2013/6/18 Ian Lance Taylor <iant@xxxxxxxxxx>: > On Mon, Jun 17, 2013 at 10:21 PM, Gene Smith <gds@xxxxxxxxxxxxx> wrote: >> Is this difference expected? Should -g cause changes in the actual code >> generated and not just add debug symbols to the elf? Possibly it is related >> to the optimization level? I have not checked to see if the results differ >> with higher or lower levels than -O1. >> >> I have seen several opinions regarding this but no authoritative answer. The >> gcc manual also does not really answer this. > > If the only change in the command line options is whether you use -g, > you should get exactly the same code. Any difference in code > generation is a bug. Please try to file a bug report according to the > guidelines at http://gcc.gnu.org/bugs/ . Thanks. > > Ian Hi, Gene, I also suggest to check assembly code sequence by having '-S' compilation option instead of using objdump to the binary. So that the influence of assembler/linker can be ruled out. Best regards, jasonwucj
