What 's the optimize option -O2 do?
When i was using icpc to compile my project on linux with -g -O2. I found a segment fault error. While It works when I delete -O2. So how many detail options in -O2 ? How can I fix my problem?
BTW, I used makecontext when I was generating fiber threads.
Thanks Sergey Kostrov
I is hard to post my project as it is too large!
I've tested to add -fno-builtin option in a test project! With this option, I got the same assemble code using gcc and icc in a test code. I will test it in my project. I will post further result if i get some error.