On Mon, May 22, 2017 at 05:22:48PM +0200, Mattia Verga wrote: > https://github.com/OpenPHDGuiding/phd2/issues/608 > > I'm getting ctest failure only on F26 (and rawhide) i386, while on F25 all > it's working fine. > Can a precision problem be introduced in Eigen3 with the passage from GCC6 > to GCC7? > Is it possible to set up a F26 mock chroot using GCC6 instead of GCC7? If it affects just i?86, then it might very well be just some code unable to deal with excess precision that i?86 has or with the default excess precision of fast. You can try -mfpmath=sse -msse2 (don't remember if Fedora still supports pre-SSE2 HW, if yes, then this isn't an option), or -ffloat-store (if you are willing to take the performance penalty, ideally on i?86 only), or make some floating point variable volatile, or, if C and not C++/Fortran, -fexcess-precision=standard. Jakub _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx
