On Sat, 2012-05-26 at 17:21 -0600, Frank Cox wrote: > Ok, then where does it come from, since it's not the current kernel version and > it's not the elfutils version? gcc somehow finds that number and inserts it > into the binary. Where did it find it and why is that number not the same as > the other stuff, notably the kernel, since it appears to be a kernel version > number? Just not the current kernel version number. An educated guess would be because the C and C++ ABI is backwards compatable with el5. Check it out...build the code on el5 and it should run under el6. For el5 you need the gcc44 update package. John