https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83206
--- Comment #7 from Andrew Roberts <andrewm.roberts at sky dot com> --- I get the same thing if I just use -mcpu=native: /usr/local/gcc/bin/gcc -o matrix-v6 -mcpu=native -mfpu=auto -O3 matrix.c cc1: error: -mfloat-abi=hard: selected processor lacks an FPU I realize the aarch64 compiler does not need -mfpu=auto, but I was wondering if it was worth at least not rejecting it so makefiles can be portable between arm and aarch64. At present you get: gcc: error: unrecognized command line option ‘-mfpu=auto’ and the compile fails A Rasbperry PI Zero is the cheapest and easiest armv6 option, although it does take 24hrs to build the compiler
