https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66326
--- Comment #3 from Eric <ejolson at unr dot edu> --- GCC version 5.2 has come around and the bug is still here. In particular, compiling for 32-bit Intel or using -mfpmath=387 in 64-bit leads to immediate floating point exceptions. The fix was to comment out the define RESTORE_X86_FP_STATE at the top of libcilkrts/runtime/config/x86/os-unix-sysdep.c because the code in the restore and save routines is SSE only. Note that changing floating point rounding modes may not function as expected on 32-bit or with -mfpmath=387 set, however, otherwise this simple fix is effective. As already before, more information and this work-around is at https://software.intel.com/en-us/forums/topic/558825