Precondition: I invoke gcc with -O2 optimization flag and clang with -O2 optimization flag.
Does it means the options list passed to the compilers will be the same?
Do clang understand standard GCC options like -funroll-loops?
I did not find anything useful about this question in manual:
http://llvm.org/releases/3.3/tools/clang/docs/UsersManual.html
I can not even find a list of possible GCC compatible options that can be used with clang.
Do clang even do anything with GCC options (or it just ignore them?)
I just need some clarifications on how it work.