不包含在frame元数据中指定的factoryClass，无法加载配置的运行时共享库。要在没有运行时共享库的情况下进行编译，请将 -static-link-runtime-shared-libraries 选项设置为true, 或删除 -runtime-shared-libraries 选项。
通过修改FlashBuilder4Adobe Flash Builder 4sdks4.0.0frameworks 下的flex-config.xml，将
<static-link-runtime-shared-libraries>false</static-link-runtime-shared-libraries>
修改为
<static-link-runtime-shared-libraries>true</static-link-runtime-shared-libraries>
即可。