On 11/07/2016 12:59, 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. That's unexpected :-( $ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=14.04 DISTRIB_CODENAME=trusty DISTRIB_DESCRIPTION="Ubuntu 14.04.4 LTS" $ man gcc (last line states gcc-4.8, dated 2015-04-26) Search for Generate position-independent code Jumps to -fpic and -fPIC descriptions. https://gcc.gnu.org/onlinedocs/gcc-4.8.4/gcc/Code-Gen-Options.html Regards.
