Sdílené knihovny
PIC je Position Independent Code
u x86 arch dostupné
u x86_64 shared libs vyžadováno!!
http://stackoverflow.com/questions/7865059/why-does-gcc-force-pic-for-x64-shared-libs
jde o to, ze pro 64 bit už nestačí ty 32bit relativní adresy..
http://eli.thegreenplace.net/2011/11/03/position-independent-code-pic-in-shared-libraries/
co je to PIC
https://www.technovelty.org/c/position-independent-code-and-x86-64-libraries.html
co je PIC
http://eli.thegreenplace.net/2011/08/25/load-time-relocation-of-shared-libraries/
co je Load-time relocation