http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57688
--- Comment #8 from David Binderman <dcb314 at hotmail dot com> --- (In reply to Jakub Jelinek from comment #3) > Also, for any bugreport with -march=native or -mtune=native you need to > specify what options have been passed to cc1plus/cc1 (add -v), plus you > haven't provided preprocessed source. /home/dcb/gcc/results/libexec/gcc/x86_64-unknown-linux-gnu/4.9.0/cc1plus -quiet -v -D_GNU_SOURCE bug113.cc -march=amdfam10 -mmmx -m3dnow -msse -msse2 -msse3 -m no-ssse3 -msse4a -mcx16 -msahf -mno-movbe -mno-aes -mno-pclmul -mpopcnt -mabm -m no-lwp -mno-fma -mno-fma4 -mno-xop -mno-bmi -mno-bmi2 -mno-tbm -mno-avx -mno-avx 2 -mno-sse4.2 -mno-sse4.1 -mlzcnt -mno-rtm -mno-hle -mno-rdrnd -mno-f16c -mno-fs gsbase -mno-rdseed -mprfchw -mno-adx -mfxsr -mno-xsave -mno-xsaveopt --param l1- cache-size=64 --param l1-cache-line-size=64 --param l2-cache-size=512 -mtune=amd fam10 -quiet -dumpbase bug113.cc -auxbase bug113 -g -O3 -version -o /tmp/ccpBZ0u f.s