GCC编译优化

Gcc 优化选项注意事项

http://blog.csdn.net/jiayanhui2877/article/details/11615471

防止GCC优化

http://blog.csdn.net/cuijianzhongswust/article/details/7965784

GCC___attribute__关键字和字节对齐

http://blog.csdn.net/sno_guo/article/details/8042332

Function Specific Option Pragmas

https://gcc.gnu.org/onlinedocs/gcc-4.4.2/gcc/Function-Specific-Option-Pragmas.html