How to calculate gcc compilation time?

Question

I want to know GCC compile time. Does GCC have any command or option for calculate compile time?

I have a file named hello.c and will compile it. I want to know the time

Answer 1

You can use the time utility:

$ time gcc -c hello.c

real    0m0.224s
user    0m0.013s
sys     0m0.010s

Here's a link to the man page.