gcc -fPIC generates position independent code (PIC) for shared libraries.
Syntax
$ gcc -fPIC [options] [source files] [object files] -o output file
Use -fpic instead of -fPIC to generate more efficient code, if supported by the platform compiler.
Example
Write source file myfile.c:
// myfile.c#include int myfunc()
{ printf("myfunc\n");}
Build myfile.c generates myfile.o:
$ gcc -fPIC -c myfile.c$