PSoC API再生导致代码消失

嘿。。我的问题如下：
我使用PSoC 5，一个UART和LCD作为外围设备，两个中断连接到UART块的RX和TX中断。在主.c中，我定义了一个变量[UntUn8用户控件]，我打算用UART中断来更新它：所以在中断头文件ISCXXX.H i中创建了一个条目[EXTEND UntualUnt8UsRuxMeal]。现在的问题是，每当我对顶层设计进行一些更改时，例如更改外围设备或设置——所有的API文件都被重新编译，而我的“外部”条目就消失了，编译失败。
既然我知道这一点，我可以回去再加一次，但是当有更多的变量时，它会变成一个皮塔。有什么解决办法吗？我注意到，在ISR函数内的μ码保持在某种程度上保持完整。
谢谢，
牛宿



     以下为原文
  Hey.. my problem is as follows:
    I'm using the PSoC 5, with a UART and LCD as peripherals and two interrupts tied to the Rx and Tx interrupts of the UART block. In main.c I have defined a variable [volatile uint8 user_control] which i intend will be updated by the UART interrupt: So in the interrupt header file isc_xxx.h i made an entry [extern volatile uint8 user_control]. Now the problem is that whenever i mak some changes to the top design; e.g. changing peripherals or settings - all the API files are recompiled and my 'extern' entry is gone - and the compile fails.
    Now since I know this I am able to go back and add it again, but when there are more variables in more it'll be a PITA. Is there some workaround or anything? I notice that _code_ inside the isr functions remains intact somehow...
    Thanks,
    Abhijit