https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83206
--- Comment #22 from Andrew Roberts <andrewm.roberts at sky dot com> --- The RPI Zero bug was fixed, I'm retesting with the latest snapshot (8.0.1 20180304) just to be sure it is ok. There are still a number of inconsistencies and things which could be improved. On Odroid-Xu4 (Cortex A15/A7 Big/little, Aarch32) ------------------------------------------------- /usr/local/gcc/bin/gcc -mfpu=auto -O3 -o matrix matrix.c cc1: error: -mfloat-abi=hard: selected processor lacks an FPU It would be better if this error could let the user know they need to select a CPU manually, rather than incorrectly state it lacks an FPU. This is going to be confusing to people. /usr/local/gcc/bin/gcc -mcpu=native -mfpu=auto -O3 -o matrix matrix.c Is fine. /usr/local/gcc/bin/gcc -march=native -Q --help=target | grep "mcpu\|mfpu\|march" -march= armv7ve+vfpv3-d16 -mcpu= -mfpu= vfpv3-d16 /usr/local/gcc/bin/gcc -march=native -mcpu=native -Q --help=target | grep "mcpu\|mfpu\|march" -march= armv7ve+vfpv3-d16 -mcpu= cortex-a7 -mfpu= vfpv3-d16 This is still not detecting BIG/little CPU combinations (I had a separate PR about this [83207]). On ODROID-C2 (Cortex A53,AARCH64) ---------------------- /usr/local/gcc/bin/gcc -march=native -mcpu=native -Q --help=target | grep "mcpu\|mfpu\|march" -march=ARCH armv8-a+crc -mcpu=CPU cortex-a53 The output is inconsistent with aarch32 output (=ARCH, =CPU), I had also raised a PR about this [83193]. On RPI 3 (Cortex A53,AArch32) ----------------------------- No issues here that I can see. I'll update again tomorrow when the RPI Zero build has completed
