On Mon, Jul 11, 2016 at 06:59:44PM +0800, Yubin Ruan wrote: > I really search carefully in the man pages on my Ubuntu/Linux-14.04-LTS. I > cannot find much description about that. Afterwards I find the online manual > that you describe. > > Actually, I wonder why the man pages on my Ubuntu/Linux is so different from > that online. The man pages that are installed in gcc make install are generated from the same texinfo sources as the online docs and do contain the -fpic option description. So, are you sure you've looked at man gcc or man g++ carefully? I don't have access to Ubuntu, but it would be really surprising if they override the man page with something different. Anyway, gcc mailing list is for development of GCC, so I'm CCing gcc-help instead where this thread should be moved instead. Jakub
