At 04:05 AM 8/10/2009, Andrew Haley wrote: >> According to the documentation[1] this flag shouldn't have any >> effect at all because I am building for 64 bit Intel. > >I can't find that reference. Can you please quote the section to >which you are referring? http://gcc.gnu.org/onlinedocs/gcc-4.3.3/gcc/Code-Gen-Options.html#Code-Gen-Options -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, PowerPC and SPARC. Position-independent code requires special support, and therefore works only on certain machines. When this flag is set, the macros __pic__ and __PIC__ are defined to 2. >I can't see why the size of a class should change. Is the behavior sufficiently anomalous that it would be worth generating a smaller example?