请问DS-5下如何创建一个简单的HelloWorld工程并进行Debug呢

Although DS-5 shows that error: ERROR(TAB180), the FVP model will still be able to handle semihosting instead as far as I can tell:

You can ignore this error message by telling DS-5 Debugger not to enable semihosting using a .ds script and: set semihosting enabled off