摘要:
I just did a clean install of 12.04 and everything went fine. Then I started adding some software packages and was asked to restart so I did.But then I got the error "failed to load session ubuntu".So after searching around a bit I found a post that said to do the following:sudo apt-get up 阅读全文
摘要:
.在KeilARM的LPCARM,存在(1<<31)编译警告问题main.c(174): warning: #61-D: integer operation result is out of rangemain.c(174): warning: #68-D: integer conversion resulted in a change of sign由于编译器默认signed int即32位有符号整数类型,而1<<31实际为0x80000000,这样就有可能改写了符号位(最高位)依此类推,(2<<30),(3<<29)...等都会出现编译警告问 阅读全文