On Thu, Oct 16, 2014 at 12:06 PM, Jonathan Wakely <jwakely.gcc@xxxxxxxxx> wrote: > On 16 October 2014 15:43, Johan Alfredsson wrote: >> Sorry, my mistake. It turned out that librt was implicitly linked in >> in the 4.9.1 case. However, the only things I use from librt are high >> precision timers, so a switch to ensure no performance hit in my own >> code would be great. > > Which suggests you were using --enable-libstdcxx-time=rt and so were > not using the same configuration for both compilers. No, this was something that happened due to the configuration of our in-house build system. As I said, the configuration of the compilers were identical. > If you had told us the actual configurations for both versions that > would have been obvious! I did, and that was not the issue here. > As Marc says, use a newer glibc to get high-precision timers without > needing librt. I'll look into that. Thanks, /Johan
