-fpic
Generate position-independent code (PIC) suitable for use in a shared library, if supported for the target
machine. Such code accesses all constant addresses through a global offset table (GOT). The dynamic 
loader resolves the GOT entries when the program starts (the dynamic loader is not part of GCC; it is part of the
perating system). If the GOT size for the linked executable exceeds a machine-specific maximum size, you
get an error message from the linker indicating that -fpic does not work; in that case, recompile with 
-fPIC instead. (These maximums are 16k on the m88k, 8k on the SPARC, and 32k on the m68k and RS/6000. The 386 
has no such limit.)
Position-independent code requires special support, and therefore works only on certain machines. For the
386, GCC supports PIC for System V but not for the Sun 386i. Code generated for the IBM RS/6000 is always
position-independent.
-fPIC
If supported for the target machine, emit position-independent code, suitable for dynamic linking and 
avoiding any limit on the size of the global offset table. This option makes a difference on the m68k, m88k, 
and the SPARC.
Position-independent code requires special support, and therefore works only on certain machines.
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